The data acquisition module, model A0K20005, features plug and play operation and USB interface for data transfer. It uses DIP switches to set a physical ID number for each board. It provides interrupt handing function and is equipped with both signal input and output connectors. In addition, input channel IN0 can be used as counter.

This high performance USB data acquisition module belongs to GAO’s family of Data Acquisition Products. This family of data acquisition boards is suitable for use in the lab, product quality testing centers and systems for different areas of data acquisition, waveform analysis and processing. This line also has other featured products including PCI Data Acquisition Module which is based on PCI bus and can be directly inserted into a compliant computer to allow for real-time signal processing and digital image processing; PCI Synchronous Data Acquisition Board specially designed for highly precise data acquisition analysis applications; and Wireless Data Transmission Module which is able to realize long-distance communication, wireless communication and Network communication.

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This innovative handheld fiber optic OTDR, model C0250003, is small in size, light in weight and has a splash proof design. It possesses many outstanding features including an extra-short event dead zone of only 1.6 m, a high resolution of 0.125 m, 65 k sampling points and a convenient visible fault location (VFL) function.

This OTDR provides various operating modes such as quick auto measuring mode, manual testing mode, average testing mode and blind zone testing mode. It also provides 3 wavelengths for selection including 1310/1550 nm ± 20 nm, 1550/1625 nm ± 20 nm and 1310/1550/1490 nm ± 20 nm in single mode fiber applications. It has a large memory capacity of 800 waveforms. In addition, it saves and transfers test results to a computer through a USB interface for further analysis, reporting and printing via included software.

This high performance easy to use fiber optic OTDR belongs to GAO’s family of OTDRs. An advanced product in this line is Handheld Fiber Optic OTDR specially designed for fiber network construction and maintenance in FTTx, WAN and CATV systems. This line also includes Multi-Function Optical Time Domain Reflectometer which provides three print modes including standard mode (full-size, multipage OTDR report), compressed mode (one page report) and curves (four six or eight curves on one page).

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This versatile electronic USB PC based oscilloscope model A0120008, operates at up to 200 MS/s real-time sampling. It possesses many outstanding features including 20 measurement functions, FFT spectrum analysis and PASS/FAIL checks. It utilizes a USB 2.0 interface without the need for an external power source.

This high performance 9-bit, two-channel 200 MHz USB PC based digital storage oscilloscope combines the functions of an oscilloscope, spectrum analyzer, waveform recorder, signal generator and multimeter. It displays waveform average, persistence, intensity, invert, addition, subtraction, multiplication, division and X-Y plot. Waveform output can be saved in text, MS Word, Excel or graphic (JPG or BMP) formats under Windows 98 to Windows Vista OS.

This easy to carry oscilloscope belongs to GAO’s family of USB PC Based Oscilloscope. Other similar products in this line are 40 MHz USB PC Based Oscilloscope, 60 MHz USB PC Based Oscilloscope and 100 MHz USB PC Based Oscilloscope. This line also has a series of 5-in-1 design Digital Storage Oscilloscopes which can efficiently solve complicated trigger problems by providing a comprehensive set of triggers such as rising or falling edge, pulse width, delayed and count.

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This versatile TV signal analyzer, model A0N00020, features a DVB-C/S/S2/T signal analysis function and MPEG2/4, H. 264, SD/HD decoding and image monitoring functions. It provides analog and digital TV and satellite TV monitoring and various video decoding using DSP technology. It is compatible with DVB-CI descrambling interface as well as HDMI, LAN and USB interfaces.

This analyzer is available with spectrum measurement, DVB-S/S2 signal analysis, DVB-C signal analysis, remote feed and control signal setting and TS analysis and monitoring. It conducts fast spectrum analysis over 5 MHz to 2150 MHz frequency span which covers TV broadcasting and satellite IF signals. Equipped with a high resolution 7″ TFT LCD with Windows style main menu, it is suitable for both indoor and outdoor use.

This high performance TV signal analyzer belongs to GAO’s family of CATV Meters & Instruments. Other featured products in this line include Handheld CATV/QAM Analyzer which boasts a CM statistic function, Ping function and bandwidth testing function; High-performance Digital Signal Level Meter which is intended for analog and digital television network construction and maintenance; and Handheld Signal Level Meter which tests CATV signal levels in both channel and frequency modes and measures CATV TILT, C/N and trunk cable voltage effectively and accurately.

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Toronto, Canada – GAO Instruments

This portable optical power meter, model C0260008, provides multi-wavelength precise measurements. It features rugged, durable construction and is a perfect choice for a wide range of field applications. It can also be used for linearity and non-linearity testing and can display both direct and relative tests of optical power.

This easy to use optical power meter efficiently performs both absolute power measurement and relative power measurement. It tests optical power at a wavelength range of 800 nm to 1700 nm. Calibrated wavelengths including 850, 1300, 1310, 1490, 1550 and 1625 nm are available. In addition, it is compatible with multiple standard adapters such as FC, ST SC and LC connectors.

This handheld optical power meter belongs to GAO’s family of Power Meters. Other featured products in this line include Handheld Optical Power Meter used for CATV installation and maintenance, LAN and WAN testing and quality assurance and acceptance testing; Fiber Optic Multimeter which performs closed-loop tests by using both optical power meter module and optical light source module; and Handheld PON Power Meter which performs simultaneous measurement and display of PON signals including voice, data and video optical signal.

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Toronto, Canada – GAO Instruments

This light weight and portable optical time domain reflectometer, model C0250001, can be used in both single mode (1310/1550 nm) and multi mode (850/1300 nm) fiber applications. Its unique hot key design makes it convenient and quick to conduct, review and analyze test results. It boasts highly precise measurements and a large memory capacity of 300 test curves.

The OTDR can save and transfer test results to a computer for further analysis, reporting and printing via RS232 or USB port. It is compliant with interchangeable adaptors (FC/SC/ST) for connection to different fiber types. It is equipped with LCD indicators for battery charging, LD lasing status indications and shipped with a Ni-MH rechargeable battery for over 3.5 hours of continuous testing on a single charge. In addition, it is able to withstand drops from a height of 1 meter by test.

This full function handheld fiber optic OTDR belongs to GAO’s family of OTDRs. Two other similar products in this line include Multi-Function Optical Time Domain Reflectometer providing wavelengths of 1310 and 1550 nm and featuring both auto and manual measurement modes, and Handheld Fiber Optic OTDR which features an extra-short event dead zone of only 1.6 m, a high resolution of 0.125 m, 65 k sampling points and a convenient visible fault location (VFL) function.

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Toronto, Canada – GAO Instruments

This variable attenuator, model C0270001, can be used in digital system communication devices such as PHD and SDH and also in analog modulation CATV systems. Other common applications for the attenuator include telecom maintenance, CATV maintenance, comprehensive cable construction systems, optical instruments research and development and optical communication training.

This portable optical variable attenuator combines the functions of both an attenuator and an optical power meter. It memorizes the attenuating value and step on shut down and restores the values on next power up. It displays absolute and relative attenuation value as well as wavelength, input power, output power, current attenuation and selected step size. In addition, its auto-off function deactivates after 10 minutes of idle time.

This attenuator belongs to GAO’s family of Fiber Optic Instruments. This line also includes Handheld Optical Power Meter which is specially used in the test of LAN, WAN, metropolitan, CATV and other long-distance fiber networks; Handheld Fiber Optic OTDR which is an innovative test instrument for telecommunication networks specially designed for fiber network construction and maintenance in FTTx, WAN and CATV systems; and Multi-Function Optical Talk Sets which can carry out full-duplex communication with a high quality connection over an exceptional communication distance.

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Toronto, Canada – GAO Instruments

This PCI data acquisition module, model A0K10009, features internal and external clock functions, AD continuum and grouping sampling function, and Timer/Counter function.. It is suitable for use in the lab, product quality testing centers and systems for different areas of data acquisition, waveform analysis and processing.

This high-speed and high-precision data acquisition module delivers the performance demanded in the fields of real-time signal processing and digital image processing. It supports multiple signal connection modes including AD input, digital input, digital output, clock and trigger. It has three status indicators: EF, FF and HF. It also offers a 16 k-word FIFO memory with three memory signs including non-empty and half-full.

This PCI data acquisition module belongs to GAO’s family of Data Acquisition Modules. Other products in this line are: PCI Data Acquisition Module which can be directly inserted into a compliant computer to allow for real-time signal processing and digital image processing, and PCI Synchronous Data Acquisition Board which is specially designed for highly precise data acquisition analysis applications and is an ideal tool for real-time signal processing as well as digital image processing.

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Toronto, Canada – GAO Instruments

This PON power meter, model C0260007, features auto power-saving design, light weight and smart navigation menu for simple operation. It is a useful tool that enables quick testing of all PON signals along the network and performs simultaneous measurement and display of PON signals including voice, data and video optical signal. It offers an optional visible fault locator (VFL) which easily identifies fiber and locates faults.

This PON power meter provides 10 groups of configurable threshold values and can save 1000 test results. It also provides simultaneous measurement of all three wavelengths on the fiber including 1490 nm, 1550 nm and 1310 nm. It connects to computer via USB interface for data upload, optical power calibration and threshold modification. In addition, it operates for up to 15 hours when fully charged.

This light weight handheld PON power meter belongs to GAO’s family of Power Meters. Other featured and widely-used products in this line include Handheld Optical Power Meter which is specially used in the test of LAN, WAN, metropolitan, CATV and other long-distance fiber networks. Fiber Optic Multimeter which integrates both an optical power meter module and an optical light source module in one unit, and Portable Optical Power Meter which is equipped with a single-chip microprocessor, a built-in long wavelength camera probe and newly designed electric rubber switch.

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Toronto, Canada – GAO Instruments

This ADSL2+ tester, model A0010007, has many outstanding features including easy menu operation, ISP login, IP Ping tests, auto shut off function and audio and LED alarm indications. It also provides modem emulation, telephone call functions and line voltage indication.

Aside from providing xDSL and dial testing, the tester also functions as a digital multi-meter (DMM). This handheld ADSL2+ tester is compliant with all known DSLAMs. It has a memory capacity to store up to 50 records. It communicates with a computer through an RS232 interface. In addition, its internal rechargeable 2800 mAH Li-Ion battery allows for 4 to 5 hours of continuous operation.

This multi-functional handheld ADSL2+ tester belongs to GAO’s family of ADSL Testers. Other featured products in this line are Multi- function Handheld xDSL Tester which is an ideal tool for the installation, maintenance and troubleshooting of any xDSL network, Multi-function ADSL/ADSL2+ Tester which provides multiple test functions including upstream and downstream rate measurements, error counts, modem simulation and PING and Trace testing and Portable xDSL Tester which evaluates line quality, performs PPPoE dial-up, provides Web page browsing and emulates a PC+ Modem in order to test the connection to the ISP.

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Toronto, Canada – GAO Instruments

This digital storage oscilloscope, model A0120006, operates at 170 MHz bandwidth and supports up to 512 universal trigger levels. It also provides a maximum repeat sampling rate of 20 GS/s and single shot sampling rates of up to 1 GS/s. The DSO has 4 MB/8 MB sampling data acquisition buffers on each channel and boasts a Fast Fourier Transformation (FFT) function for bandwidth tests.

This digital storage oscilloscope efficiently solves complicated trigger problems by providing a comprehensive set of triggers such as rising or falling edge, pulse width, delayed and count. This digital storage oscilloscope also has a precision 125 MHz frequency counter, multi-window software, optional DLL libraries and up to 7 digital resolutions at 1 MB memory for each analog channel as well as convenient timing state display for logic debugging.

This digital storage oscilloscope belongs to GAO’s family of USB PC Based Oscilloscopes. By connecting with your PC’s parallel or USB port, GAO USB PC Based Oscilloscopes provides a reasonably priced measurement solution through its professional software. This line also includes 40 MHz USB PC Based Oscilloscope which operates at up to 100 Ms/s real-time sampling rate at a bandwidth of 40 MHz and 60 MHz USB PC-Based Oscilloscope which operates at up to 150 MS/s real-time sampling rate at a bandwidth of 60 MHz.

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Toronto, Canada – GAO Instruments

This DDS function generator, model A0230007, has a highly accurate and stable output. It is designed based on DDS (Direct Digital Synthesized) technology and can generate a variety of precise wave shapes over a frequency range of 40 µHz to 60 MHz. Its waveform length is 4 points to 16000 points and output waveforms include Sine, Square, Pulse and DC.

This DDS function generator has outstanding features including convenient data input via dial or numerical keyboard and protection against over voltage, over current, short circuit and reverse voltage. It provides stable output waveforms down to 1 mV with impedances of 50 Ω and has a high pulse duty cycle resolution of up to 0.1%. The generator can store 40 groups of settings. In addition, it includes both an RS-232 interface and a USB interface.

This easy-to-use DDS function generator belongs to GAO’s family of Logic Analyzers and Generators. This line also consists of Digital RF Millivoltmeter and Frequency Counter which utilizes a new kind of micro-controller and measures sinusoidal signal voltage over a wide frequency range of 10 kHz to 2000 MHz and DDS Function Generator with Arbitrary Waveform Function which is designed for use in such applications as communication equipment and electronic components production. GAO’s family has provided the users a lot of featured products with good quality, competitive price and good service and is well accepted by most customers in North America.

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Toronto, Canada – GAO Instruments

This high performance data acquisition module, model A0K40001, features ease of use, cost efficiency and stable performance. It can be directly inserted into an Ethernet interface for product quality testing and systems for different areas of data acquisition, waveform analysis and processing. It offers 8-channel/16-channel single-ended inputs or 8-channel differential inputs and different input or single-ended input can be selected. This 16-bit resolution data acquisition module also provides a Flash memory of 256 MB. The sampling frequency for each channel is 10, 15, 20, 25 or 30 kHz.

This high speed, high precision data acquisition module belongs to GAO’s family of Data Acquisition Modules. This family of data acquisition boards is suitable for use in the lab, product quality testing centers and other systems for data acquisition, waveform analysis and processing. It has Wireless Data Transmission Module which is able to achieve long-distance communication, wireless communication and Network communication, USB Data Acquisition Module which is an ideal tool for waveform and processing system analysis as well as the industrial production process control monitoring and PCI Synchronous Data Acquisition Board which provides multiple signal connection modes including analog signal, synchronous trigger plus signal, clock signal and trigger signal.

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Toronto, Canada – GAO Instruments

This USB PC-based logic analyzer, model A0220001, is used for test, diagnostics, and analysis of digital signals. It uses advanced large-scale integrated circuits, high-frequency digital circuits, and embedded systems. The analyzer is capable of observing multi-channel data flow and control information simultaneously and captures narrow pulse interference information. Its delay function allows it to capture the waveforms prior to or behind the required observation points.

The multi-function logic analyzer features a variety of digital information capture functions, burr-detection ability, a large memory capacity, and multiple trigger modes. It measures 34 channels at 500 MHz sample rate and supports compatible inputs including TTL, LVTTL, CMOS, LVCOMS, ECL, PECL, and EIA. The analyzer is able to detect error messages and locate faults in the source code and has CPLD and FPGA functionality. It returns dynamic analysis results in binary, decimal, hexadecimal or ASCII format to facilitate debugging. In addition, this easy-to-use portable analyzer is controlled and powered from a USB port and runs under Windows 2000, Windows XP, VISTA operating systems.

This USB PC-based logic analyzer belongs to GAO’s family of Automotive Oscilloscopes. Several advanced products are included in this line for use in designing, testing, troubleshooting, and repairing electronic or electro acoustic devices. One featured product is 4-Channel Automotive Tester/Diagnostic Oscilloscope which has more than 20 automatic measurement functions, automatic cursor tracking measurements, as well as, fast Fourier transform (FFT) spectrum analysis. Another is Portable Digital Scope w/FFT which can detect the average and peak values of a waveform and can store up to 5000 waveform points per channel.

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Toronto, Canada – GAO Instruments

This compact fiber optic identifier, model C0230001, employs safe and reliable macro bending technology to avoid the disruption of network communications that would normally be caused due to the need to disconnect or cut the fiber optic cable for identification and testing. With a very small signal loss, normal communications can be maintained while identifying the transmission direction, speed and relative signal strength on its 5-level display.

This portable and simple to use fiber optic identifier offers a wavelength range of 800 to 1700 nm. It identifies signal frequencies of CW, 270 Hz, 1 kHz, and 2 kHz. The identifier is compatible with multiple adapters including Φ250 µm bare fiber, Φ900 µm tight tube fiber and Φ3 mm pigtail fiber. It provides communication signal indications, comparison light indication and has 5 LED for signal intensity indication. The identifier has a low-voltage indicator and an automatic shutdown function when not in use. Its rechargeable lithium battery allows for more than 4 hours of continuous operation.

This compact fiber optic identifier belongs to GAO’s family of Optical Fiber Identifiers. Another similar product in this line is Portable Optical Fiber Identifier which features core power display of the fibers, low bending loss and highly efficient output and serves as an essential tool in the installation and maintenance of telecommunication and CATV systems and other fiber networks. The two handheld identifiers are simple, rugged, easy-to-use test instruments to detect the presence of network traffic, test tones and multiple signals and determine the direction of signal flow.

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Toronto, Canada – GAO Instruments

This portable Gigabit Ethernet tester, model A0060001, conducts full RFC2544 benchmark test of throughput, frame loss rate and latency. It is capable of testing connectivity and termination mode, identifying short circuits, open circuits, cable length, and analyzing frame length, frame type and used ratio status. The portable Gigabit Ethernet tester provides test tools including port positioning, packet capture, and loopback. It also has single and multiple site traffic generation functions.

This tester boasts a large memory capacity for storage of settings and test data. Equipped with a 4.3 in color touch LCD screen and smart navigation menus, this tester shows test results in texts or graphics. The tester is compliant with IEEE802.3, RFC1242 and RFC2544 standards and can be upgraded via the included software. In addition, it is able to connect with a computer via an external USB or Ethernet port for data exchange.

This well designed Gigabit Ethernet tester belongs to GAO’s family of Telecom Tester and Analyzers. This category is divided into many fields that can fulfill customers’ different requirements. One line encompasses three powerful datacom analyzers such as Portable E1/Datacom Transmission Analyzer which has many enhanced test functions such as “PCM Simulator”, “Mux/Demux”, “Drop & Insert” and “Network Tools”, Data Transmission Analyzer and E1/T1 BER Tester which is designed for frame synchronization code monitoring, CRC monitoring, offline error testing, signal waveform analysis, IP PING testing, offline and online monitoring and ITU-T G.703 error analysis and SDH/PDH Transmission Analyzer.

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Toronto, Canada – GAO Instruments

The multi-function ADSL/ADSL2+ tester, model A0010006, provides upstream and downstream rate measurements, error counts, modem simulation and PING and Trace testing. It also delivers digital multi-meter (DMM) functionality to test subscriber telephone connectivity and line parameters. It is compliant with RJ-11, RJ-45 and DDM connector for data exchange and is capable of a long transmission distance of up to 6.5 km.

This tester is equipped with a high resolution back lit LCD screen. Test results and line parameter measurements are easily obtained with a push of the “Auto Test” key. It utilizes Voice and LED status indicators and automatic shut off function and histogram analysis are enabled. It has built-in Ni-MH rechargeable batteries and smart charger circuitry which allows 2 hours of continuous operation.

This high performance multi-function ADSL/ADSL2+ tester belongs to GAO’s family of ADSL Testers. Other advanced products in this line are Portable ADSL2+ Tester which functions as a digital multi-meter (DDM) and is able to conduct tests while the operator browses previous test records, Multi- function Handheld xDSL Tester which can be used in “ATUR+PC” emulation without an additional ADSL2+/VDSL2 modem or computer and Pocket Size Handheld ADSL2+ Tester which provides modem emulation, telephone call functions and line voltage indication. It is an ideal tool for ADSL/ADSL2+ network installation, maintenance and fault elimination.

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Toronto, Canada – GAO Instruments

This 25 to 100 MHz bandwidth 2 channel digital storage oscilloscope, model A0110001, provides real-time sampling rates from 100 to 250 MSa/s and rise time from less than 14 ns to 3.5 ns. It offers three different bandwidths of 25, 60 or 100 MHz and comes with 2 passive probes which are switchable between 1:1 and 10:1 input ratio. Also, it detects the average and peak values of a waveform and stores up to 5000 waveform points per channel.

The digital scope provides an auto-scale function, multiple-waveform calculation function, FFT function and automatic settings function for fast set up. It offers advanced triggering functions including edge trigger, video trigger and alternate trigger. It is equipped with RS232 or USB interfaces for data storage and printing. In addition, this scope is capable of a long operating time of up to 4 hours.

This portable digital scope belongs to GAO’s family of Portable Digital Oscilloscopes. Other featured products in this line include 4 Channel Mini Digital Oscilloscope which is based on ARM cortex M3 (STM32F103VCT6) 32 bit platform and provides a real-time sampling rate of 72 MSa/s with integrated FPGA and high speed ADC, Handheld 2 Channel Digital Oscilloscope w/DMM which has all of the functionality of a digital multimeter (DMM), such as measurements for voltage, current, resistance, capacitance, and diode and continuity check and Portable Two Channel 150 MHz Digital Oscilloscope which features mathematical functions, advanced triggering methods, FFT spectrum analysis and automatic parameter measurements.

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This high performance digital storage oscilloscope, model A0110004, features auto scale function, automatic settings function, automatic parameter measurements and advanced triggering options. The oscilloscope boasts 27 automatic waveform measurement functions and advanced triggering functions such as edge, pulse, video and alternative. Cursor tracking measurement is provided.

The oscilloscope has special recording, storage and playback functions as well as math functions including add, subtract, multiply and divide. GAO Instruments’ A0110004 digital storage oscilloscope series cover bandwidths from 25 MHz to 200 MHz and provide real-time and equivalent sample rates respectively from 1 GSa/s to 25 GSa/s.

These handheld digital storage oscilloscopes belong to GAO’s family of Portable Digital Oscilloscopes. This line also includes 4-Channel Mini Digital Oscilloscope which has an internal 2 MB USB disk to store waveforms, user applications and for firmware upgrades, Portable Two Channel 100 MHz Digital Oscilloscope which has 100 MHz bandwidth and 4 k memory depth per channel and Handheld 2 Channel Digital Oscilloscope w/DMM which has all of the functionality of a digital multimeter (DMM), such as measurements for voltage, current, resistance, capacitance, and diode and continuity check.

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Toronto, Canada – GAO Instruments

This 4-channel 60 MHz automotive diagnostics oscilloscope, model A0E20001, features more than 20 kinds of automatic measurement functions, automatic cursor tracking measurements, as well as PASS/FAIL check functions. It conducts vehicle diagnosis for ignition, injectors and fuel pumps. This versatile function generator has a built-in frequency counter and fast Fourier transform (FFT) spectrum analysis.

The EXT trigger diagnostic oscilloscope provides advanced trigger types including edge trigger and pulse trigger and trigger modes such as auto, normal and single. It offers a vertical resolution of 8 bits/channel and a time base range from 5 ns/div to 1000 s/div. This automotive diagnostics oscilloscope also has two acquisition modes including real-time sampling and roll modes with a buffer size from 10 k to 16 M samples. In addition, it is compatible with operating systems from Windows NT to Windows 7.

This 4-channel automotive tester/diagnostic oscilloscope belongs to GAO’s family of Automotive Testers. Several other digital oscilloscopes for automatic testing are included in this line such as Multi-Channel Logic Analyzer which is capable of observing a sizable amount of data and data flow direction control information simultaneously and captures narrow pulse interference information, Portable Digital Scope w/FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing, and Handheld Two Channel 20 MHz Digital Oscilloscope w/DMM which integrates a digital oscilloscope (DSO), a digital Multimeter (DMM) and a Cymometer into one unit.

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Toronto, Canada – GAO Instruments

This wireless data transmission terminal, model A0K30001, is specially designed based on GPRS and provides AI, AO, DI, and DO capabilities. It features reliable design with redundant hardware and software and a built-in watchdog. Also the device’s drivers provide easy installation and configuration. It provides 8-channel 16-bit differential isolated analog input and 2-channel 12-bit isolated analog output, 8-channel isolated digital input and 8-channel relay output.

The data transmission module provides three operating modes including on-line forever, idle offline and idle power-off and has an automatic re-connection function. It also offers local and remote graphical interface for configuration and the maintenance and its firmware can be upgraded locally or remotely. In addition, the wireless data transmission module runs under most popular operating systems such as windows XP/2000/2003/Vista.

This high performance wireless data transmission module belongs to GAO’s family of Data Acquisition products. This family of data acquisition boards is suitable for use in the lab, product quality testing centers and systems for different areas of data acquisition, waveform analysis and processing. Featured products are Data Acquisition Board which can be directly inserted into a computer to allow for real-time data acquisition and control applications within the scope of Windows systems, PCI Data Acquisition Module which features high speed and high precision and PCI Synchronous Data Acquisition Board.

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Toronto, Canada – GAO Instruments

This portable TDR cable fault locator, model GAO A0080001, employs DAGC (Digital Automatic Gain Control) and Digital Waveform Automatic Recognition technologies for automatically recognizing faults which are not found with manual testing. It operates in both pulse reflection testing and bridge testing modes. In pulse mode, the locator tests for line breaks with a wide measurement range of 0 m to 8 km. In bridge mode, it locates shorts and bad insulation with an error rate of 1 percent of full length. It is suitable for 0.32 mm, 0.4 mm, 0.5 mm, 0.6 mm telephone cables.

Featuring a 0 m dead zone test distance, the fault locator accurately detects fiber faults. It performs insulation resistance and loop resistance testing when used as DMM. The locator features a field calibration function and a contrast function for 2 waveforms. It stores 10 testing waveforms, and measurement results can be uploaded through the USB interface. It has a built-in 2 Ah lithium-ion rechargeable battery and is equipped with touch color screen.

This TDR cable fault locator belongs to GAO’s family of Telecom Line Testers. This line includes other two technically advanced line testers such as TDR Cable Fault Locator which features full automatic and manual testing functions, automatic balance and gain adjustment and a testing dead zone of 0 m and Compact Telecom Line Tester which incorporates the functions of a telephone set, a circuit performance tester and a security tester making it a comprehensive device for detecting line errors.

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Toronto, Canada – GAO Instruments

This digital fiber fusion splicer, model C0210002, features single X or Y view and simultaneous X and Y views, a short splicing time of 9 seconds and an impressive tube heating time of 30 seconds. It is designed for single mode fiber, multi-mode fiber, dispersion-shifted fiber (DSF) and non-zero dispersion-shifted fiber (NZ-DSF). It can detect cleaved fiber end-face faults and adjusts parameters automatically.

This compact fiber fusion splicer utilizes USB for data communication and software upgrades. It offers a fiber cleave length of 8 mm to 16 mm with coating diameter of 250 µm. Equipped with a 5.6 inch color VGA LCD screen, it displays the cleaved fiber and offset angle and core and clad offset clearly. In addition, it has a large capacity battery which typically runs 160 cycles.

This digital fiber fusion splicer belongs to GAO’s family of Fusion Splicers. Another product in this line is Fiber Fusion Splicer which is designed for single mode fiber, multi-mode fiber, dispersion-shifted fiber (DSF), non-zero dispersion-shifted fiber (NZ-DSF) and erbium-doped fiber (EDF). It offers both manual and automatic splicing modes. GAO’s family has provided a lot of featured products with good quality, competitive price and good service and is well accepted by customers all over the world such as Canada, United States, UK, Australia and Italy.

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Toronto, Canada – GAO Instruments

This handheld visible laser source, model C0280003, features low voltage warning, auto power-off, simple button operation and an energy-saving design. This compact visible laser source operates at a wavelength of 650 nm ± 20 nm and is a perfect helper for use with an OTDR. It is equipped with FC, ST and SC adaptors and is also available for CW and 2 Hz alternative optical output modes.

This visible laser source uses visible red light to indicate the location of fiber faults from a macro bend point, break, problem coupler or connector or a mechanical splice that is not well aligned. It can distinguish the faults in fiber jumpers, jumper boards, distribution frames and tie-ins. It is powered by a 9 V/160 mAh NI-MH rechargeable battery which provides continuous operation of 8 to 10 hours.

This handheld visible laser source belongs to GAO’s family of Visual Fault Locators. Another featured product in this line is Optical Visual Fault Locator which is commonly used in quickly verifying continuity, checking the validity of patch cables and locating faults in the continuity of both single mode (SM) and multimode (MM) optical fibers. GAO becomes the best choice with its good quality, specific features, multiple functions, and competitive prices. Most of our customers in North America such as Los Angeles, San Diego and Miami are satisfied with our products and our best services.

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Toronto, Canada – GAO Instruments

This digital meter, model A0230003, features a compact size, light weight and low power consumption. It also features rapid frequency response, small standing wave coefficient, high sensitivity, accuracy, reliability and high price-to-quality ratio. It measures sinusoidal signal voltage over a wide frequency range of 10 kHz to 2000 MHz. The digital RF millivoltmeter and frequency counter also has a highly accurate and highly stable output.

This easy-to-use digital RF millivoltmeter and frequency counter belongs to GAO’s family of Logic Analyzers and Generators. This line also consists of DDS function generator which is used in development, testing and repair of electronic equipment and DDS Function Generator with Arbitrary Waveform Function which is designed for use in such applications as communication equipment and electronic components production. GAO’s family has provided the users a lot of featured products with good quality, competitive price and good service and is well accepted by most customers in North America.

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Toronto, Canada – GAO Instruments

This radio frequency spectrum analyzer, model A0070002, features a small size and light weight. It uses locked-phase local and all-digitized medium frequency processing technologies. All RBW/VBW filters and medium frequency/video detectors are digital. It operates over a wide frequency range of 9 kHz to 3 GHz. The analyzer provides a resolution bandwidth of 100 Hz to 1 MHz at an accuracy of ± 25% (1 MHz) or ± 10% (<1 MHz).

This analyzer conforms to third-level equipment standard in GJB3947–2000. Its internal non–volatile memory can store 200 groups of measurement data, which can be downloaded via its RS232 interface. It is equipped with a 6-inch VGA TFT color LCD screen providing clear signal detail. In addition, its large capacity rechargeable lithium battery ensures a long operating time of up to 4 hours.

This high performance radio frequency spectrum analyzer belongs to GAO’s family of Telecom Testers and Analyzers. Featured products included in this line are TDR Cable Fault Locator which is ideal for localization of breaks, shorts, poor electric insulation and other faults of various telephone cables, RF cables and coaxial cables, Handheld Portable Gigabit Ethernet Tester which supports multiple functions including network testing, data packet capture, traffic generation, cable testing and BER testing. This line also has Portable E1/Datacom Transmission Analyzer and Multi-function ADSL/ADSL2+ Tester.

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Toronto, Canada – GAO Instruments

This handheld optical power meter, model C0260002, features a wide range of power measurements, high accuracy and a self-calibration function. It can be used for absolute optical power measurements as well as relative loss measurements in optical fibers. This power meter offers an auto-off function which shuts the device down after 10 minutes of inactivity.

This high performance compact optical power meter operates over a wavelength range of 800 nm to 1700 nm. Its calibrated wavelengths include 850 nm, 980 nm, 1300 nm, 1310 nm, 1490 nm and 1550 nm. It can use FC connectors and interchangeable SC and ST connectors as well as 2.5 m universal connectors. In addition, this low-power device boasts a maximum continual operation time of 240 hours with three fully charged 1.5 V alkaline batteries.

This handheld optical power meter belongs to GAO’s family of Power Meters. This line includes other featured products such as Handheld PON Power Meter which is specially designed for the construction and maintenance of PON networks which can be connected between OLT and ONT, Fiber Optic Multimeter which integrates both an optical power meter module and an optical light source module in one unit and performs closed-loop tests by using both modules and Handheld Optical Power Meter which is a compact and easy-to-use test instrument for fiber network installation, acceptance testing and maintenance.

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Toronto, Canada – GAO Instruments

This TV signal analyzer, model A0N00020, features a DVB-C/S/S2 / T signal analysis function and an MPEG2/4, H. 264, SD/HD decoding and image monitoring function. The analyzer provides analog/digital TV and Satellite TV monitoring and supports different video decoding. It also supports SD&HD video format and CAM module (Conditional Access) for encrypted channels.

This TV signal analyzer utilizes DSP technology to support different video decoding such as MPEG-2, MPEG-4 and H.264 for 1080i, 720p and 576i. It also supports PAL, NTSC and SECAM color systems. It is compatible with DVB-CI descrambling. Equipped with a high resolution 7″ TFT LCD and with windows style main menu, it allows ease-of-use and is suitable for both indoor and outdoor use.

This handheld CATV/QAM analyzer belongs to GAO’s family of CATV Meter & Instruments. This line includes similar products such as High-performance Digital Signal Level Meter which is intended for analog and digital television network construction and maintenance, handheld CATV/QAM analyzer which is also commonly used to measure QAM digital channels, analog channels and FM channels. Analog channel analysis includes single-frequency level, carrier level of full channels spectrum, HUM, modulation depth, TILT and C/N and Portable PCM Channel Analyzer which is widely used to measure PCM devices, digital switches, carrier wave communication devices and VoIP devices.

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This multi-function logic analyzer, model A0220001, features a variety of digital information capture functions, a large memory capacity, and multiple trigger modes. The analyzer is capable of observing a sizable amount of data and data flow direction control information simultaneously and captures narrow pulse interference information. It has 34 input channels and supports a maximum sample rate of 500 MHz. Its delay function allows it to capture the waveforms prior to or behind the required observation points.

The analyzer uses advanced large-scale integrated circuits, high- frequency digital circuits, embedded systems and the other advanced technologies. It is able to see error messages and locate faults in the source code. The analyzer’s intuitive and flexible display returns dynamic analysis results in binary, decimal, hexadecimal or ASCII format to facilitate debugging. It has CPLD and FPGA functionality. This portable, easy-to-use analyzer also has integrated USB 2.0.

This portable and multi-function logic analyzer belongs to GAO’s family of Automotive Testers. Featured products in this line also includes 4-Channel Automotive Tester/Diagnostic Oscilloscope which has a wide input voltage range from 8 to 36 V making it suitable for vehicle power tests, Portable Digital Scope w/FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing and Handheld Two Channel 20 MHz Digital Oscilloscope w/DMM which integrates a digital oscilloscope (DSO), a digital Multimeter (DMM) and a Cymometer into one unit.

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This USB PC based oscilloscope, model A0120008, features a USB2.0 interface without the need for an external power source. It is easy-to-carry and is suitable for use with a notebook computer. It displays waveform average, persistence, intensity, invert, addition, subtraction, multiplication, division and X-Y plot. This oscilloscope also performs FFT spectrum analysis.

This high performance 9-bit, two-channel 200 MHz USB PC based digital storage oscilloscope combines the functions of an oscilloscope, spectrum analyzer, waveform recorder, signal generator and multi-meter into this single device. It operates at up to 200 MS/s real-time sampling. Its waveform output can be saved in text, MS Word, Excel or graphic (JPG or BMP) formats under most OS from Windows 98 to Windows Vista.

This 200 MHz USB PC based oscilloscope belongs to GAO’s family of USB PC Based Oscilloscopes. Similar products in this line are 40 MHz USB PC Based Oscilloscope, 60 MHz USB PC Based Oscilloscope and 100 MHz USB PC Based Oscilloscope. It also includes Digital Storage Oscilloscope which integrates a digital oscilloscope, a logic analyzer, a FFT spectrum analyzer, an electronic counter and a clock Jitter analyzer into one device. By connecting with your PC’s parallel or USB port, GAO USB PC Based Oscilloscope will provide a low cost but ultimate test and measurement solution through its professional software which has free upgrades via the web.

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Toronto, Canada – GAO Instruments

The ADSL/ADSL2+ tester, model A0010006, features easy-to-use, handheld design and large, high resolution back lit LCD screen. It provides multiple test functions including upstream and downstream rate measurements, error counts, modem simulation and PING and Trace testing. It also delivers digital multi-meter (DMM) functionality to test subscriber telephone connectivity and line parameters.

Test results and line parameter measurements are easily obtained with a push of the “Auto Test” key. It utilizes Voice and LED status indicators and supports automatic shut off function and histogram analysis. It also has built-in Ni-MH rechargeable batteries and smart charger circuitry which supports 2 hours continuous operation. In addition, this tester is compliant with RJ-11, RJ-45 and DDM connector for data exchange and is capable of a long distant transmission of up to 6.5 km.

This pocket size handheld ADSL2+ tester belongs to GAO’s family of ADSL Tester. This line includes a wide variety of testers such as Portable ADSL2+ Tester which is able to conduct tests while the operator browses previous test records, Multi- function Handheld xDSL Tester which is an ideal tool for the installation, maintenance and troubleshooting of any xDSL network and Portable xDSL Tester which evaluates line quality, performs PPPoE dial-up, provides Web page browsing and emulates a PC+ Modem in order to test the connection to the ISP.

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Toronto, Canada – GAO Instruments

This high performance impedance analyzer, model A0E40002, performs comprehensive measurements including Impedance (Z), Admittance (Y), Phase Angle (θ), Reactance (X), Conductance (G), Susceptance (B), Inductance (L), Capacitance (C), Quality Factor (Q), Dissipation Factor (D) and Resistance (DCR). Advanced calibration and error compensation functions eliminate measurement errors when performing measurements on in-fixture devices.

This easy-to-use impedance analyzer features basic accuracy of 0.1%, frequency step resolution of 5 digits and straight forward intuitive operation. It offers a variety of data interfaces including GPIB, RS232 and handler port, making remote control straightforward. 64 multi-step files can be saved/recalled from the internal nonvolatile memory. In addition, it provides accurate measurement over wide impedance range and wide frequency range.

This impedance analyzer belongs to GAO’s family of Electrical Testers. Featured products in this line contain Handheld Two Channel 20 MHz Digital Oscilloscope with DDM which features an auto scale function, automatic settings function, automatic parameter measurements, multiple wavelength calculation functions and advanced triggering options, Multi-Function Logic Analyzer which is capable of observing a sizable amount of data and data flow direction control information simultaneously and captures narrow pulse interference information and Portable Digital Scope with FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing.

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This compact and easy-to-use optical light source, model C0220004, offers high accuracy and reliability for evaluating a wide range of optical devices and systems such as WNM. This high performance handheld fiber optic light source operates at two frequencies: CW, 2 Hz modulation output at 650nm and CW, 270 Hz, 1 kHz, 2 kHz modulation output at other wavelengths. It also provides optional auto-off function which makes the instrument deactivated after 10 minutes of the idle time ensuring a long battery life.

This fiber optical light source features 1 to 4 output wavelengths to meet specific requirements including 650 nm red source, 1310/1550 nm wavelengths for single mode fiber and 850/1300 nm wavelengths for multimode fiber. Other wavelengths are available to meet specific needs. It is compatible with both PC and FC optical connectors. In addition, it is powered by 3 AA 1.5 V Alkaline batteries which allows for a very long continual operation time of up to 45 h.

This optical light source belongs to GAO’s Light Source family of products which contains products such as Compact Optical Laser Source which is ideal for simulating various conditions in the manufacture, testing and maintenance of passive optical components, Handheld Adjustable Light Source which provides 1 to 4 wavelengths and its output power is adjustable according to customer’s specific need and Fiber Optic Multimeter which integrates both an optical power meter module and an optical light source module in one unit and performs closed-loop tests by using both modules. GAO has a series of Fiber Optic Instruments that can satisfy consumers’ demands.

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This multi-function ADSL2+ tester, model A0010007, features easy menu operation, ISP login, IP Ping tests, auto shut off function and audio and LED alarm indications. It also provides modem emulation, telephone call functions and line voltage indication.

Aside from providing xDSL and dial testing, the tester also functions as a digital multi-meter (DMM). This handheld ADSL2+ tester is compliant with all known DSLAMs. It has a memory capacity to store up to 50 records. It communicates with a computer through an RS232 interface. In addition, its internal rechargeable 2800 mAH Li-Ion battery allows for 4 to 5 hours of continuous operation.

This pocket size handheld ADSL2+ tester belongs to GAO’s family of ADSL Testers. This line includes a wide variety of testers such as Portable ADSL2+ Tester which is able to conduct tests while the operator browses previous test records, Multi- function Handheld xDSL Tester which is an ideal tool for the installation, maintenance and troubleshooting of any xDSL network, Multi-function ADSL/ADSL2+ Tester which provides multiple test functions including upstream and downstream rate measurements, error counts, modem simulation and PING and Trace testing and Portable xDSL Tester which evaluates line quality, performs PPPoE dial-up, provides Web page browsing and emulates a PC+ Modem in order to test the connection to the ISP.

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Toronto

This portable CATV/QAM analyzer, model A0N00014, features easy operation, fast spectrum analysis, auto/limit test function and channel and spectrum scanning. It has digital signal analysis functions for channel power, MER, BER and constellation diagrams for 16/32/64/128/256QAM/QPSK modulation types. It also offers a fast spectrum analysis function, CM statistic function, Ping function and bandwidth testing function.

The compact analyzer runs under the Linux operating system, has a built-in Web browser and communicates with a computer via a USB port for simple data communications and storage. It operates over a wide frequency range of 5 MHz to 1000 MHz. Its cable modem testing mode is compatible with DOCSIS 1.X, DOCSIS 2.0, and DOCSIS 3.0. In addition, it is powered by a 14.8 V 2.1 Ah rechargeable battery providing more than 5 hours continuous operation when fully charged.

This handheld CATV/QAM analyzer belongs to GAO’s family of CATV Meters & Instruments. This line includes similar products such as High-performance Digital Signal Level Meter which is intended for analog and digital television network construction and maintenance, Portable CATV Signal Analyzer which measures CATV TILT and trunk cable voltage accurately and also tests DVB-C digital signal features including average peak power, MER, BER, C/N, EVM and provides constellation diagram and Portable PCM Channel Analyzer which is widely used to measure PCM devices, digital switches, carrier wave communication devices and VoIP devices.

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This digital storage oscilloscope, model A0120006, features a 5-in-1 design, that is, it integrates a digital oscilloscope, a logic analyzer, a FFT spectrum analyzer, an electronic counter and a clock Jitter analyzer into one device. The module efficiently solves complicated trigger problems by providing a comprehensive set of triggers such as rising or falling edge, pulse width, delayed and count. It operates at 170 MHz bandwidth and supports up to 512 universal trigger levels.

This digital storage oscilloscope provides a maximum repeat sampling rate of 20 GS/s and single shot sampling rates of up to 1 GS/s. The DSO has 4 M/8 M sampling data acquisition buffers on each channel and boasts a Fast Fourier Transformations (FFT) function for bandwidth tests. This digital storage oscilloscope also provides a precision 125 MHz frequency counter, multi-window software, optional DLL libraries, and up to 7 digital resolutions at 1 M memory for each analogy channel as well as convenient timing state display for logic debug.

This digital storage oscilloscope belongs to GAO’s family of USB PC Based Oscilloscopes. Featured products in this line are 200 MHz USB PC Based Oscilloscope which is commonly used for the maintenance of electronic equipment and laboratory and 100 MHz USB PC Based Oscilloscope. By connecting with your PC’s parallel or USB port, GAO USB PC Based Oscilloscopes provide a low cost yet robust test and measurement solution.

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The 6 bit handheld digital storage oscilloscopes, model A0110004, feature auto scale function, automatic settings function, automatic parameter measurements, and advanced triggering options. They have 27 automatic waveform measurement functions and offer such advanced triggering functions as edge, pulse, video and alternative. They also perform cursor tracking measurements and have special recording, storage and playback functions.

GAO Instruments’ A0110004 digital storage oscilloscope series cover bandwidths from 25 MHz to 200 MHz and provide real-time and equivalent sample rates respectively from 1 GSa/s to 25 GSa/s. They provide math functions including add, subtract, multiply and divide. They also allow multifunctional dials and powerful shortcut key operations which save time in operation. In addition, the oscilloscope provides up to 3 hours continuous operation.

These handheld digital storage oscilloscopes belong to GAO’s family of Portable Digital Oscilloscope. Featured products in this line are Portable Digital Scope with FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing, 4-Channel Mini Digital Oscilloscope which is based on ARM cortex M3 (STM32F103VCT6) 32 bit platform and provides a real-time sampling rate of 72 MSa/s with integrated FPGA and high speed ADC and Portable 2-Channel 150 MHz Digital Oscilloscope which has 150 MHz bandwidth and 4 k memory depth per channel and offers up to 250 MS/s real-time sample rate. This line also has Portable Two Channel 100 MHz Digital Oscilloscope and Handheld Two Channel 20 MHz Digital Oscilloscope with DDM.

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This advanced, handheld SDH/PDH transmission analyzer, model A0020005, performs on-line and off-line tests of T1, E1, E2, E3, E4, DS1, DS3, STM-1 (155M), STM-4 (622M), and STM-16 (2.5G). Its various functions also include automatic tributary scanning, automatic protection switching (APS), round trip delay measurement, TCM serial monitoring, timing and synchronization testing and real-time optical power testing. Performance analysis conforms to G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards.

This transmission analyzer features flexible, software-definition, simulated LED for current and historical error indication. It incorporates electrical interfaces for SDH/PDH and optical interfaces for SDH/SONET while Tx and Rx are completely independent. This analyzer has a large memory capacity to record bit error and alarm events that can be displayed in charts and graphics. Test results can be saved in HTML or TXT format and uploaded to for further analysis, reporting and printing. Additionally, it is powered by a rechargeable Li-ion battery for continuous operation of more than three hours.

This portable SDH/PDH transmission analyzer belongs to GAO’s family of E1 BER testers. Featured products in this line include Multi-functional E1/Datacom Tester which provides various protocol converters with one-way and bi-directional bit-error-rate (BER) test functions, Integrated Data Transmission Analyzer which is used for measuring the error rate of data communication and for the analysis of line faults and their causes for the routine maintenance testing of 2M systems, N×64 k communication channels, and Handheld E1 Bit Error Rate Tester which is an ideal device for fast problem resolution, E1 PCM line access, maintenance and acceptance testing.

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This easy-to-use xDSL tester, model A0010005, features a portable handheld design with strap and operates under Windows CE operating system. The xDSL tester evaluates line quality, performs PPPoE dial-up, provides Web page browsing and emulates a PC+ Modem in order to test the connection to the ISP. It also performs LAN tests including net-card property, PPPOE dial, Web browsing, fixative IP scanning, FTP Client and Web page speed test and DMM tests including loop resistance, capacitance, insulation resistance and voltage.

This xDSL tester provides a maximum test distance of up to 6.5 km and has a large memory capacity of 20 M to save ADSL test records and other data which is transferable through the USB port and LAN. Its embedded software can be upgraded to the latest version via USB or LAN. It conducts Ping, IP config, route and tracert tests. It also emulates a computer to test broadband IP lines or initiate PPPoE dial-up to test IP network connection and troubleshoot modem or computer problems. In addition, it is equipped with a TFT true color LCD with a touch screen which allows for convenient operation and clear display of test results. Powered by a rechargeable 7.4 V 2400 mAh Li-ion battery, this tester can work up to 8 hours.

This portable xDSL tester belongs to GAO’s family of ADSL testers. Featured products in this line include Portable ADSL2+ Tester which tests the physical layer, network layer and lines in accordance with ADSL, ADSL2, ADSL2+ and Re-ADSL standards, Multi-function ADSL/ADSL2+ Tester which provides multiple test functions including upstream and downstream rate measurements, error counts, modem simulation and PING and Trace testing and Pocket Size Handheld ADSL2+ Tester which provides modem emulation, telephone call functions and line voltage indication.

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This 25 to 100 MHz bandwidth 2 channel digital storage oscilloscope, model A0110001, provides real-time sampling rates from 100 to 250 MSa/s and rise time from less than 14 ns to 3.5 ns. It is available in three different bandwidths of 25, 60 or 100 MHz and comes with 2 passive probes which are switchable between 1:1 and 10:1 input ratio. This unit can detect the average and peak values of a waveform and can store up to 5000 waveform points per channel.

The digital scope provides an autoscale function, multiple-waveform calculation function, FFT function and automatic settings function for fast set up. It offers advanced triggering functions including edge trigger, video trigger and alternate trigger. It uses RS232 or USB interfaces for data storage and printing. In addition, with the available battery, it can be used as a portable oscilloscope for up to 4 hours.

This portable digital scope belongs to GAO’s family of Portable Digital Oscilloscopes. The family includes a variety of digital oscilloscopes with different bandwidths and sampling rates such as 4 Channel Mini Digital Oscilloscope which is based on ARM cortex M3 (STM32F103VCT6) 32 bit platform and provides a real-time sampling rate of 72 MSa/s with integrated FPGA and high speed ADC, Portable Two Channel 100 MHz Digital Oscilloscope which has 100 MHz bandwidth and 4 k memory depth per channel and Handheld Digital Storage Oscilloscopes which cover bandwidths from 25 MHz to 200 MHz and provide real-time and equivalent sample rates respectively from 1 GSa/s to 25 GSa/s.

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This DDS function generator, model A0230007, has a highly accurate and stable output. It is designed based on DDS (Direct Digital Synthesized) technology and can generate a variety of precise wave shapes over a frequency range of 40 µHz to 60 MHz. Its waveform length is 4 points to 16000 points and output waveforms include Sine, Square, Pulse and DC.

This DDS function generator has outstanding features including convenient data input via dial or numerical keyboard and protection against over voltage, over current, short circuit and reverse voltage. It provides stable output waveforms down to 1 mV with impedances of 50 Ω and has a high pulse duty cycle resolution of up to 0.1%. The generator can store 40 groups of settings. In addition, it includes both an RS-232 interface and a USB interface.

This easy-to-use DDS function generator belongs to GAO’s family of Logic Analyzers and Generators. This line also consists of Digital RF Millivoltmeter and Frequency Counter which utilizes a new kind of micro-controller and measures sinusoidal signal voltage over a wide frequency range of 10 kHz to 2000 MHz and DDS Function Generator with Arbitrary Waveform Function which is designed for use in such applications as communication equipment and electronic components production. GAO’s family has provided the users a lot of featured products with good quality, competitive price and good service and is well accepted by most customers in North America.

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Toronto, Canada – GAO Instruments

This digital fiber fusion splicer, model C0210002, features single X or Y view and simultaneous X and Y views, a short splicing time of 9 seconds and an impressive tube heating time of 30 seconds. It detects cleaved fiber end-face faults and adjusts parameters automatically. Equipped with a 5.6 inch color LCD screen, it displays the cleaved fiber and offset angle and core and clad offset clearly.

This compact fiber fusion splicer has a USB interface for data communication and software upgrades. It has a fiber cleave length of 8 mm to 16 mm with coating diameter of 250 µm. It is equipped with a large capacity battery which typically runs 160 cycles. In addition, it is shock resistant and has an intelligent menu design.

This digital fiber fusion splicer belongs to GAO’s family of Fusion Splicers. This line also includes Fiber Fusion Splicer which automatically adjusts to environmental conditions using built-in temperature, humidity and pressure sensors which provide constant feedback signals to control the fusion arc temperature. GAO Instruments Inc. provides the users large choices of effective RFID software and RFID solutions compatible with featured products. It is well accepted by customers all over the world such as Canada, United States, UK, Australia and Italy, etc.

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Toronto, Canada – GAO Instruments

This optical talk set, model C0240001, carries out full-duplex communication with a high quality connection over an exceptional communication distance and has low background noise. Online communications are also available when used together with an optical clip-on coupler. It operates at a wavelength of 1310 nm or 1550 nm.

This high performance talk set provides a transmission distance of up to 80 km and an output power range from -5 to -7 dBm. FP- LD emitter and FC/PC optical connector are also provided. The modulation frequencies include 270 Hz, 1 kHz, 2 kHz and CW. It is powered by rechargeable battery providing 5 hours continuous operation and has an adaptor power supply as well. In addition, it provides a large back lit LCD display and low battery power indication.

This multi-function optical talk set belongs to GAO’s family of Optical Telephones. Another similar product in this line is High Performance Optical Talk Set which is equipped with advanced technology that allows for high speech quality, the ability to communicate over long distances and the ability to communicate during severe weather conditions. GAO has provided different kinds of Fiber Optic Instruments that can fulfill different demands.

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Toronto, Canada – GAO Instruments

This 8 bit digital storage oscilloscope, model A0110024, features mathematical functions, advanced triggering methods, FFT spectrum analysis and 32 automatic parameter measurements. It also has unique digital filter and waveform recording function. This oscilloscope covers bandwidths from 25 MHz to 200 MHz and provides real-time and equivalent sample rates respectively of up to 1 GSa/s to 25 GSa/s.

This high performance digital storage oscilloscope contains a maximum 2 M memory depth for better observation of the waveform detail, a 7 inch color TFT LCD as well as Windows-style interfaces and menus for easy operation. It is compatible with USB and RS232 interfaces and  provides a front panel print button for saving results or printing screen shots. In addition, this oscilloscope offers multifunctional dials and powerful shortcut keys which help users to save time in operation.

This digital storage oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. This line includes a wide variety of digital oscilloscopes with different bandwidths such as 4-Channel Mini Digital Oscilloscope which is based on ARM cortex M3 (STM32F103VCT6) 32 bit platform and provides a real-time sampling rate of 72 MSa/s with integrated FPGA and high speed ADC, Handheld Digital Storage Oscilloscope which covers bandwidths from 25 MHz to 200 MHz and provides real-time and equivalent sample rates respectively from 1 GSa/s to 25 GSa/s and Portable 2 Channel 100 MHz Digital Oscilloscope which has 100 MHz bandwidth and 4 k memory depth per channel. It boasts a real-time sampling rate of 250 MS/s and an equivalent sampling rate of 50 GS/s.

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Toronto, Canada – GAO Instruments

This compact telecom line tester, model A0080003, features a compact size, low voltage warning, auto power off and an energy-saving design. The tester can perform multi-line as well as twisted pair testing. It can also be used to dial and has caller ID display. It is compatible with FSK and DTMF meeting the GB/T 15279-94 standard.

This simple-to-operate line tester has an insulation test range of 0 to 40 MΩ at a maximum distance of 2 km. It is configured with a large high resolution LCD screen to display line voltage and insulation test results and a chargeable 9 V Ni-MH battery.

This compact telecom line tester belongs to GAO’s family of Telecom Line Testers. This line contains three similar testers that can satisfy the consumers’ needs. Two featured products in this line are TDR Cable Fault Locator model C0080001, which is ideal for localization of breaks, shorts, poor electric insulation and other faults of various telephone cables, RF cables and coaxial cables and TDR Cable Fault Locator model C0080002, which utilizes pulse reflection and intelligent bridge technologies and offers a full testing length of 9999 m.

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Toronto, Canada – GAO Instruments

This pen style optical visual fault locator, model C0280004, is commonly used in quickly verifying continuity, checking the validity of patch cables and locating faults in both single mode (SM) and multimode (MM) optical fibers.

This meter features pen-shaped design, small size and easy to carry. Powered by two 1.5 V AA alkaline batteries, it can operate for up to 80 hours with modulated light and up to 50 hours with continuous light.

This optical visual fault locator belongs to GAO’s family of Visual Fault Series which contains three similar products that is suitable for network maintenance. One is Rugged Handheld Visual Fault Locator which is widely used for fiber optic network maintenance in telecommunications and CATV systems and can be used for locating break points which an OTDR did not find. Another is Handheld Visible Laser Source which is used to find fiber faults and is suitable for single mode and multi mode fiber. It uses visible red light to indicate the location of fiber faults from a macro bend point, break, problem coupler or connector or a mechanical splice that is not well aligned.

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Toronto, Canada – GAO Instruments

This compact and easy-to-carry fiber optic multimeter, model C0260004, integrates both an optical power meter module and an optical light source module in one unit and performs closed-loop tests by using both modules. Each module can also function individually. It features multi-wavelength measurement, power meter and stable light source. It also allows for a variety of configurations.

Calibrated wavelengths include 850nm, 980nm, 1300nm, 1310nm and 1550nm are available. It is available for optical connectors including FC, PC as well as interchangeable SC/ST. Powered by a rechargeable battery and power supply adaptor; this handheld multimeter can work continuously for 4 hours under both power meter and light source function modes, or work continuously for 28 hours for power meter function only. In addition, it is designed with an auto-off function and can cut off the power if no activity occurs for more than 10 minutes.

This handheld fiber optic multimeter belongs to GAO’s family of Power Meter which includes a series of similar products that can fulfill different requirements. A featured product is Handheld Optical Power Meter which is commonly used in the testing of fiber optic networks and for CATV installation and maintenance, LAN and WAN testing and quality assurance and acceptance testing. Another advanced one is Handheld PON Power Meter which is a useful tool for the construction and maintenance of the PON networks..

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Toronto, Canada – GAO Instruments

This optical cable routing detector, model C0290001, can identify a target pipeline from multiple pipelines. And different locating modes and functions are used to improve measurement efficiency. It operates at dual frequencies of 480Hz and 31Hz to meet different needs and provides multi transmit modes including injection method, inductance method and clamp method. Injection method provides a maximum distance of pipeline routing of up to 10 km. Inductance method has a maximum pipeline routing distance of up to 3 km and clamp method offers a maximum distance of up to 6 km.

This optical cable route detector measures pipeline depth of burial at a maximum of up to 4.5 m with a measurement accuracy of ±0.05 h ± 5 cm. It also features automatic gain adjustment, pipeline state detection and has a low battery indicator.

This optical cable route detector belongs to GAO’s family of Fiber Optic Instrument. This line can be divided into many categories such as Fusion Splicer, Light Source, and Optical Telephone, and so on. A featured product in fusion splicer category is Digital Fiber Fusion Splicer which is an ideal tool for construction and maintenance of fiber and cable in both field and laboratory applications. Another product is Multi-Function Optical Talk Sets in optical telephone category which is widely used in installation, optical testing, and maintenance and fiber attenuation value testing in data, CATV and telecommunication networks. A lot of other products are also available for the user’s requirements.

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Toronto, Canada – GAO Instruments 

This compact and easy-to-use optical light source, model C0220004, offers high accuracy and reliability for evaluating a wide range of optical devices and systems including WNM. It features 1 to 4 output wavelengths including 650 nm red sources, 1310/1550 nm wavelengths for single mode fiber and 850/1300 nm wavelengths for multimode fiber to meet specific requirements. Other wavelengths are available to meet specific needs.

This high performance handheld fiber optic light source operates at two frequencies: CW, 2 Hz modulation output at 650nm and CW, 270 Hz, 1 kHz, 2 kHz modulation output at other wavelengths. It is powered by 3 AA 1.5 V Alkaline batteries which allows for a very long continual operation time of up to 45 h. Its optional auto-off function will make the instrument deactivated after 10 minutes of the idle time ensuring a long battery life.

This handheld fiber optic light source belongs to GAO’s family of Light Source which includes a lot of similar products that the user need. Another featured and advanced product is Handheld Optical Power Multi Meter which integrates an optical source and optical power meter into one device and has a large memory capacity up to 200 groups test data. A series of similar instruments such as Portable Fiber Optic Visual Light Source, Handheld Laser Source and Handheld Adjustable Light Source all have various functions that the user may need.

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Toronto, Canada – GAO Instruments

This direct digital synthesis (DDS) arbitrary function generator and counter, model A0230002, features convenient data input via knob or numerical keyboard and remote SCPI compatible program-control via RS232, GPIB, and USB interfaces. It implements continuous phase adjustment function in trig mode. It also allows for the arbitrary setting of AM modulation from 1% to 120% and the setting of start and end frequency for frequency scan output.

The DDS arbitrary function generator and counter boasts high pulse duty ratio resolution of up to 0.001, high resolution and accuracy of digital FM and 0.1° phase adjustment resolution. It provides standard or internal storage of 27 fixed waveforms and 8 to 16000 configurable memory points for arbitrary waveforms. In addition, the generator can store and recall 10 groups of settings.

This DDS arbitrary function generator/counter belongs to GAO’s family of Logic Analyzers and Generators. This line also includes Digital RF Millivoltmeter and Frequency Counter which utilizes a new kind of micro-controller and measures sinusoidal signal voltage over a wide frequency range of 10 kHz to 2000 MHz, Radio Frequency Signal Generator which features AM and FM modulation functions, Digital Function Generator and DDS Function Generator which is used in development, testing and repair of electronic equipment. The line of products is generally used in designing, testing, troubleshooting, and repairing electronic or electro acoustic devices.

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Toronto, Canada – GAO Instruments

This multi-function ADSL2+ tester, model A0010003, operates under the Windows™ CE platform. It features a compact size, rugged design with jacket protector and simple operation. It performs line parameter measurements, error counts, line error, digital multi meter (DMM) test functions, modem simulation, ping and trace testing and Web site browsing. It has a maximum transmission distance of 6.5 km and carries out measurements immediately with a simple push of the “Auto Test” key. This powerful tester is also used as a digital multi-meter to test subscriber telephone connectivity and line parameters.

This easy-to-use ADSL 2+ tester offers auto-off functions for energy-saving and various voice alarms and LED indicators. It is equipped with a large storage volume, and test results can be uploaded, saved and printed through the embedded software which is upgradable via an integrated Ethernet or USB interface. In addition, it has a bracket stand for easy use.

This ADSL 2+ tester belongs to GAO’s family of ADSL Testers. This line also includes Multi- function handheld xDSL tester which is designed to test and analyze VDSL2, ADSL, ADSL2 and ADSL2+ networks, Multi-function ADSL/ADSL2+ Tester which provides a test solution for ADSL, ADSL2, ADSL2+, and RE-ADSL installation, maintenance and measurement, Pocket Size Handheld ADSL2+ Tester which is an ideal tool for ADSL/ADSL2+ network installation, maintenance and fault elimination and other similar products.

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Toronto, Canada – GAO Instruments

This multi-function ADSL2+ tester, model A0010007, features easy menu operation, ISP login, IP Ping tests, auto shut off function and audio and LED alarm indications. It performs xDSL line testing for ADSL, ADSL2, ADSL2+ and Re-ADSL. Aside from providing xDSL and dial testing, the tester also functions as a digital multi-meter (DMM). It also provides modem emulation, telephone call functions and line voltage indication.

This handheld ADSL2+ tester is compliant with all known DSLAMs. It has a memory capacity to store up to 50 records. It communicates with a computer through an RS232 interface. In addition, its internal rechargeable 2800 mAH Li-Ion battery allows for 4 to 5 hours of continuous operation.

This pocket size handheld ADSL2+ tester belongs to GAO’s family of ADSL Testers. This line includes a wide variety of testers such as portable ADSL2+ tester which has been widely used by ADSL business operators and Multi-function Handheld xDSL Tester which is designed to test and analyze VDSL2, ADSL, ADSL2 and ADSL2+ networks. This line also includes other similar ADSL testers such as Portable xDSL Tester and Multi-function ADSL/ADSL2+ Tester.

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Toronto, Canada – GAO Instruments

This portable CATV/QAM analyzer, model A0N00014, operates at a frequency range of 5 to 1000 MHz. It offers a fast spectrum analysis function, CM statistic function, Ping function and bandwidth testing function. It also features auto/limit test function and channel and spectrum scanning.

The compact analyzer runs under Linux operating system and has a built-in Web browser. It communicates with a computer via a USB port for simple data communications and storage. Its cable modem testing mode is compatible with DOCSIS 1.X, 2.0 and 3.0. It is powered by a 4.8 V 2.1 Ah rechargeable battery providing more than 6 hours continuous operation when fully charged.

This handheld CATV/QAM analyzer belongs to GAO’s family of CATV Meter & Instrument. This line of products includes Digital Signal Level Meter which is specially designed for use in the maintenance of digital, analog, FM or bilateral networks, TDR Cable Fault Locator which automatically locates and indicates the distance to many kinds of RF cable faults such as short circuits, open circuits or high resistance points, and Portable PCM Channel Analyzer which is widely used to measure PCM devices, digital switches, carrier wave communication devices and VoIP devices.

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Toronto, Canada –

This portable xDSL tester, model A0010005, operates under Windows CE operating system. It provides xDSL tests such as physical layer tests, modem parameter setting tests, PPPOE properties, PPPOE dial-up, network layer tests and loop back test. It also performs LAN tests including net-card property, PPPOE dial, Web browsing, fixative IP scanning, FTP Client and Web page speed test and DMM tests including loop resistance, capacitance, insulation resistance and voltage. The XDSL tester emulates a PC+ Modem in order to test the connection to the ISP.

This portable tester provides a maximum test distance of up to 6.5 km and features DSL line self-identification connection. It has a large memory capacity of 20 M to save ADSL test records and other data which is transferable through the USB port and LAN. Its embedded software can be upgraded to the latest version. A TFT true color LCD with a touch screen allows for convenient operation and clear display of test results.

This portable xDSL tester belongs to GAO’s family of ADSL testers. This line includes a wide variety of testers. Featured products in this line include Multi-function Handheld xDSL Tester which is designed to test and analyze VDSL2, ADSL, ADSL2 and ADSL2+ networks, Portable ADSL2+ Tester which provides such test functions as upstream and downstream rate measurements, error counts, modem simulation, PING and Trace testing, and Multi-function ADSL/ADSL2+ Tester which provides a test solution for ADSL, ADSL2, ADSL2+, and RE-ADSL installation, maintenance and measurement.

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Toronto, Canada –

This easy-to-operate E1/Ethernet tester, model A0050004, has PPPoE, FTP download, terminal emulation and Web browsing functions. It also provides a large number of Ethernet diagnostic tools including PING, router trace, a port location tool and a loop-back tool, thus it can meet most cases of Ethernet wiring tests and bandwidth verification.

This portable E1/Ethernet tester allows both on-line tests and off-line loopback and end-to-end tests. It tests throughput, latency, package loss rate and back to back buffer frames and checks network performance indexes. Statistics for Tx/Rx frames, utilization rate, error frame, different length frame, VLAN frame, suspension frame, broadcast frame are available. The E1/Ethernet tester features efficient data management and allows for simple copy, check, deletion and exporting of tested data. It integrates V series data interfaces and RS232 interfaces for data exchange. The E1/Ethernet tester boasts a large 2G data storage SD card, a rugged dustproof design and a color HD touch screen.

This E1/Ethernet tester belongs to GAO’s family of E1 Service Testers. The family also includes E1/Datacom Transmission Analyzer which is designed for performing comprehensive analysis, measurement and evaluation of telecom networks, PCM Channel Analyzer which integrates an analog signal generator/receiver, a selective level meter, a BERT, a signaling generator/receiver, a ring generator/identifier, a Dialer, a DC loop circuit (ICT, OGT), a balanced bridge and a reflecting bridge and other functions into a single instrument.

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Toronto, Canada –

This easy-to-use earth resistance tester, model A0E10002, provides a self-check function and automatic frequency control (AFC) function which minimizes interference. It performs on-line measurement, serial testing, and tests the RMS of leakage current and the soil resistivity with high accuracy. The earth resistance tester allows an earth resistance range from 0 to 19.99 kΩ and a leakage current measurement range of 0.0 to 19.9 A. It has a memory capacity of 250 groups and communicates with a computer for data uploading. It is powered by 6 V DC, 4 × 1.5 V AA alkaline dry battery or 4.8 V DC, 4 × 1.2 V AA Ni-MH rechargeable battery.

This intelligent double clamp earth resistance tester belongs to GAO’s family of Earth Ground Testers. The similar product in the line is Single Clamp Earth Tester which goes beyond the limitations of traditional methods of earth resistance testing as it does not require the disconnection of the ground wire. This line of products also includes Handheld Earth Ground Tester and Portable DC Ground Fault Locator which are widely used in detecting reliable ground connections and measuring earth ground resistance.

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Toronto, Canada – GAO Instruments

This portable fiber optic visual light source, model C0220002, when used together with GAO Instruments’ portable optical fiber identifier (model C0230002) provides an economic and efficient solution for measuring optical loss in fiber optic cable. It offers 1 to 6 wavelengths of highly stable output including 650 nm visible red light, 1310/1550 nm wavelengths for single mode fiber and 850/1300 nm wavelengths for multimode fiber. Other optional wavelengths are available. This rugged fiber optic visual light source operates at modulation frequencies that include CW, 2 Hz modulation output at 650 nm and CW, 270 Hz, 1 kHz, 2 kHz modulation output at other wavelengths. Its simple operation, highly efficient optical loss measurement, long operation time and durable housing make it one of the most popular choices among similar products on market.

This portable fiber optic visual light source belongs to GAO’s family of Light Source. This line includes a wide variety of light source to meet customers’ different needs. Some similar products are offered for selection such as Handheld Adjustable Light Source which provides 1 to 4 wavelengths and its output power is adjustable according to customer’s specific need, Compact Optical Laser Source which conducts efficient tests relying on its utilization of automatic power control (APC) and automatic temperature control (ATC) techniques, and Handheld Fiber Optic Light Source which offers high accuracy and reliability for evaluating a wide range of optical devices and systems including WNM.

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Toronto, Canada – GAO Instruments

This handheld optical power multi meter, model C0260001, conducts absolute and relative power tests, optical loss tests for fiber optic cable and passive optical devices. It also performs loop tests and two-way automatic testing. The laser source module operates at dual wavelengths of 1310 nm ± 20 nm and 1550 nm ± 20 nm while the optical power meter module works at a wavelength range from 800 to 1600 nm and can automatically identify frequencies including 270 Hz, 1 kHz, and 2 kHz.

This optical power multi meter features multi wavelength precise measurement, simple button operation, real-time clock function, single ended dual wavelength output, low voltage warning, auto power off and energy-save design. It has a large memory capacity which can store up to 200 groups test data. Multi adapters are available for all common connector types including FC, SC, ST, and LC.

This handheld optical power multi meter belongs to GAO’s family of Power Meters. This line includes a wide variety of power meters such as Fiber Optic Multimeter which is widely used in maintenance in telecommunication, CATV and in fiber optic lab testing, Handheld Optical Power Meter which offers a quick and accurate testing solution for both single and multi-mode fibers.

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Toronto, Canada – GAO Instruments

This digital storage oscilloscope, model A0120006, operates at 170 MHz bandwidth and supports up to 512 universal trigger levels. It features a 5-in-1 design, that is, it integrates a digital oscilloscope, a logic analyzer, a FFT spectrum analyzer, an electronic counter and a clock Jitter analyzer into one device.

The module efficiently solves complicated trigger problems by providing a comprehensive set of triggers such as rising or falling edge, pulse width, delayed and count. It provides a maximum repeat sampling rate of 20 GS/s and single shot sampling rates of up to 1 GS/s. The DSO has 4 M/8 M sampling data acquisition buffers on each channel and boasts a Fast Fourier Transformations (FFT) function for bandwidth tests. This digital storage oscilloscope also provides a precision 125 MHz frequency counter, multi-window software, optional DLL libraries, and up to 7 digital resolutions at 1 M memory for each analogy channel as well as convenient timing state display for logic debug.

This digital storage oscilloscope belongs to GAO’s family of USB PC Based Oscilloscopes. GAO’s USB PC Based Oscilloscope combines a high performance PC based digital storage oscilloscope (DSO), two/four 8 bit channels, 80MHz bandwidth, 250MSa/s sample rate, and 256K/512K/1Mega sample memory buffer with an eight/sixteen 250MHz channels’ logic analyzer and an FFT spectrum analyzer. The family’s digital oscilloscopes include 100 MHz USB PC Based Oscilloscope, 40 MHz USB PC Based Oscilloscope and 60 MHz USB PC-Based Oscilloscope. The oscilloscopes are commonly used for the maintenance of electronic equipment and laboratory work in fields such as science, medicine, engineering and telecommunications.

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Toronto, Canada – GAO Instruments

This SDH/PDH transmission analyzer, model A0020005, performs on-line and off-line tests of T1, E1, E2, E3, E4, DS1, DS3, STM-1 (155M), STM-4 (622M), and STM-16 (2.5G). Performance analysis conforms to ITU-T G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. Multiple tasks can be created and deleted dynamically. Its various functions also include automatic tributary scanning, automatic protection switching (APS), round trip delay measurement, TCM serial monitoring, timing and synchronization testing and real-time optical power testing.

This transmission analyzer features flexible, software-definition, simulated LED for current and historical error indication. In addition, this analyzer has a large memory capacity to record bit error and alarm events that can be displayed in charts and graphics. Test results can be saved as HTML or TXT format or uploaded to U-disk or PC for further analysis, reporting and printing.

This portable SDH/PDH transmission analyzer belongs to GAO’s family of E1 BER testers. This line also includes E1/T1 BER Tester and Data Transmission Analyzer which performs error code testing at the rate of 50 b/s to 2048 kb/s and offers 2M online monitoring for routine maintenance, repair and operations monitoring of communication equipment, Multi-functional E1/Datacom Tester which performs channel tests, alarm analysis, fault location and signal analysis, Handheld E1 Bit Error Rate (BER) Tester and other similar testers.

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Toronto, Canada – GAO Instruments

This 2 channel digital storage oscilloscope, model A0110001, features 20 types of automatic measurements. It is available in three different bandwidths of 25, 60 or 100 MHz and comes with 2 passive probes which are switchable between 1:1 and 10:1 input ratio. This unit can detect the average and peak values of a waveform and can store up to 5000 waveform points per channel.

The series of digital storage oscilloscopes provide real-time sampling rates from 100 to 250 MSa/s and rise time from less than 14 ns to 3.5 ns. The digital scope provides an autoscale function, multiple-waveform calculation function, FFT function and automatic settings function for fast set up. It offers advanced triggering functions including edge trigger, video trigger and alternate trigger. In addition, this portable digital scope uses RS232 or USB interfaces for data storage and printing.

This portable digital scope belongs to GAO’s family of Portable Digital Oscilloscopes. The family includes a variety of digital oscilloscopes with different bandwidths and sampling rates such as 4-Channel Mini Digital Oscilloscope which is ideal for common electronic engineering tasks , Dual Channel Portable 60 MHz Digital Oscilloscope , Handheld 2 Channel 60 MHz Digital Oscilloscope/DMM and some other similar products.

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Toronto, Canada – GAO Instruments

This easy-to-use USB PC-based logic analyzer, model A0220001, combines the functions of a multi-channel oscilloscope and other automatic testing instruments into one unit. It is capable of measuring 34 channels at 500 MHz and allows for simultaneously observing a sizeable amount of data and data flow direction control information. It identifies error conditions and locates faults in the source code.

The logic analyzer features a variety of digital information capture functions, Burr-detection ability, a large memory capacity, and multiple trigger modes. It has a delay function to capture the waveforms prior to or behind the required observation points. Intuitive and flexible displays return dynamic analysis results in binary, decimal, hexadecimal or ASCII format to facilitate debugging. The analyzer has an input voltage range of -60 to 60 V and a logic threshold range from -6 to 6 V. Inputs include TTL, LVTTL, CMOS, LVCOMS, ECL, PECL and EIA. In addition, the analyzer operates under Windows 2000, Windows XP, VISTA systems and is controlled and powered via USB2.0 interface.

This USB PC-based logic analyzer belongs to GAO’s family of Logic Analyzers and Generators. Some featured products in the family are Digital RF Millivoltmeter and Frequency Counter, DDS Function Generator, and DDS Function Generator with Arbitrary Waveform Function which are generally used in designing, testing, troubleshooting, and repairing electronic or electroacoustic devices. The line of products is generally used in designing, testing, troubleshooting, and repairing electronic or electro acoustic devices.

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Toronto, Canada – GAO Instruments

This advanced function generator, model A0230006, uses direct digital synthesis (DDS) technology and generates a variety of precise wave forms including Sine, Square, and Pulse over a frequency range of 40 µHz to 5 MHz. It provides a stable output waveform down to 1 mV (50 Ω) and has a waveform length of 1024 points. Three burst modes are available including internal, external and single. This DDS function generator offers protection against over voltage, over current, short circuit and reverse voltage.

The generator ensures simple operation by providing a high resolution TFT LCD display, key operation for all function, menu display, and rotary dial adjustment. It includes both an RS-232 interface and a USB interface as standard. These interfaces can be used for remote control of all of the instrument’s functions and for storing instrument set-ups. The generator can store 40 groups of settings.

This reliable DDS function generator belongs to GAO’s family of Logic Analyzers and Generators. Some similar products are offered for selection such as DDS Function Generator (model A0230004),  DDS Function Generator (model A0230007) and DDS Function Generator with Arbitrary Waveform Function (model A0230008) which are designed for use in such applications as communication equipment and electronic components production.

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Toronto, Canada – GAO Instruments

This portable arbitrary waveform generator, model A0210001, operates over a frequency range of 0.1 Hz to 5 MHz at a resolution of 0.01 Hz. It has one channel of 8-bit arbitrary synchronized waveform output, two 8-bit input channels for counter/frequency measurement and external trigger input. It generates regular waveforms such as Sine, Square, Triangle, Saw-tooth, TTL, White Noise, Gaussian Noise, Trapezoid, Exponent and AM and FM signals. Parameters such as amplitude, frequency and offset are programmable.

Using DDS technology, it provides high frequency accuracy, high waveform resolution, high reliability and wide software compatibility. Shipped with both SDK and API, it can be easily integrated or embedded into other auto-measuring systems. In addition, this arbitrary waveform generator and frequency counter features USB interface and is bus-powered. It is compatible with Windows NT/2000/XP/Vista and Windows 7 operating systems. With DAC clock, it is 0 to 50 MHz continuously adjustable in step of 0.2 Hz.

This arbitrary waveform generator and frequency counter belongs to GAO’s family of Waveform Generators. Another product in this line is USB Arbitrary Function Generator which has one channel of 12-bit arbitrary synchronized waveform output, one 6-bit input channel for counter/frequency measurement and an external trigger input.

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Toronto, Canada – GAO Instruments

This pocket size digital oscilloscope, model A0110003, performs waveform storage and playback. It provides a real-time sampling rate of 72 MSa/s with integrated FPGA and high speed ADC.

This high performance digital oscilloscope has two signal generator sources including digital source and analog source. The analog outputs wave forms include Sine wave, Triangle wave, and Saw wave. It provides 4 input channels. CHA and CHB are analog inputs while the CHC and CHD are digital inputs. An internal 2 MB USB disk is used to store waveforms, user applications and for firmware upgrades. Scheme and source files are also open for application development.

This digital oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. This line includes a wide variety of digital oscilloscopes with different bandwidths such as Dual Channel Portable 100 MHz Digital Oscilloscope, Portable Digital Scope w/FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing, Handheld 2 Channel 60 MHz Digital Oscilloscope/DMM and other similar products.

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Toronto, Canada – GAO Instruments

This function generator, model A0230007, generates a variety of precise wave forms over a frequency range of 40 µHz to 60 MHz. It provides a sampling rate of 180 MSa/s and a waveform length of 4 to 16000 points. The generator output waveforms include Sine, Square, Pulse and DC as well as a full suite of analog modulation capabilities including AM, FM, FSK, PSK, ASK, pulse modulation, burst mode and linear sweep.

This versatile DDS function generator provides protection against over voltage, over current, short circuit and reverse voltage. It ensures simple operation by offering a high resolution TFT LCD display, key operation for all function, menu display, and rotary dial adjustment. It includes both an RS-232 interface and a USB interface as standard. These interfaces can be used for remote control of all of the instrument’s functions and for storing instrument set-ups. The generator can store 40 groups of settings.

This easy-to-use DDS function generator belongs to GAO’s family of Logic Analyzers and Generators. Some similar products are offered for selection such as DDS Function Generator (model A0230004), DDS Function Generator (model A0230006) and DDS Function Generator with Arbitrary Waveform Function (model A0230008) which are designed for use in such applications as communication equipment and electronic components production.

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Toronto, Canada – GAO Instruments

The A0110024 series high performance 8 bit digital storage oscilloscopes cover bandwidths from 25 MHz to 200 MHz and provide real-time and equivalent sample rates respectively of 1 GSa/s to 25 GSa/s. They provide mathematical functions, advanced triggering methods, FFT spectrum analysis and automatic parameter measurements. They have 32 measurement functions and offer such triggering functions as edge, pulse, video, slope and alternative.

With multifunctional dials and powerful shortcut keys save time. The DSOs have unique digital filter and waveform recording functions. They have a maximum 2 M memory depth, a 7 inch color TFT LCD for better observation of the waveform detail as well as Windows style interfaces and menus for easy operation. A front panel print button is provided for saving results or printing screen shots. Additionally, automatic settings functions are provided for fast set up.

This digital storage oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. This line includes a wide variety of digital oscilloscopes with different bandwidths such as Dual Channel Portable 100 MHz Digital Oscilloscope, Portable Digital Scope w/FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing, Handheld 2 Channel 60 MHz Digital Oscilloscope/DMM and other similar products.

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Toronto, Canada – GAO Instruments

Using Direct Digital Synthesis (DDS) technology, this function generator, model A0230004, is able to generate different types of electrical waveforms over a wide frequency range of 40 µHz to 40 MHz. It provides a sampling rate of 180 MSa/s and a waveform length of 4 to 16000 points.

This DDS function generator has outstanding features including convenient data input via dial or numerical keyboard and protection against over voltage, over current, short circuit and reverse voltage. It provides stable output waveforms down to 1 mV with impedances of 50 Ω and has a high pulse duty cycle resolution of up to 0.1%. Amplitude is variable between 1 mVpp to 20 Vpp from a high source impedance of 50 Ω. Waveform quality remains excellent over the full amplitude range. In addition, it includes both an RS-232 interface and a USB interface as standard. These interfaces can be used for remote control of all of the instrument functions and for storing instrument set-ups. The generator can store 40 groups of settings.

This easy-to-use DDS function generator belongs to GAO’s family of Logic Analyzers and Generators. A similar product in this line is DDS function generator used in development, testing and repair of electronic equipment. The line also includes DDS Arbitrary Function Generator/Counter which creates stable and accurate output signals, low distortion sine waves and a wide selection of standard and arbitrary waveforms, Radio Frequency Signal Generator which is widely used in research, development and production testing of AM/FM receivers, civil-band transceivers, radio remote-control toys and wireless telephones and Digital Function Generator.

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Toronto, Canada – GAO Instruments

This USB arbitrary function generator, model A0210002, operates over a wide frequency range of 0.1 Hz to 25 MHz. It generates regular waveforms such as Sine, Square, Triangle, Saw-tooth, TTL, White Noise, Gaussian Noise, Trapezoid, Exponent and AM and FM signals. It can read waveform data files produced by Tektronix oscilloscopes or Tektronix waveform editor software. Parameters such as amplitude, frequency and offset are programmable.

It has one channel for 12-bit arbitrary synchronized waveform output, one 6-bit input channel for counter/frequency measurement and an external trigger input. It also has a built-in 50 MHz frequency counter. This generator features full plug and play capability and a USB interface so no external power is required. It runs under multiple Windows OS including Windows NT/2000/XP/Vista and 7. In addition, this generator ships with both SDK and API and can be easily integrated or embedded into other auto-measuring systems.

This arbitrary function generator belongs to GAO’s family of Waveform Generators. This line also includes the featured product Arbitrary Waveform Generator and Frequency Counter which has one channel of 8-bit arbitrary synchronized waveform output, two 8-bit input channels for counter/frequency measurement and external trigger input.

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Toronto, Canada – GAO Instruments

This multi-function ADSL2+ tester, model A0010007, features easy menu operation, ISP login, IP Ping tests, auto shut off function and audio and LED alarm indications. It performs xDSL line testing for ADSL, ADSL2, ADSL2+ and Re-ADSL. Aside from providing xDSL and dial testing, the tester also functions as a digital multi-meter (DMM). It also provides modem emulation, telephone call functions and line voltage indication.

This handheld ADSL2+ tester is compliant with all known DSLAMs. It has a memory capacity to store up to 50 records. It communicates with a computer through an RS232 interface. In addition, its internal rechargeable 2800 mAH Li-Ion battery allows for 4 to 5 hours of continuous operation.

This pocket size handheld ADSL2+ tester belongs to GAO’s family of ADSL Testers. This line includes a wide variety of testers such as portable ADSL2+ tester which has been widely used by ADSL business operators and Multi-function Handheld xDSL Tester which is designed to test and analyze VDSL2, ADSL, ADSL2 and ADSL2+ networks. This line also includes other similar ADSL testers such as Portable xDSL Tester and Multi-function ADSL/ADSL2+ Tester.

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Toronto, Canada – GAO Instruments

The multi-function communication cable fault tester, model A0080002, shortens troubleshooting time, reduces potential errors and improves work efficiency. The fault locator is widely used to accurately locate faults in the field, for acceptance and maintenance of lines, inspection of cable electrical characteristics and detection of faults such as breakage, misconnection, water absorption, and poor insulation.

GAO Instruments’ communication cable fault tester utilizes digital automatic gain control and digital automatic impedance balance technology for waveform visualization. It features safe operation under high voltage conditions, rapid automatic bridge, long operating time, precision soldering allowing for SMT pin distance of only 0.55 mm, and intelligent power supply switch mode. It is protected against over-voltage, over-current, short-circuit and power reverse connection. All of the above features make it one of the most popular communication cable fault testers on the market.

This multi-functional communication cable fault tester belongs to GAO’s family of Telecom Tester and Analyzer. Some featured products in this line are Portable ADSL2+ Tester, Handheld Portable Gigabit Ethernet Tester, and Portable E1/Datacom Transmission Analyzer which is designed for performing comprehensive analysis, measurement and evaluation of telecom networks.

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Toronto, Canada – GAO Instruments

This portable easy-to-use PC based oscilloscope, model A0120001, operates at a real-time sampling rate of up to 100 MS/s and 40 MHz bandwidth. The digital oscilloscope has 23 measurement functions and PASS/FALL checking functions. It has auto, normal and single triggering modes and the triggering level is adjustable. The USB PC based oscilloscope has FFT spectrum analysis and displays waveform average, persistence, intensity, invert, addition, subtraction, multiplication, division and X-Y plot. It boasts four adjustable vertical modes including CH1, CH2, Dual and ADD. Waveforms can be saved in text, MS Word, Excel or graphic files (JPG or BMP) formats under most Windows OS. In addition, it is compatible with USB 2.0 and requires no external power.

This 40 MHz USB PC-based oscilloscope belongs to GAO’s family of USB PC Based Oscilloscopes. Other models in this line include 60 MHz USB PC Based Oscilloscope, 100 MHz USB PC Based Oscilloscope, and Digital Storage Oscilloscope.

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Toronto, Canada – GAO Instruments

This portable digital oscilloscope, model A0110019, has 150 MHz bandwidth and offers up to 250 MS/s real-time sampling rate and 50 GS/s equivalent sampling rate with a memory depth of 4 k per channel. The scope features automatic parameter measurements and has +, -, ×, ÷ mathematical functions and advanced triggering methods including edge, video, pulse and display. It also performs FFT spectrum analysis including Hanning, Hamming, Blackman and rectangular.

The scope has high/low pass, band pass and band-stop digital filters. It has a rise time of 2.3 ns, a vertical sensitivity from 2 mV/div to 5 V/div with a vertical resolution of 8 bits and a time base range from 2 ns/div to 50 s/div. It communicates with a computer via USB and can store 10 waveforms and 10 setups.

This easy-to-use dual-channel digital oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. The line includes a variety of digital oscilloscope with different bandwidth and sampling rates such as Dual Channel Portable 100 MHz Digital Oscilloscope, Dual Channel Portable 25 MHz Digital Oscilloscope, Portable Dual Channel 200MHz Digital Oscilloscope and Dual Channel Portable 60 MHz Digital Oscilloscope.

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Toronto, Canada – GAO Instruments

This user-friendly function generator, model A0230001, operates at a frequency range of 0.3 Hz to 3 MHz or 0.5 Hz to 5 MHz. It is embedded with standard functions such as TTL/CMOS/Ramp output, External Voltage Controlled Frequency (VCF), and built-in 6-digit counter. The function generator features variable DC offset control, high resolution, INT/EXT AM/FM modulation, LIN/LOG sweep mode and Gate Controlled Voltage (GCV) output for synchronization.

The function generator also contains an attenuator and has the ability to automatically and repetitively sweep the frequency of the output waveform between two operator-determined limits. This capability makes it very easy to evaluate the frequency response of a given electronic circuit.

This powerful function generator belongs to GAO’s family of Logic Analyzers and Generators. Some featured products in this line are Arbitrary Waveform Generator and Frequency Counter, Digital RF Millivoltmeter and Frequency Counter , Radio Frequency Signal Generator, and DDS Function/Arbitrary Generator/Counter which utilizes direct digital synthesis (DDS) and VFD (visible vacuum fluorescent) techniques to create stable and accurate output signals with a wide selection of low distortion standard and arbitrary waveforms..

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Toronto, Canada – GAO Instruments

This handheld digital signal level meter, model A0N00009, operates over a frequency range of 5 to 870 MHz. It measures analog and digital channel power as well as quality measurements such as difference-carrying, MER (modulation error ratio), BER (bit error rate) and signal-to-noise ratio (SNR, S/N). This portable digital signal level meter performs auto channel spectrum scanning, limit testing and auto testing and also has functions such as single and multi-channel testing, and all-band scanning.

It allows direct entry of a channel or frequency and offers great flexibility in head-ends and distribution networks that employ narrow digital signals or non-standard frequency applications. This digital signal level meter boasts a bandwidth of 0.28 to 9.99 MHz and a signal level measurement range of 30 to 120 dBμV at a precision level of ±1.5 dB. It is able to analyze QAM 32 64 128/ITU-TJ.83 Annex A/B/C modulated signals and provides a spectrum analysis span of 6.25, 12.5, 25 and 62.5 MHz. It uses an RS232 interface or a USB port for data exchange. In addition, PC toolbox software and constellation diagram display are provided.

This easy-to-use digital signal level meter belongs to GAO’s family of CATV Meters & Instruments. This line of products includes CATV analyzers, digital signal level meters, PCM Channel Analyzers, Handheld Signal Level Analyzers and Handheld CATV/QAM Analyzer which features main functions of CATV, QAM and cable modem measurement.

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Toronto, Canada –

This full-featured network tester, model A0060002, integrates the functionality of both a Time Domain Reflectometer (TDR) and a Digital Multi- Meter (DMM) into one unit. It is designed for network layer testing including Ping, IPconfig, Tracert and Route, cable length testing, PPPOE dialing, attribute revision, and the performance of DMM tests and wiring diagram testing to validate cable link sequence.

The network tester performs DMM tests such as AC or DC voltage, loop resistance, line capacitance and line insulation.  It tests 4 pairs of non-shielded cables and 4 pairs of shielded cables including CAT5, CAT5E and CAT6. It can also test the cable length and locate breaks or and faults within a maximum distance of 150 m.

This handheld network tester offers fixative IP scanning and Web browsing for LAN test and has a memory capacity of 20 M to store test results. It can be powered by a rechargeable Li-ion battery or a 9.6 V DC adaptor. In addition, the embedded software can be upgraded to the latest version through LAN or USB.

This full-featured network tester belongs to GAO’s family of Network Testers. This line is suited for the installation and maintenance of networks and conducts network testing, cable testing and many other tests. The line includes Network Tester and Handheld Portable Gigabit Ethernet Tester which is an ideal tool for the front-line field workers to analyze the network quality and locate the fault rapidly. This family is ergonomically designed and easy to carry thus becomes an ideal choice for technicians.

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Toronto, Canada – GAO Instruments

This handheld fiber optic OTDR, model C0250001, features a compact size, easy operation, high dynamic range and high precise measurement. It is complete with adaptors for connection to different fiber types. It is also resistant to dust, moisture and shock, which allows it to perform well even in harsh environments.

This fiber optic OTDR performs testing in average and real time modes. It can be used in both single mode and multi mode fiber applications. It provides a wavelength of 1310/1550 nm ± 20 nm for single mode fiber and 850/1300 nm ± 20 nm for multi mode fiber. The event dead zone for single mode fiber is only 3 m and for multi mode fiber is 7 m.

The unique hot key design makes it convenient and quick to conduct, review and analyze test results. It has a large memory capacity to save up to 300 test curves and can transfer them to a computer via RS-232 or USB port for further analysis, reporting and printing via included software. In addition, it is powered by Ni-MH rechargeable battery or AC adapter for over 3.5  hours of continuous testing operation on a single charge.

This fiber optic OTDR belongs to GAO’s family of OTDRs. Another product in this line is multi-function optical time domain reflectometer which can be used for testing in a variety of fiber optic applications including WDM, MAN, FTTH and LAN network. This line of OTDRs is important test equipment used in fiber optic work. They are widely applied in the manufacture, construction and maintenance of optical fibers.

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Toronto, Canada – GAO Instruments

This professional digital function generator, model A0230001, offers adjustable sweep time and sweep width both in linear and logarithmic modes. It boasts external voltage controlled frequency (VCF) function; duty cycle control with signal inversion capacity, two-step and variable attenuator and a built-in 6 digit counter with INT/EXT function up to 100 MHz. Waveforms can be either repetitive or single-shot in which case some kind of triggering source is required.

Waveforms include Sine, Triangle, Square, Ramp, TTL and CMOS output. The function generator features variable DC offset control, high resolution, INT/EXT AM/FM modulation, LIN/LOG sweep mode and GCV output for synchronization. In addition, an oscilloscope may be connected to this instrument for output display.

This professional digital function generator belongs to GAO’s family of Logic Analyzer and Generator. The line includes DDS function generator or counter, Digital RF Millivoltmeter and Frequency Counter and Radio Frequency Signal Generator. This family provides an excellent tool for digital design verification and debugging. The family offers GAO’s customers various choices.

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Toronto, Canada – GAO Instruments

This handheld optical power multi meter, model C0260001, integrates an optical source and optical power meter into one device. The laser source module operates at dual wavelengths of 1310 nm ± 20 nm and 1550 nm ± 20 nm while the optical power meter module works at a wavelength range from 800 to 1600 nm.

This optical power multi meter features simple button operation, real-time clock function, single ended dual wavelength output, low voltage warning, auto power off and energy-save design.

It conducts absolute and relative power tests, optical loss tests for fiber optic cable and passive optical devices. It also performs loop tests and two-way automatic testing.

Its internal microprocessor and linearity magnification technology ensure long term calibration and test accuracy. It has a large memory capacity which can store up to 200 groups test data.

Additionally, multi adapters are available for all common connector types including FC, SC, ST, and LC.

This handheld optical power multi meter belongs to GAO’s family of Power Meters. This line includes a wide variety of power meters such as Fiber Optic Multimeter which is widely used in maintenance in telecommunication, CATV and in fiber optic lab testing, Handheld Optical Power Meter which is a compact and easy-to-use test instrument for fiber network installation, acceptance testing and maintenance and many other similar products.

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Toronto, Canada – GAO Instruments

This arbitrary waveform generator and frequency counter, model A0210001, operates over a frequency range of 0.1 Hz to 5 MHz at a resolution of 0.01 Hz. It generates regular waveforms such as Sine, Square, Triangle, Saw-tooth, TTL, White Noise, Gaussian Noise, Trapezoid, Exponent and AM and FM signals. Parameters, such as amplitude, frequency and offset are programmable.

The easy-to-carry waveform generator and frequency counter can read waveform data files produced by Tektronix oscilloscopes or Tektronix waveform editor software.

Using DDS technology, it provides high frequency accuracy, high waveform resolution, high reliability and wide software compatibility. Shipped with both SDK and API, it can be easily integrated or embedded into other auto-measuring systems

In addition, this arbitrary waveform generator and frequency counter features USB interface and is bus-powered. It is compatible with Windows NT/2000/XP/Vista and Windows 7. With DAC clock, it is 0 to 50 MHz continuously adjustable in step of 0.2 Hz.

This arbitrary waveform generator and frequency counter belongs to GAO’s family of Waveform Generators. This line also includes USB Arbitrary Function Generator which can directly read waveform data files produced by Tektronix oscilloscopes or Tektronix waveform editor software.

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Toronto, Canada – GAO Instruments

This optical visual fault locator, model C0280004, features a small, pen-shaped design and light weight. It has a 650 nm visible laser source that transmits continuous light or 1 Hz strobe light into a fiber allowing the user to visually detect a fiber fault over distances of up to 9 km.

This optical visual fault locator offers a standard 2.5 mm universal adapter. It is powered by two 1.5 V AA alkaline batteries and is easy for field operation.

The optical visual fault locator provides up to 50 hours of continuous operation when transmitting continuous light and operates continuously for up to 80 hours when transmitting modulated light.

This optical visual fault locator belongs to GAO’s family of Visual Fault Series. This line also includes Rugged Handheld Visual Fault Locator which is used for troubleshooting of both single-mode and multi-mode fiber optic cables, Handheld Visible Laser Source which is used to find fiber faults and is suitable for single mode and multi mode fiber, and Pen-style Visual Fault Locator which is specially designed for field personnel.

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Toronto

This compact fiber optic identifier, model C0230001, provides transmission direction display, multiple signal frequency identification including 270 Hz, 1 kHz and 2 kHz, and detachable InGaAs detectors. It offers an available wavelength range of 800 to 1700 nm.

Employing safe and reliable macro bending technology, it is able to avoid the disruption of network communications that would normally be caused due to the need to disconnect or cut the fiber optic cable for identification and testing.

Normal communications can be maintained while identifying the transmission direction, speed and relative signal strength on its 5-level display with only very small signal loss.

Apart from the above, its low-voltage indication, automatic shutdown and rechargeable lithium battery allows for more than 4 hours of continuous operation.

This compact fiber optic identifier belongs to GAO’s family of Optical Fiber Identifiers.This line also includes another similar product Portable Optical Fiber Identifier which is an essential tool in the installation and maintenance of fiber networks. This line of optical fiber identifiers is ideal for the maintenance of telecommunication and CATV systems and other fiber optics networks.

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Toronto, Canada – GAO Instruments

This portable digital oscilloscope, model A0110012, has 60 MHz bandwidth and offers up to 1 GS/s real-time sampling rate at a memory depth of 4 k per channel. It has a rise time of 5.8 ns, a vertical sensitivity from 2 mV/div to 5 V/div, and a time base range from 5 ns/div to 5 s/div. The digital oscilloscope boasts mathematical functions, advanced triggering methods, FFT spectrum analysis and automatic parameter measurements. It provides such advanced triggering modes as edge triggering, video triggering, pulse triggering and delay triggering. The FFT spectrum analysis includes Hanning, Hamming, Blackman and rectangular. And automatic parameter measurements include V_pp, V_amp, V_rms, V_max, V_min, V_top, V_base, V_avg, Freq, Period, Rise time, Fall time, +Width, -Width, Overshoot, Preshoot, +Duty and -Duty. In addition, this multi-function digital oscilloscope has high/low pass, band pass and band-stop digital filters.

This handheld channel digital oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. The family includes a variety of digital oscilloscopes with different bandwidths and sampling rates such as Dual Channel Portable 100 MHz Digital Oscilloscope which offers up to 250 MS/s real-time sample rate, Portable Digital Scope w/FFT which is commonly used for electronic circuit debugging, circuit testing, design and manufacture, education and training, automobile maintenance and testing, and Dual Channel Portable 25 MHz Digital Oscilloscope.

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Toronto, Canada – GAO Instruments

This handheld CATV analyzer, model A0N00017, operates over a frequency range of 5 to 870 MHz with a frequency step of 10 kHz. It has a level measurement range of 30 to 120 dBuv with ±1.5 dB precision for analog channels and a measurement range of 40 to 110 dBuV with ±2.5 dB precision for digital channels. The analyzer provides fast charging mode between safe and dependable. Test data and TV images are displayed simultaneously, conveniently and efficiently. It features unique interference immunity which allows it to operate stably even in environments with challenging EMI and has a memory capacity of 256 kB for data storage. Its rubber bumper and shock-resistant design provide extra protection in fieldwork. In addition, it communicates with a computer via an RS232 interface for data exchange.

This handheld CATV analyzer belongs to GAO’s family of CATV Meters & Instruments. This line of products includes TDR cable fault locator which is able to automatically locate and indicate the distance to many kinds of RF cable faults such as short circuits, open circuits or high resistance points, digital signal level meters, PCM channel analyzers, handheld signal level analyzers and QAM analyzers which are widely used for CATV signal testing and are intended for analog and digital television network construction and maintenance.

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Toronto, Canada – GAO Instruments

This digital RF millivoltmeter and frequency counter, model A0230003, is compact, portable and light weight and also consumes little power. It measures sinusoidal signal voltage over a wide frequency range of 10 kHz to 2000 MHz. The millivoltmeter and frequency counter is packed with outstanding features including rapid frequency response, a small standing wave coefficient, high sensitivity, accuracy, reliability and high price-to-quality ratio. It offers RS232, GPIB and USB interfaces for remote measurement and control. Additionally, it also workS in conjunction with a computer to form an automated test system.

This digital RF millivoltmeter and frequency counter belongs to GAO’s family of Logic Analyzers and Generators. The line of products also includes DDS Arbitrary Function Generator/Counter which creates stable and accurate output signals, low distortion sine waves and a wide selection of standard and arbitrary waveforms; Radio Frequency Signal Generator which is widely used in research, development and production testing of AM/FM receivers, civil-band transceivers, radio remote-control toys and wireless telephones and Digital Function Generator. The line of products is generally used in designing, testing, troubleshooting, and repairing electronic or electro acoustic devices.

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Toronto, Canada – GAO Instruments

This handheld visible laser source, model GAO A0870004, features low voltage warning, auto power-off, simple button operation and an energy-saving design. It uses visible red light to indicate the location of fiber faults from a macro bend point, break, problem coupler or connector or a mechanical splice that is not well aligned. It can distinguish the faults in fiber jumpers, jumper boards, distribution frames and tie-ins. Its working wavelength is 650 nm ± 20 nm. It offers FC, ST and SC adaptors. CW and 2 Hz alternative optical output modes are also available. This laser source overcomes the usual limitation of the dead zone of an OTDR to accurately detect fiber fault positions. In addition, it is powered by a 9 V/160 mAh NI-MH rechargeable battery which provides continuous operation of 8 to 10 hours.

This handheld visible laser source belongs to GAO’s family of Visual Fault Series. This line of products also includes a wide variety of visual fault locators such as Optical Visual Fault Locator, Pen-Type Visual Fault Locator and Rugged Visual Fault Locator which is widely used for fiber optic network maintenance in telecommunications and CATV systems.

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Toronto, Canada – GAO Instruments

This portable optical power meter, model A0850008, features self-calibration, low voltage warning, auto-off function and real-time data monitoring function. It is equipped with a built-in long wavelength camera probe. It operates over the wavelength range of 850 to 1700 nm and offers working wavelengths including 850 nm, 980 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm and 1625 nm. The meter performs power measurements within a test range of -70 to10 dBm and -50 to 26 dBm at an accuracy of ± 5%. It identifies frequencies of 270 Hz, 1 kHz, and 2 kHz automatically. It also boasts automatic reset and automatic range switching. Optical interfaces including FC, ST and SC are provided for selection. It has a large memory capacity of up to 1000 groups of data and uses an RS232 interface to upload data to a computer for further analysis.

This optical power meter belongs to GAO’s family of Power Meters. This line of power meters includes Fiber Optic Power Meter/Light Source, Handheld Optical Power Meter and other similar products. This line of products is very popular for CATV technicians and engineers.

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Toronto, Canada – GAO Instruments

This high-performance cable fault locator, model A0N00019, has a double cursor display to analyze test results. It tests cables of 25, 50, 75 and 100 ohm impedance over a long measurement range of 15 to 2000 m at accuracy of ±1 m ± 1%. This cable fault locator also provides an intuitive electronic map relevant to the time domain picture allowing the fault to be detected easily. Its 7.2 V 1.8 AH NI-MH battery allows for average 7 to 8 hours continuous operation on full charge. In addition, it can be connected to a computer for file upload and data analysis.

This high-performance cable fault locator belongs to GAO’s family of CATV Meters & Instruments. This line of products includes CATV analyzers, digital signal level meters, PCM channel analyzers, handheld signal level analyzers and QAM analyzers which are widely used for CATV signal testing and are intended for analog and digital television network construction and maintenance.

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Toronto, Canada – GAO Instruments

The signal level meter, model A0500013, operates over a frequency range of 46 to 870 MHz. It tests CATV signal levels in both channel and frequency modes. It also measures CATV TILT, C/N and trunk cable voltage parameters with high efficiency and accuracy. The meter scans 125 channels at the same time and has the ability to display 2 channels simultaneously. It provides a resolution bandwidth of 280 kHz ± 50 kHz and a level range of 30 to120 dBμV with an accuracy of ±1.5 dBµV at room temperature. The portable signal level meter offers a quick response time without requiring warm-up. In addition, it can be powered by both a DC 7.2 V/1.4 Ah rechargeable battery and AC 110/60 Hz to 220 V/50 Hz (±10%) and operates continuously for more than 5 hours on a single charge.

This handheld signal level meter belongs to GAO’s family of CATV Meters & Instruments. The line of products includes CATV analyzers, digital signal level meters, PCM channel analyzers, cable fault locators and QAM analyzers which are widely used for CATV signal testing and are intended for analog and digital television network construction and maintenance.

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Toronto, Canada – GAO Instruments

This RF signal generator, model A0230005, features a compact size, light weight and preset functions for simple operation. It is a highly accurate instrument with a wide frequency range of 300 kHz to 300 MHz. It offers an RF output range of -8 to 120 dBµ at a resolution of 0.1 dB. This signal generator performs both automatic and manual testing. In FM modulation, the distortion is less than 0.3%; while in AM modulation, the distortion is less than 0.65%. Both RS-232C and IEEE-488 (GPIB) interfaces are available for the generator. Using these interfaces, the instrument can be formed into an automatic test system under the control of a host computer together with other instruments. In addition, it has a storage memory of 100 points.

This multi-function RF signal generator belongs to GAO’s family of Logic Analyzers and Generators. The line of products also includes DDS Function /Arbitrary Generator/Counter which creates stable and accurate output signals, low distortion sine waves and a wide selection of standard and arbitrary waveforms; Digital RF Millivoltmeter and Frequency Counter which is an essential instrument for workshop production and laboratory ultra-high frequency voltage measurements and Digital Function Generator. The line of products is generally used in designing, testing, troubleshooting, and repairing electronic or electro acoustic devices.

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Toronto, Canada – GAO Instruments

This multi-function digital oscilloscope, model A0110018, has a bandwidth of 100 MHz, a rise time of 3.5 ns and provides 50 GS/s equivalent sampling rate. It has high/low pass, band pass and band-stop digital filters. It offers advanced triggering modes including edge, video, pulse and display and has +, -, ×, ÷ mathematic functions. The oscilloscope performs FFT spectrum analysis including Hanning, Hamming, Blackman and rectangular. It also conducts automatic measurement of parameters such as Vpp, Vamp, Vrms, Vmax, Vmin, Vtop, Vbase, Vavg, frequency, period, rise time, fall time, +width, -width, overshoot, preshoot, +duty and –duty. The scope uses a USB port for data exchange and can store 10 waveforms and 10 setups.

This dual channel digital oscilloscope belongs to GAO’s family of Portable Digital Oscilloscopes. The line of digital oscilloscopes includes a variety of digital oscilloscope with different bandwidth and sampling rates such as Dual Channel Portable 100 MHz Digital Oscilloscope, Portable Digital Oscilloscope, 100 MHz, 250 MSa/s, 2 channels, MONO, Portable Digital Oscilloscope, 150 MHz, 1 GSa/s, 2 channels, COLOR and Portable Digital Oscilloscope, 200 MHz, 1 GSa/s, 2 channels, COLOR.
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Toronto, Canada – GAO Instruments

This portable signal level analyzer, model A0500014, operates over a frequency range of 5 to 870 MHz. It can test CATV signal level in both channel (SCAN) and frequency (SPECTRUM) modes. In “SCAN” mode, it can scan up to 125 channels at a speed of 30 channels/min and store signal levels as well. In ‘SPECTRUM’ mode, the analyzer can carry out spectrum displays and tests within a certain frequency range. The analyzer measures CATV TILT, C/N and trunk cable voltage and has auto-off time setup, channel plan selection, channel amending, channel sorting and channel editing functions. It stores 24 groups of scanned data (up to 100 channels per group) and has two RF F-Type input ports. The rugged analyzer provides a level range of 30 dBμV to 120 dBμV. It can be powered by both DC 7.2 V/1.4 Ah rechargeable battery and AC 110/60Hz to 220 V/50 Hz (±10%) and works continuously for longer than 3.5 hours on a single charge.

This handheld signal level analyzer, GAO A0500014 belongs to GAO’s family of CATV Meters & Instruments. This family contains CATV analyzers, digital signal level meters, PCM channel analyzers, cable fault locators and QAM analyzers which are widely used for CATV signal testing and are intended for analog and digital television network construction and maintenance.

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Toronto, Canada – GAO Instruments

This handheld ADSL/ADSL2+ tester, model A0010006, features auto-off function, voice and LED status indicators and histogram analysis. By simply plugging the ADSL / ADSL2+ connections into the tester, test results and line parameter measurement are obtained with one push of the “Auto Test” key. Test results can be uploaded, saved and printed through the included software which is upgradeable via an integrated RS-232 interface. The tester has a 24 Mb/s downstream rate and an upstream rate of 1.2 Mb/s. It complies with ADSL, ITU G.992.3, ITU G.992.4, ADSL2+ and ITU G.992 Annex A, B, C, Annex L and Annex M line standards. The tester determines the type of an ADSL line being tested, automatically matches it to the ADSL line standard and then carries out tests accordingly. This portable tester has a maximum transmission distance of 6.5 km. In addition, the embedded chipset is upgradeable via Ethernet interface in order to remain current with any developments in the ADSL standard to protect your investment.

This easy-to-use ADSL/ADSL2+ tester belongs to GAO’s family of ADSL Testers. The line includes multi-function ADSL testers such as Multi- function handheld xDSL tester and pocket size handheld ADSL2+ tester.

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Toronto, Canada – GAO Instruments

This handheld network tester, model A0060002, boasts such functions as network layer testing, cable length testing, PPPoE dialing and attribute revising, DMM tests and wiring diagram testing which aims to validate cable link sequence. It conducts network layer tests such as Ping, IPconfig, Tracert, and Route, tests the cable length and locates breaks within a maximum distance of 150 m. DMM tests include AC or DC voltage, loop resistance, line capacitance and line insulation.  This network tester works with various types of shielded and non-shielded cables including CAT5, CAT5E and CAT6. It offers fixative IP scanning and Web browsing for LAN test. The embedded software is upgradable. This tester has a memory capacity of 20 M and users may download test results to a computer or a USB drive. In addition, it is powered by a rechargeable Li-ion battery providing 8 hours continuous operation and has a 9.6 V DC adaptor as well.

This high-performance network tester, GAO A0060002, belongs to GAO’s family of Network Tester. The family contains Handheld Portable Gigabit Ethernet Tester and Network Tester. This family is suited for the installation and maintenance of networks and conducts network testing, cable testing and many other tests. This family is ergonomically designed and easy to carry thus becomes an ideal choice for technicians.

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Toronto, Canada – GAO Instruments

This portable E1/Datacom tester, model A0020006, features a rugged and handheld design, simple operation and real-time clock. It offers such functions as in-service framed and unframed testing, frame data control and monitoring, time slot activity monitoring, CAS and CCS signaling generation, monitoring and extensive error and alarm generation, detection and indication. The tester saves and recalls ten user-defined setups and ten sets of results which can be uploaded and printed via included software. Its embedded software can be upgraded via an integrated RS232 interface. The full-featured E1/Datacom tester also has the functions of single and fixed rate error injection, manual and auto-timer measurement, ITU-T G.821, G.826, and M.2100 performance analysis and self-check and keyboard testing. It works continuously for up to six hours on a charge and can also be charged with an automobile battery adapter.

This pocket-size E1/Datacom tester, GAO A0020006 belongs to GAO’s family of E1/Datacom Tester. The family of testers also includes GAO A0020003, GAO A0020002 and GAO A0030001. They perform tests such as channel tests, alarm analysis, fault location, signal analysis and many other telecom tests. The family of E1/Datacom tester offers its customers valuable choices. The testers are very popular among telecom test engineers as a result of its functionality, portability and high performance.

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Toronto, Canada – GAO Instruments

This high-performance handheld digital signal level meter, model A0500035, operates over a frequency range of 5 to 870 MHz. It conducts measurements for digital-analog-mixed networks and performs Tilt, C/N, Voltage and V/A tests. This digital signal level meter offers a bandwidth of 0.28 to 9.99 MHz and a signal level measurement range of 30 to 120 dBµV at a level precision of ±1.5 dB. It is able to analyze QAM 32 64 128 256/ITU-TJ.83 Annex A/B/C modulated signals and provides a spectrum analysis span of 6.25, 12.5, 25 and 62.5 MHz. PC toolbox software and constellation diagram display are provided. This handheld digital signal level meter communicates with a computer via an RS232 interface or a USB port for data exchange.

This digital signal level meter belongs to GAO’s family of CATV Meter & Instrument. The family provides ideal solutions for the installation, maintenance and testing of CATV system such as digital, analog or bilateral networks. The line of products is very popular among CATV technical personnel and engineers.

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The easy-to-use PCM channel analyzer, model A0050003, provides flexible control, offering both auto and manual modes. It features touch operation, key-stroke operation, expanded mouse operation, analog and digital interfaces, and a convenient Windows GUI. Either equal step or customized frequency spots are selectable. Users can develop and design voice channel measurement and control systems under various conditions via USB or remotely through Ethernet interface. The high performance PCM channel analyzer compares the measured results with built-in standard ITU-T tolerance masks and evaluates whether the results indicate a pass or fail. It has a storage capacity of up to 100 groups of results and measurement configurations. Test results are shown graphically and can be uploaded to a computer where they can be further viewed, analyzed, assembled, filed and printed via embedded software which can be upgraded online.

This portable PCM channel analyzer belongs to GAO’s E1 Service Tester family of products. More advanced models in the family are GAO A0020003, GAO A0050004, and GAO A0040008. This family of test instruments offers valuable choices to their customers. The family is very popular among field engineers and technicians due to their testing accuracy, functionality, portability and affordability.

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Toronto, Canada – GAO Instruments

This handheld CATV analyzer, model A0500034, operates over a frequency range of 5 MHz to 870 MHz with a frequency step of 10 kHz and accepts both QAM and QPSK modulation types. The CATV analyzer has a level measurement range of 30 dBmV to 120 dBmv with ±1.5 dB precision for analog channels and a measurement range of 40 dBmV to 110 dBmV with ±2.5 dB precision for digital channels. It has a built-in speaker for audio output ensuring easy operation. This handheld CATV analyzer displays test data and TV images simultaneously and has a memory of 256 kB for data storage. It communicates with a computer via an RS232 interface for data exchange. Using a 14.4 V/2.1 AH chargeable Lithium battery for power supply, the analyzer can operate continuously for more than 4 hours on a single charge. In addition, this high performance CATV analyzer has a rubber bumper and shock-resistant design to provide extra protection in fieldwork.

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Toronto, Canada – GAO Instruments

This professional digital function generator, model A0400002, offers adjustable sweep time and sweep width both in linear and logarithmic modes. It boasts external voltage controlled frequency (VCF) function; duty cycle control with signal inversion capacity, two-step and variable attenuator and a built-in 6 digit counter with INT/EXT function up to 100 MHz. Waveforms can be either repetitive or single-shot in which case some kind of triggering source is required. Waveforms include Sine, Triangle, Square, Ramp, TTL and CMOS output. The function generator features variable DC offset control, high resolution, INT/EXT AM/FM modulation, LIN/LOG sweep mode and GCV output for synchronization. In addition, an oscilloscope may be connected to this instrument for output display.

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Toronto, Canada – GAO Instruments

This professional handheld telephone line tester, model A0080004, features low and high voltage warnings, compact size, simple operation, energy saving auto power off function and FSK/DTMF compatibility. It is ruggedly designed and made of high impact materials. It provides call display and last number redial, performs multi-line tests and wire pair check, and checks line insulation and tests for breaks. The insulation impedance ranges from 0 Ω to 10 MΩ. This telephone line tester contains a megaohm meter for testing insulation resistance and telephone capacitance. In addition, it provides DTMF complying with the GB/T15279-94 standard.

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Toronto, Canada – GAO Instruments

This high performance visible laser source, model A0630008, features a compact size, simple operation, low voltage warning and automatic power off for saving energy. The emitted red light shows where the fiber is seriously curved, covering breakage and nude fiber location, as well as poorly connected locations. It is useful for testing the blind spots of OTDRs. It is suitable for both single mode and multi-mode fibers. In addition, the practical visible fault locator uses FC, ST and SC adaptors. CW and 2Hz alternative optical output modes are also available.

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Toronto, Canada – GAO Instruments

This parallel data acquisition module, model A0710007, boasts a wide sampling rate ranging from 1 k to 40 M with a low inter-channel phase difference of less than 1°. It has a memory depth of 4 M/ch which can be extended to 8 M/ch or 16 M/ch and achieves ±40 mV to ±40 V voltage signal acquisition. This data acquisition module is equipped with two high-speed 40 M 12 bit ADCs and boasts two independent programmable gain channels. It features a compact size, stacked connection, DasView 2.0 analysis software system and easy to use bus drive. It allows for quick and easy data acquisition and control to be carried out using a computer. Additionally, this compact data acquisition module provides manual, external and internal triggering which is divided into triggering on rising edge and falling edge with adjustable triggering levels and performs highly accurate measurements with phase consistency.

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Toronto, Canada – GAO Instruments

This multi-function handheld xDSL tester, model A0010004, is capable of web browsing, web rate measurement and FTP speed measurement. It confirms whether a line is suitable for xDSL services and tests the physical, network and application layers at a high speed. Ethernet and cable tests can also be performed.Equipped with a PPPoE dial-up function, the tester can obtain an IP address and conduct Ping tests including Ping loss test and Ping loopback latency test. Critical line threshold parameters can be set and compared to real test results to determine service qualification automatically. The compact tester runs under Windows CE operating system and offers a graphical interface and a large memory capacity of up to 2000 ADSL test records. In addition, it has an auto-off function to save power, audio and LED status indication, and a large true color LCD screen with touch.

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Toronto, Canada – GAO Instruments

This handheld optical light source, model A0630009, used together with A0670007 optical power meter acts as a perfect solution for the fiber optic network characterization. It evaluates a wide range of optical devices and systems including WNM with high accuracy and reliability. It provides stable output wavelengths including 650 nm red source, 1310/1550 nm for single mode fiber and 850/1300 nm for multimode fiber. This optical light source offers CW, 2 Hz modulation output at 650 nm and CW, 270 Hz, 1 kHz, 2 kHz modulation output at other wavelengths. It has a typical output power of -7 dBm for LD and -20 dBm for LED with a high stability of ±0.05 dB/15 mins or ±0.1 dB/8 h. In addition, it features auto-off function within ten minutes inactivity so as to conserve battery life.

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This portable SDH/PDH transmission analyzer, model A0020005, incorporates electrical interfaces for SDH/PDH and optical interfaces for SDH/SONET while Tx and Rx are completely independent. Its various functions include automatic tributary scanning, automatic protection switching (APS) measurement and round trip delay measurement. The analyzer offers flexible software-defined simulated LED indicators for current and saved historical error indication. Performance analysis conforms to G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. It has a USB interface for data exchange either by cable or via storage. As well it has RJ45/RS232 interfaces. The analyzer’s firmware is upgradeable.  Additionally, its large battery capacity enables continuous operation for more than 6 hours.

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Toronto, Canada – GAO Instruments

This portable QAM analysis meter, model A0500005, operates over a wide frequency range of 5 MHz to 870 MHz with a resolution of 10 kHz and complies with ITU J.83 Annex A and DVB-C standards. It features intelligent power management, fast charging, fast setup, multi user plan and alphanumeric input and also functions as a voltmeter. This meter performs C/N measurement, return path testing, voltmeter functionality, spectrum analysis, data logging, analog TV measurement and DVB power measurements including QAM, QPSK (Quadrature Phase Shift Keying) and COFDM (Coded Orthogonal Frequency Division Multiplexing). The QAM meter uses a serial interface for data transfer.

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Toronto, Canada – GAO Instruments

This multi-function power meter, model A0670007, features an automatic calibration function and power measurement within a wavelength range of 800 to 1700 nm. Calibrated wavelengths including 850, 980, 1300, 1310, 1490, and 1550 nm are available. It offers dual measurement range including -70 to 3 dBm and -50 to 26 dBm at an accuracy of ±5% with a resolution of 0.01 dB. It displays optic power test results in mW, dB and dBm clearly on its large, high resolution LCD screen. A universal 2.5 mm adaptor, an InGaAs detector and interchangeable FC, SC, ST optical connectors are provided. The energy-saving meter has a low battery warning and operates continuously for more than 240 hours on three fully charged 1.5 V alkaline batteries. Due to its rugged design, the meter is ideal for field use.

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Toronto, Canada – GAO Instruments

This multi-function power meter, model A0670007, features an automatic calibration function and power measurement within a wavelength range of 800 to 1700 nm. Calibrated wavelengths including 850, 980, 1300, 1310, 1490, and 1550 nm are available. It offers dual measurement range including -70 to 3 dBm and -50 to 26 dBm at an accuracy of ±5% with a resolution of 0.01 dB. It displays optic power test results in mW, dB and dBm clearly on its large, high resolution LCD screen. A universal 2.5 mm adaptor, an InGaAs detector and interchangeable FC, SC, ST optical connectors are provided. The energy- saving meter has a low battery warning and operates continuously for more than 240 hours on three fully charged 1.5 V alkaline batteries. Due to its rugged design, the meter is ideal for field use.

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Toronto, Canada – GAO Instruments

This handheld optical light source, model A0630005, boasts a highly stable output power and adjustable frequency. It offers exceptional stability and insensitivity to ambient temperature variations. Its wavelength and modulation are selected simply by pushing buttons on the front panel. A universal 2.5mm adaptor is provided for power supply while FC, SC, ST interchangeable connectors are optional. Featuring a large backlit LCD display, simple operation and compact size, this optical light source is a perfect choice for field use.

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Toronto, Canada

This smart CATV cable fault locator, model A0500007, uses time domain reflection (TDR) technology to display cable faults on its LCD screen and uses the analysis software to analyze the status of the cable. The pulse propagates with the certain speed specified for different cable types. The CATV cable fault locator accurately tests 25, 50, 75 and 100 Ohm impedance cables with a length of up to 2 km. It provides an electronic map relevant to the time domain picture so that faults can be detected easily. In addition, the locator has a “Self-Study” function and can connect to a computer for file upload and data analysis.

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Toronto, Canada – GAO Instruments

This compact E1 Bit Error Rate (BER) Tester, model A0040007, performs both out-of-service framed and unframed testing. It offers full-featured measurements of E1, Datacom and protocol converter and provides extensive error detection and indication such as real-time transmission circuit open/short indication. It also conducts clock slip measurement, frequency and level measurement as well as manual and auto-timer measurement. Test results can be viewed, analyzed, assembled, filed and printed via included software that is upgradeable via an integrated RS232C interface. It possesses a large memory capacity and saves/recalls of up to ten user-defined setups and ten sets of results. What’s more, this tester boasts a high resolution LCD with smart navigation mode menus, built-in Ni-MH rechargeable batteries and smart charger circuitry.

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Toronto, Canada – GAO Instruments

This data transmission analyzer, model A0040006, features a handheld design with lanyard, multi-task operation and auto configuration. It performs online error code testing, 2 Mbit/s non-framing error code performance testing, 2 Mbit/s framing N×64 kbit/s channel error code performance testing, alarm testing, frequency offset testing, signal level and frequency testing of voice channels, audio frequency testing, loop circuit time lag testing and automatic protection switching time testing (APS). It also conducts column diagram analysis of alarms and error codes, time slot content analysis and G.821/G.826/M.2100 error code performance analysis. This analyzer has a large, high resolution backlight LCD screen for clear display and convenient analysis of data. Its 4000 mAh, 6 V nickel-hydrogen rechargeable battery allows for for more than 8 hours of continuous operation.

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Toronto, Canada – GAO Instruments

This parallel data acquisition card, model A0720002, provides a maximum sampling depth of 16 M per channel. The voltage signal acquisition ranges from ±100 mV to ±20 V and the maximum sampling rate is up to 20 Msps. Gain errors and zero-bias of each channel can be controlled independently by the DAQ controller’s fine tuning which provides high measurement accuracy and phase consistency. The card has many triggering sources, including software (manual), internal and external triggering. No manual adjustable components insure the high reliability and stability of this product.

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Toronto, Canada – GAO Instruments

This high performance E1/T1 BER tester and data transmission analyzer, model A0020004, performs error code testing at the rate of 50 b/s to 2048 kb/s and offers 2 M online monitoring for routine maintenance, repair and operations monitoring of communication equipment. The compact tester integrates V series data interfaces, EIA-530/530A and RS485/RS422 interfaces for data exchange. It offers a special remote monitoring function to perform real time monitoring through software. It is powered by rechargeable lithium batteries and offers a long, continuous operating time of 6 hours. In addition, the BER tester and data transmission analyzer has a large memory capacity of 10000 records and is equipped with a large LCD screen.

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Toronto, Canada – GAO Instruments

This data communication tester, model A0030001, features synchronous or asynchronous data transmission and G.821, G.826 and frame analysis. It functions in 2 M offline mode, 2 M online mode, DTE and DCE emulation and error insertion. An error analysis function allows histograms of either error or alarm data to be quickly and easily displayed. The compact tester integrates V series data interfaces, G.703 Co-dir 64kbit/s and G.703-2Mbit/s interfaces for data exchange. Accommodations for future interfaces are also available. It can store the selected measurement results as well as simultaneous error measurement of various parameters in onboard memory. Additionally, this data communication tester is powered by DC9 V external or built-in chargeable batteries operating continuously 4 hours.

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Toronto, Canada – GAO Instruments

This portable optical fiber identifier, model A0640004, features easy operation and high detection accuracy. It can identify three popular signal frequencies, namely, 270 Hz, 1 kHz and 2 kHz. This optical fiber identifier can efficiently identify optical fibers by inserting the fiber into its adapter head without any damage to the fibers. It provides a wavelength range for identification of 800 nm to 1700 nm and a minimum detecting sensitivity of -55 dBm. This identifier is able to identify H0.25 bare fiber and H0.9/H2.5/H3.0 tail fiber. It is equipped with LEDs for low power indication, displays of the direction of optical transmission and the intensity of optical signals. It operates continuously for at least 8 hours on a full charge.

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This smart fault locator, model A0630008, is commonly used for the installation and maintenance of optical networks. It remedies the limitation of the dead zone of an OTDR. The practical visible fault locator supports FC, ST and SC adaptors as well as CW and 2 Hz alternative optical output modes.

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Toronto, Canada – GAO Instruments

This optical power meter, model A0300027, features self-calibration, low voltage warning, auto-off function and real-time data monitoring function. It operates over the wavelength range of 850 to 1700 nm and offers working wavelengths including 850 nm, 980 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm and 1625 nm. The meter performs power measurements within a test range of -70 to10 dBm and -50 to 26 dBm at an accuracy of ± 5 %. It detects frequencies of 270 Hz, 1 kHz, and 2 kHz automatically, resets automatically and switches range automatically. FC, ST, SC or LC connectors are provided for selection and power, attenuation and relative value are displayed in nW, Uw, mW, dB and dBm on its large, high resolution LCD screen. The meter uses RS232 interface for data exchange and has a large memory capacity of up to 1000 groups of data.

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Toronto, Canada – GAO Instruments

This handheld dual channel digital oscilloscope/DMM, model A0120016, has a sampling rate of 250 MSa/s and 60 MHz bandwidth. It provides all common functions of a DMM and is able to make measurement while the use inspects past tests simultaneously. The oscilloscope uses a USB connection for communication. It features a large high resolution color LCD screen for easy view of test results. Moreover, the digital oscilloscope works continuously for up to six hours on a single charge.

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Toronto, Canada – GAO Instruments

This high performance signal level meter, model A0500013, features a portable and rugged design, high-speed measurement and simple operation. It operates over a frequency range of 46 to 870 MHz. The meter scans 125 channels at the same time and has the ability to display two channels simultaneously. It measures CATV TILT, C/N and trunk cable voltage effectively and accurately. The handheld signal level meter offers a quick response without requiring warm-up and operates continuously for more than five hours on a single charge. In addition, it clearly displays all test results on a large character backlit TN LCD screen.

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Toronto, Canada – GAO Instruments

This portable communication cable fault tester, model A0310007, has a multi-lingual interface and three testing clamps and uses CAC technology and DAGC + DWAR technology for waveform visualization. It features intelligent printing, advanced multi-functional automatic communications and safe operation under high voltage. This tester deploys high-precision rapid automatic bridge testing points for poor insulation of 50MΩ within 4s and precision soldering allowing for SMT pin distance of only 0.55mm. Its intelligent switch-mode power supply and battery charger protects against such conditions as over-voltage, over-current, short-circuit and reverse connection of power supply. The backlit LCD screen is capable of clearly displaying six resistance values between the A, B paired lines and the connection line. Moreover, the tester is able to operate continuously for up to 20 hours using an internal LG 2Ah rechargeable lithium battery.

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This spectrum analyzer, model A0310038, consists a 6-inch VGA TFT color LCD and operates over a frequency range of 9 kHz to 3 GHz with a resolution bandwidth of 100 Hz to 1 MHz. It features a large capacity rechargeable lithium battery which can be employed as an external power. It offers an RS232 interface for data download from a computer for future management, saving and printing. This Analyzer boasts the performance of a table analyzer, yet is small in size, lightweight and portable.

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The hot-pluggable data acquisition board, model A0730002, features a pre-panel to display acquisition state of channels and a post-panel to provide a cascading interface. The easy-to-install data acquisition board supports a sample acquisition depth of up to 1M for each channel and a sample memory depth of up to 1M for each channel. Its high A/D resolution is up to 12bits and sampling rate up to 500k. It provides manual, external and internal triggering on rising or falling edge with adjustable triggering levels. The frequency bandwidth of input signals is 0kHz to 150kHz in DC mode or 0.2kHz to 150kHz in AC mode.

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This portable tester, model A0300031, features voice and LED alarm and tests ADSL2+ (G.992.5), ADSL2 (G.992.3), RE-ADSL (Annex L), Double Upstream (Annex M) and downwards compatible with ADSL (G.DMT, G.Lite, T1.43). This powerful tester uses Windows™ CE operating system and provides a Web browser using a 4.3 inch large size display with backlit and chromatic touch screen, smart navigation menu. It starts test automatically and displays the results with a simple press of the “Auto Test” key. Test settings and results can be saved and deleted through the upgradeable embedded software. The low-power consumption device with an auto turn-off function can work continuously for more than 3.5 hours using its rechargeable built-in Li-ion battery or the unit can be operated using the external charger. The tester has a jacket protector with lanyard and bracket stand.

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This well-designed ADSL2+ tester, model A0300024, is designed for ADSL/ADSL 2+ installation and maintenance. Measurements can be carried out immediately with a simple push of the “Auto Test” key. The intelligent tester provides various voice alarms and LED indications and also provides an auto-off function for energy-saving. The embedded chipset can be upgraded via Ethernet interface to meet the development of ADSL standards enhancing the return on investment for this device. It has built-in Ni-MH rechargeable batteries featuring a quick charge time of less than 2.5h. These features together with its compact size make the tester a valuable tool for field technicians.

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Toronto, Canada – GAO Instruments

The 10/100/1000M Ethernet analyzer, model A0300004, offers two working modes: dual-port mode and remote testing mode. In dual-port mode, most of tests can be completed via the single analyzer; in remote testing mode, long distance tests can be carried out with two analyzers placed at the two ends of a WAN. It has a USB port to upload stored data to a computer. The easy-to-use Ethernet analyzer displays text and graphics on its TFT LCD screen. Its portable size and user-friendly design make the analyzer easy to use in various complex testing environments.

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This portable signal level analyzer, model A0500014, is small in size and light in weight and has a large LCD screen for clear display of test results. It tests CATV signal levels in both channel (SCAN) and frequency (SPECTRUM) modes. In ‘SCAN’ mode, the analyzer is able to scan all channels and record signal levels in internal memory for later analysis. In ‘SPECTRUM’ mode, the analyzer can carry out spectrum displays and tests within the frequency range. This handheld analyzer stores twenty-four groups of scanned data (up to 100 channels per group) and has two RF F-Type input ports. Windows compatible software is included for easy system set up.

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This efficient and reliable ADSL2+ tester, model A0300019, features automatic test data refreshment, auto power off and back-light time out. When operating as a digital multi-meter (DMM), it performs loop resistance, capacitance, insulation resistance and voltage measurement. The portable ADSL2+ tester has both auto and multiple modem modes and can store up to 99 groups of data. It communicates with a computer through an RS232. This tester has an LCD display and easy menu operation.

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This synthesized RF signal generator, model A0200001, offers abundant modulation functions including amplitude modulation, frequency modulation, phase modulation and pulse modulation. It works over a wide frequency range of 250kHz to 2GHz at an accuracy of ±0.5dB and from 2GHz to 4GHz at an accuracy of ±0.9dB. The built-in modulation signal generator features a GPIB remote control function, 10MHz frequency resolution, and a wide output power range from -136dBm to 7dBm. When its source power output is less than 4dBm, its spectral purity is less than -30dBc, and when its source power output is less than 7dBm and frequency deviation is more than 3kHz, its spectral purity is less than -53dBc.

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This high performance cable fault locator, model A0300025, features a large LCD screen, simple operation, automatic resolution test, low voltage warning, auto power-off and a fast  sampling speed of 500MHz. It can locate fault distance automatically without manual intervention and the test distance of its dead zone is less than 1m. The measurement range is from 1 to 6000m; calibrated measurement distances are 50m, 100m, 200m, 800m, 1600m, 3000m and 6000m. It is able to connect with a computer or printer facility via RS232 serial port. All of these features together with compact size make it a valuable tool for field technicians.

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This high performance signal level meter, model A0500016, features FCC standard limit testing, transmission and reflectivity characteristic testing and automatic timing measurements. The meter provides such key functions as measuring and displaying the amplitude at a specific frequency or any carrier as defined by the user. It operates at two optional frequency ranges: 46MHz to 870MHz and 5MHz to 870MHz. The meter has an interface for connection with a computer or a printer. Its peak-hold level measurement function allows it to detect the occasional fluctuation efficiently and accurately in either LEVEL or SPECTRUM mode.

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This USB PC based oscilloscope, model A0130005, contains fully synchronized cross triggering to capture and display analog events that affect digital circuits, or vice-versa, and correlate the two to identity cause and effect relationships. It features continuously variable pre-/post-trigger view, variable threshold voltage on logic analyzer channels, external clock input, ruggedized inputs, 20GHz repetitive mode sample rate and fast screen update rates. It slashes the cost of capturing and analyzing signals on up to 50MHz microprocessors, logic families, and analog circuits on systems. The display screen shows the full 256K/512K/1Mega sample deep data buffers for both the analog waveform and the digital data pattern. All-channel zoom expansion and cursors identify synchronous events on different channels.

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This portable super signal level meter, model A0500003, operates at a frequency range of 45MHz to 870MHz or 5MHz to 870MHz. It features a compact size, automatic timing measurements, transmission and reflectively characteristic testing functions and an intelligent quick charging function. Users can detect the occasional signal disturbance through the peak-hold function in the LEVEL and SPECTRUM modes. In addition, it communicates with a computer or a printer via interface for data exchange.

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This handheld digital oscilloscope/DMM, model A0120016, provides multi-signal measurement and inspection. The oscilloscope has a sampling rate of 250MSa/s or 60MHz under dual channel mode. It is shipped with USB based communication software. It features a large high resolution color LCD screen for easy view of test results. Moreover, the oscilloscope works continuously for up to six hours on a single charge.

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The easy-to-use PCM channel analyzer, model A0500033, features touch operation, key-stroke operation, expanded mouse operation, analog and digital interfaces, flexible control modes and a convenient GUI. Either equal step or customized frequency spots are selectable. Users can develop and design voice channel measurement and control systems under various conditions remotely via USB or Ethernet interface. The high performance PCM channel analyzer stores up to 100 groups of data, compares the measured results with built-in standard ITU-T tolerance masks and evaluates whether the results indicate passed or failed. Test results can be uploaded to a computer where they can be further viewed, analyzed, assembled, filed and printed via upgradable embedded software.

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Toronto, Canada – GAO Instruments

This easy-to-use ADSL2+ tester, model A0300006, tests ADSL physical layers, ADSL network layers and ADSL lines and is able to conduct tests while the user browses previous records. It is able to communicate through a RS232 interface. This ADSL2+ tester implements line parameter testing including up and down channel rate, line attenuation, noise margin, transmission power and the utilization ratio of a channel. It automatically detects line errors and displays alarms such as signal loss, frame loss, power loss and cell loss at both the proximal end and remote end. This tester also has the ability to store seven test settings and one hundred test results making set-up and testing fast and efficient.

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This easy-to-use mini optical power meter, model A0670006, offers various measurement ranges for different demands including -60dBm to 3dBm, -50dBm to 10dBm, -40dBm to 20dBm, and -30dBm to 30dBm at an accuracy of ±5%. The wavelength ranges from 800nm to 1650nm with calibrated wavelengths at 850, 980, 1310, and 1550nm. A universal 2.5mm adaptor and interchangeable FC, SC, ST optical connectors can be provided. The energy- saving meter has a low battery warning and operates continuously for up to 360 hours on three 1.5V batteries. The meter offers a quick response without requiring warm-up. Additionally, it is resistant to dust and water making it suitable for field testing.

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Toronto, Canada – GAO Instruments

This easy-to-operate xDSL tester, modelA0300032, features high accuracy, fast response time and multiple practical functions. It assists in confirming whether a line is suitable for XDSL services. It also verifies connectivity from user to ISP service provider and conducts network layer tests after dial-up, including Ping, Ipconfig, Route and Tracert. This tester emulates a computer to test broadband IP lines or initiates PPPoE dial-up to test IP network connections and troubleshoots modem or computer problems. It performs computer emulation without an additional ADSL2+ or VDSL modem or computer. This tester boasts a TFT true color LCD screen with touch panel, a user-friendly interface supporting Web browsing and auto power-off. In addition, it operates under Windows CE operating systems and can store up to 2000 ADSL test records.

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Toronto, Canada – GAO Instruments

This handheld fault locator, model A0630008, features low voltage warning and automatic power off for saving energy. It distinguishes the faults of fiber jumper, jumper board, distribution frames and tie-ins and remedies the usual limitation of the dead zone of an OTDR. It can test the fault location of OTDR blind-measuring area accurately. In addition, the practical visible fault locator uses FC, ST and SC adaptors. CW and 2Hz alternative optical output modes are available.

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This parallel data acquisition module, model A0710007, is equipped with two high-speed 40M 12bits ADCs and features a small-size, stacked connection, DasView2.0 analysis software system and easy to use bus drive. It allows for quick and easy data acquisition and control to be carried out using a computer. This compact data acquisition module has a memory depth of 4M/ch which can be extended to 8M/ch or 16M/ch. It achieves ±40mV to ±40V voltage signal acquisition with tool kit. This data acquisition board boasts a wide sampling rate ranging from 1k to 20M with a low inter-channel phase difference of less than 1°. What’s more, it performs highly accurate measurements with phase consistency.

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This optical power meter, model A0300027, automatically detects frequencies of 270Hz, 1kHz, and 2kHz. It boasts a built-in long wavelength camera probe and a newly-designed electric rubber switch. The portable optical power meter offers simple and reliable operation and is suitable for various environments. It features automatic range switch, reset, power off and multi-wavelength measurement.

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This portable digital insulation tester, modelA0310005, features double insulation protection. Continuity measurements are conducted using either 200mA or 7mA test currents. The output voltage for insulation resistance testing can be set to 50V, 100V, 250V, 500V, or 1000V to meet various requirements. This digital insulation tester provides simple and clear operation, and tests are carried out quickly with stored test results. It communicates with a computer via a RS-232 interface for data exchange and offers enough memory capacity to store 1000 test results. The insulation tester is equipped with a high-definition backlit LCD screen for clear display of results and has an automatic turn-off function to save power when not in use. An IP54 rating allows for robust operation even in more severe environments.

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This parallel data acquisition card, modelA0720002, boasts a maximum sampling depth of 16M per channel. The voltage signal acquisition ranges from ±100mV to ±20V and the maximum sampling rate is up to 20Msps. Gain errors and zero-bias of each channel can be controlled independently by the DAQ controller’s fine tuning which provides high measurement accuracy and phase consistency. The card has many triggering sources, including software (manual), internal and external triggering. No manual adjustable components insures the high reliability and stability of this product.

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Toronto, Canada – GAO Instruments

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This portable transmission analyzer, model A0300026, functions include E automatic tributary scanning, automatic protection switching (APS), and round trip delay measurement. It offers a memory capacity of 128MB and features flexible software-defined simulated LED indicators for current and saved alarm status indication. Performance analysis conforms to  G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. Test results can be downloaded to a computer via the USB port and firmware can be upgraded via USB, RJ45 or RS232 interface. In addition, the analyzer operates continuously for more than six hours on a single charge.

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This CATV cable fault locator, model A0500007, applies Time Domain Reflection (TDR) technology and display it on its LCD screen. This locator accurately tests 25, 50, 75 and 100Ohm impedance cables with a length of up to 2km. This portable cable fault locator provides an intuitive electronic map relevant to the time domain picture so that faults can be detected easily. In addition, it can connect to a computer for file upload and data analysis.

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This multi-functional power meter, model A0670007, operates at a high accuracy of ±5% and offers an automatic calibration function. Calibrated wavelengths including 850, 980, 1300, 1310, 1490, and 1550nm are available. It displays optic power in mW, dB and dBm on its large, high resolution LCD screen. The meter consumes little power and provides more than 240 hours continuous operation with three 1.5V batteries. Due to its rugged design, the meter is dust and water resistant,   the power meter is ideal for field use.

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This handheld digital transmission analyzer, model A0300005, can be used to test digital channels with 2Mbit/s interfaces, equi-directional 64kbit/s interfaces, or other interfaces such as V.24/V.28/RS232, V.35, V.36, RS449, X.21, RS485, EIA530, EIA530A. It stores as many as nine test settings and twenty groups of test results in its on-board memory to avoid data loss in the event of power failure. Test results can be transmitted to a computer for storage, analysis and printing. The handheld analyzer has an internal rechargeable battery which enables more than eight hours continuous operation.

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This USB PC based oscilloscope, model A0130003, is compatible with USB 2.0 and requires no external power. It displays waveform average statistics, persistence, intensity, subtraction, and multiplication. The waveforms can be saved to text, MS Word or Excel, or graphic files (JPG or BMP). This versatile USB PC based oscilloscope with a 40MHz bandwidth operates under such operating systems as Windows98, Windows Me, Windows NT, Windows 2000, Windows XP and Vista. It offers three triggering modes – auto, normal and single for selection and has a maximum sample rate of 250MS/s.

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This high performance E1/T1 BER tester and data transmission analyzer, model A0300001, performs error code testing at the rate of 50b/s to 2048kb/s. It offers 2M online monitoring, which can be used for routine maintenance, repair and operations monitoring for communication equipment. This tester integrates a special remote monitoring function to perform real time monitoring through software. It is powered by rechargeable lithium batteries. In addition, the BER tester and data transmission analyzer has a large capacity memory for data storage and is equipped with a large LCD screen.

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The USB PC based oscilloscope, model A0130001, conducts PASS/FALL checks, waveform average, persistence, intensity, invert, addition, subtraction, multiplication, division, and X-Y plot. It saves waveforms in various formats including text, jpg/bmp graphic file, MS Excel/Word file. It runs under most Windows OS up to VISTA. The USB PC based oscilloscope can be connected to computer with a USB cable (included) for both data transfer and power supply as a replacement of external power supply. It combines the functions of an oscilloscope, spectrum analyzer, waveform recorder, signal generator, voltmeter and cymometer. The USB PC based oscilloscope operates at up to 100Ms/s real-time sampling rate at a bandwidth of 50MHz.

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This data communication tester, model A0300002, integrates four data interfaces and G.703 Co-dir 64kbit/s and G.703-2Mkbit/s interface; accommodations for future interfaces have also been considered. It offers an error analysis function enabling easy display of histograms. This data communication tester also supports DTE and DCE emulation.

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This cost-effective USB waveform generator and frequency counter, model A0200002, is shipped with both SDK and API and can be easily integrated or embedded into other auto-measuring systems. It is integrated with one channel of arbitrary waveform output, 8 bit output, synchronized signal output and two input channels for counter/frequency measurement, 8 bit input and external trigger input. Users can arbitrarily edit the waveform using a mouse. Parameters such as amplitude, frequency and offset are configurable. Users can also choose regular waveforms including Sine, Square, Triangle, Saw-tooth, TTL, white Noise, GaussIian Noise, Trapezoid, Exponent, AM and FM are configurable. A computer transfers the waveform data into the memory of the signal generator via USB bus; the ID counter cycles and sends the periodic waveform data to the DAC circuits.

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This handheld E1 BER tester, model A0300020, features self-check and keyboard testing, extensive error and alarm generation, detection and indication. This tester with smart navigation mode has a large color LCD screen allowing test results to be displayed clearly. It offers full-featured measurements of E1, Datacom and Protocol Converter. Test results can downloaded or printed via included software. The embedded software is upgradeable via an integrated USB interface. This low-power consumption tester offers alarms and indications for signal loss, AIS, frame loss, MFrame loss, pattern loss, remote alarm, errors, low battery.

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This handheld optical light source, model A0630005, offers exceptional stability and insensitivity to ambient temperature variations. It boasts a highly stable output power and adjustable frequency. Its wavelength and modulation are selected simply by pushing buttons on the front panel. A universal 2.5mm adaptor is provided for power supply while FC, SC, ST interchangeable connectors are optional. Featuring a large backlit LCD display, simple operation and compact size, this optical light source is a perfect choice for field use.

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This well-designed ADSL2+ tester, model A0300024, is intended for ADSL/ADSL 2+ installation and maintenance. Measurements can be carried out immediately with a simple push of the “Auto Test” key. The intelligent tester provides various voice alarms and LED indications and also provides an auto-off function for energy-saving. The embedded chipset can be upgraded via Ethernet interface to meet the development of ADSL standards enhancing the return on investment for this device. It has built-in Ni-MH rechargeable batteries featuring a quick charge time of less than 2.5h. These features together with its compact size make the tester an valuable tool for field technicians.

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This compact data communication tester, model A0300002, provides various interfaces including V.24, V.35, V.11, X.21, G.703 Co-dir 64kbit/s and G.703-2Mkbit/s for data exchange and has accommodations for future interfaces. It provides histogram display of error analysis results or alarm data. The portable tester supports synchronous data transmission, asynchronous data transmission, G.821 analysis, G.826 analysis and frame analysis. Measurement results can be stored in its onboard memory to prevent data loss in the event of power failure.

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Toronto, Canada – GAO Instruments

The 10/100/1000M Ethernet analyzer, model A0300004, offers  two working modes: dual-port mode and remote testing mode. In dual-port mode, most of tests can be completed via the single analyzer; in remote testing mode, long distance tests can be carried out with two analyzers placed at the two ends of a WAN. It has a USB port to upload stored data to a computer. The easy-to-use Ethernet analyzer displays text and graphics on its TFT LCD screen. Its portable size and user-friendly design make the analyzer easy to use in various complex testing environments.

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This handheld data communication tester, model A0300002, integrates various interfaces for data exchange under V.24, V.35, V.11, X.21, G.703 Co-dir 64kbit/s and G.703-2Mkbit/s interface; accommodations for future interfaces have also been considered. An error analysis function allows histograms of error or alarm data to be quickly and easily displayed. The compact tester supports synchronous or asynchronous data transmission. It also generates and monitors PCM30, PCM30 CRC, PCM31 and PCM31 CRC frame structures. The measurement results can be stored in its onboard memory to prevent data loss in the event of power failure.

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This high performance signal level meter, model A0500016, features FCC standard limit testing, transmission and reflectivity characteristic testing and automatic timing measurements. The meter provides such key functions as measuring and displaying the amplitude at a specific frequency or any carrier as defined by the user. It operates at two optional frequency ranges: 46MHz to 870MHz and 5MHz to 870MHz. The meter has an interface for connection with a computer or a printer. Its peak-hold level measurement function allows it to detect the occasional fluctuation efficiently and accurately in either LEVEL or SPECTRUM mode.

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This portable optical fiber identifier, model A0640003, operates at a wavelengths of 900nm to 1650nm and has an optical power reading range from -30dBm to 5dBm. It tests and detects optical signals, modulation signals and the presence or absence of signals during the process of installation, maintenance, rerouting or restoration. The identifier also detects the relative core power of optic fiber. It provides Ø0.25, Ø0.9, Ø2.0 and Ø3.0 replaceable adaptors for various optical cables. Frequency signals including CW, 270Hz, 1kHz and 2kHz can be identified.

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This practical digital insulation resistance tester, model A0300029, includes a built-in high power voltage generator that enables the output testing voltage to be adjustable over 250V, 500V or 1000V depending on requirements. It tests insulation resistance up to 2000MΩ and measures alternating current and voltage below 750V AC. A high contrast backlit LCD screen allows for visibility of test results under bright sunlight or in poorly lit environments. Encapsulated in a rugged and moulded plastic case, this high performance digital insulation resistance tester is an invaluable tool for field testing.

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This handheld digital oscilloscope/DMM, model A0120016, provides multi-signal measurement and inspection. The oscilloscope has a sampling rate of 250MSa/s or 60MHz under dual channel mode. It is shipped with USB based communication software . It features a large high resolution color LCD screen for easy view of test results. Moreover, the oscilloscope works continuously for up to six hours on a single charge.

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This radio frequency signal generator, model A0400001, offers non-volatile RAM which can store a hundred samples of data. It features both an RS-232C and an IEEE-488 interface. The signal generator provides a highly stable time base to satisfy the most stringent requirements in terms of time base aging and accuracy. The signal generator can be controlled remotely by a computer or other instruments. In open mode, its RF output is adjustable between -8dBµ and120dBµ at an accuracy of ±1.5dB. This generator consumes 35W maximum power.

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This well-designed mini optical time domain reflectometer, model A0500001, features a 1.6m dead zone, 0.1m sample resolution with 65k sampling points, a pulse width from 10ns to 20480ns and a high dynamic range of 42/40dB. It reads and writes files in Bellcore GR196 format and offers a large memory capacity for data storage. The mini-OTDR transmits data via a serial, parallel or USB interface. It continuously operates for over eight hours on a single charge. The mini-OTDR has a touch panel and large color LCD screen.

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This arbitrary waveform generator module, model A0710001, features easy integration, a frequency resolution function, high stability and an excellent performance-to-price ratio. The DDS CORE controller drives the arbitrary waveform generation with an output repeat frequency range of 0.02Hz to 5MHz with 0.02Hz adjustment steps. It generates standard waveforms such as sine waves, square waves, saw-toothed waves, pulse waves and frequency and amplitude modulated signals. Additionally, this arbitrary waveform generator can output waveform documents.

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Toronto, Canada –

This arbitrary waveform generator module, model A0710001, features easy integration, a frequency resolution function, high stability and an excellent performance-to-price ratio. The DDS CORE controller drives the arbitrary waveform generation with an output repeat frequency range of 0.02Hz to 5MHz with 0.02Hz adjustment steps. It generates standard waveforms such as sine waves, square waves, saw-toothed waves, pulse waves and frequency and amplitude modulated signals. Additionally, this arbitrary waveform generator can output waveform documents.

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Toronto, Canada

This well-designed mini optical time domain reflectometer, model A0500001, features a 1.6m short event dead zone, 0.1m sample resolution with 65k sampling points, a pulse width from 10ns to 20480ns and a high dynamic range of 42/40dB, which ensures accurate signal processing. It reads and writes files in Bellcore GR196 file format and offers a large memory capacity for data storage. The mini-OTDR transmits data to a PC via a serial or parallel interface. A USB interface is also provided for data transmission. This innovative OTDR continuously operates for over eight hours on a single charge; battery levels are displayed accordingly. It has a large color LCD screen with touch panel to clearly display signal analysis results.

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Toronto, Canada –

This high performance optical fiber identifier, model A0640002, features low bending loss, offers an easy-to-replace adaptor and displays three levels of signal intensity. It identifies optical signals at wavelengths from 900 to 1650nm and does not require opening a fiber at a splice point for identification. In addition, an audible tone can be heard when destructive detection is present on the fiber during testing.

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Toronto, Canada – GAO Instruments

This optical power meter, model A0300034, automatically detects frequencies of 270Hz, 1kHz, and 2kHz. It boasts a built-in long wavelength camera probe and a newly-designed electric rubber switch. The portable optical power meter offers simple and reliable operation and is suitable for various environments. It features automatic range switch, reset, power off and multi-wavelength measurement.

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Toronto, Canada –

This rugged tester, model A0300031, conducts upstream and downstream rate measurement, error count, modem simulation, and ping test. To protect the customer’s investment, it provides upgradable software via Ethernet or USB interface. It is equipped with a 4.3 inch colorful display screen with backlight and smart navigation menu for convenient operation. The tester features real-time display of data rate and flux and boasts a large storage volume for convenient storage of test settings and results. This powerful tester operates under the Windows™ CE platform and is capable of Web site browsing. The ADSL2+ tester works continuously for more than 3.5 hours using its rechargable built-in Li-ion battery or the unit can be operated using the external charger.

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Toronto, Canada

This compact ADSL2+ tester, model A0300019, incorporates xDSL testing, PPPoE testing, DMM functions and modem emulation. When operating as a digital multi-meter (DMM), it performs loop resistance, capacitance, insulation resistance and voltage measurements. The portable ADSL2+ tester has both auto and multiple modem modes and can store up to 99 groups of data. It has a high definition backlit LED screen for clear display and an auto power-off function will kicks within a few minutes inactivity.

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Toronto, Canada – GAO Instruments 

This portable optical light source, model A0630006, offers CW modulation frequencies of 2Hz, 270Hz, 1kHz and 2kHz. It provides 1310nm and 1550nm wavelengths for the single mode fiber measurement or 850/1300nm wavelength for multimode fiber. Equipped with a large backlit LCD, the light source is easy to use. This optical light source has a compact size and long operation time and is an ideal solution for use in the field. .

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Toronto, Canada – GAO Instruments

This super signal level meter, model A0500003, operates within a broad frequency range of 45MHz to 870MHz or 5MHz to 870MHz. The peak-hold level measurement function in the LEVEL and SPECTRUM modes enables the meter to detect the occasional disturbance. The meter features a compact size, automatic timing measurements and quick charging. It is an ideal and invaluable tool for CATV signal testing.

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Toronto, Canada –

This easy-to-use digital oscilloscope, model A0120003, features mathematical functions, FFT spectrum analysis, automatic parameter measurements and option configurations like time display. It boasts high/low pass, band pass and band-stop digital filters. The high performance oscilloscope measures Vpp, Vamp, Vrms, Vmax, Vmin, Vtop, Vbase, Vavg, Freq, Period, Risetime, Fulltime. What’s more, this multi-function digital oscilloscope captures signals triggered with edge, pulse and video and analyzes synchronized signals with a delay scanner.

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Toronto, Canada – GAO Instruments

This accurate cable fault locator, model A0300025, automatically locates fault distance without manual intervention. The measurement range is from 1 to 6000m; calibrated measurement distances are 50m, 100m, 200m, 800m, 1600m, 3000m and 6000m. The locator features a large LCD screen, simple operation, automatic resolution test, low voltage warning, auto power-off and a fast sampling speed of 500MHz. A rechargeable Li-battery is provided with this cable fault locator enabling it to works continuously for 12 hours on a single charge.

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Toronto, Canada

This handheld digital transmission analyzer, model A0300005, can be used to test digital channels with 2Mbit/s interfaces, equi-directional 64kbit/s interfaces, or other interfaces such as V.24/V.28/RS232, V.35, V.36, RS449, X.21, RS485, EIA530, EIA530A. It stores as many as nine test settings and twenty groups of test results in its on-board memory to avoid data loss in the event of power failure. Test results can be transmitted to a computer for storage, analysis and printing. The handheld analyzer has an internal rechargeable battery which enables more than eight hours continuous operation.

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Toronto, Canada – GAO Instruments

This USB PC based oscilloscope, model A0130005, provides innovative cross triggering so that logic analyzer channels can trigger the analog channels and vice versa. It provides continuously variable pre-/post-trigger view, variable threshold voltage on logic analyzer channels, external clock input, ruggedized inputs and fast screen update rates. High impedance probes, logic analyzer pod, chips, wires and software are included in the kit. The oscilloscope connects with a computer through the parallel or USB port to upload data and for later analysis and printing. In addition, its software can be upgraded via the Internet.

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GAO Instruments’ PCM channel analyzer, model 2038, incorporates an analog signal generator/receiver, a selective level meter, a BER tester, a ring generator/identifier, a dialer, a DC loop circuit (ICT, OGT), a balanced bridge and a reflecting bridge into a single instrument. It supports equal step sequence of frequency spots or customized spots where the number of spots is selectable. The high performance PCM channel analyzer stores up to 100 groups of data, compares the measured results with built-in standard ITU-T tolerance masks and evaluates whether the results passed or failed. Users can develop and design voice channel measurement/control systems under various conditions by using remote control via USB or Ethernet interface. Test results can be uploaded to a computer where they can be further viewed, analyzed, assembled, filed and printed via included Test Manager Pro software; the embedded software is upgradable online.

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Toronto, Canada – GAO Instruments

This portable optical multi-meter, model A067001, supports a measurement range from -60dBm to 10dBm or -50dBm to 26dBm with a resolution of 0.01dB. It provides a stabilized light source using a dual-wavelength laser diode, with one port output. Different light source and power meter options are available for selection according to specific need. In addition, this compact optical multi-meter offers an auto-off function which kicks within ten minutes of inactivity.

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Toronto, Canada – GAO Instruments

This compact ADSL2+ tester, model A0300010, automatically transmits VPI, VCI, user name and password according to embedded configuration parameters input via accompanying software. It supports a maximum measurement distance of 6.5km and stores one hundred groups of test results, along with configurations and margins, which can be uploaded to a computer for analysis. Test results are clearly displayed on the high resolution backlit LCD screen which also indicates alert conditions and the connectivity of WAN or LAN. In addition, the operator only needs to enter the configuration, set the measurement margin and parameters, and with the press of a single key, ADSL2+ line parameter testing, modem simulation and ISP login are conveniently completed.

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Toronto, Canada – GAO Instruments

This parallel data acquisition card, model A0720002, offers four parallel channels with an independent 20Msps 12-bit A/D converter and an independent programmable gain amplifier for each channel. It features an auto-calibration function thereby no POT is required on the card for adjustment. The voltage signal acquisition ranges from 100mV to 20V; the sampling depth of each channel can be up to 16Msps. With a maximum sampling rate of 20Msps, this card is an ideal solution for the formation of multi-channel virtual instrument systems. Moreover, this data acquisition card has three trigger modes which are software, internal or external.

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Toronto, Canada – GAO Instruments

This handheld power meter, model A0670003, tests optical power at both 1310nm and 1550nm wavelengths. Its power input range is from 23dBm to -37dBm. The power meter is equipped with a high resolution backlit LCD screen for clear display of measurements. It consumes little power and also offers a quick response time without requiring warm-up. Overall, this optical power meter’s compact size, light weight and easy operation make it suitable for field use.

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Toronto, Canada – GAO Instruments

This portable visual fault locator, model A0680001, supports mechanical fusion splice optimization and locates faults at a distance of up to 5km from the source. It has an auto-off function which kicks in within 10 minutes of inactivity and is able to operate continuously for up to 25 hours on a single charge. This visual fault locator has an FC adapter compatible with both SC and ST connectors. The fault locator’s durability, portability and high efficiency make it an invaluable instrument for field use.

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Toronto, Canada – GAO Instruments

The ADSL 2+ tester, model A0300010, can write configuration and margin values via Test Manager Pro software by connect through USB and is able to store over 100 test results on board. Further analysis, file printing, result output and software upgrade can be conducted on a PC through TestManagePro software. It has an indicator alarm and shows the connectivity of WAN and LAN by LED. This light, small, one-key operation ADSL tester is an excellent choice for professionals and technicians.

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Toronto, Canada – GAO Instruments

The handheld optical power meter, model A0670005, tests optical power within the wavelength range of 800 to 1650nm and displays optical power in mW, dB and dBm. It offers calibrated wavelengths including 850, 980, 1310, and 1550nm. This cost-effective optical power meter features a dust and water resistant design, a low battery warning and quick response time without requiring warm-up. A large battery capacity ensures continuous operation of up to 28 hours. The meter saves test time and decreases potential errors due to its capability of automatic wavelength recognization. Additionally, this energy-saving meter will automatically shut down after ten minutes of inactivity.

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Toronto, Canada – GAO Instruments

This portable transmission analyzer, model A0300026, incorporates multiple functions such as performance analysis, anomaly/defect analysis, overhead analysis, pointer analysis, automatic tributary scan, automatic protection switching (APS), round trip delay measurement and E1 pulse mask analysis. It offers a memory capacity of 128M to store test results and conforms to G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. While conducting anomaly/defect analysis, it inserts an anomaly/defect at the transmit end and receives at the sink end. Records and statistics of received anomalies/defects can be displayed in tabular and graphic modes. Test results can be downloaded to a computer via the USB port. Its firmware is upgradable via USB, RJ45 or RS232 interface. In addition, the analyzer can work continuously for six hours on a single charge.

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Toronto, Canada – GAO Instruments

The QAM analysis meter, model A0500005, operates over a wide frequency range of 5MHz to 870MHz with a resolution of 10kHz. It boasts intelligent power management, fast setup and alphanumeric input and allows for easy transfer of test data to a computer or printer. The meter measures and displays parameters such as channel power, MER and BER, signal level of DVB networks at a specific frequency or any carrier within the system range. In addition, this portable analyzer efficiently and accurately tests analog, QAM and FM channels and also functions a voltmeter.

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Toronto, Canada – GAO Instruments has released its handheld signal level analyzer designed and manufactured for CATV system installation and testing. This signal level analyzer operates over the frequency range of 5MHz to 870MHz. It features a rugged design and simple operation and measures CATV TILT, C/N and trunk cable voltage.

This portable signal level analyzer, model A0500015, provides a level range of 30dBμV to 115dBμV. It scans up to 125 channels at a speed of 30 channels per minute and stores twenty-three groups of scanned data (up to 100 channels per group). This easy-to-carry analyzer can test CATV signals accurately in both channel (SCAN) and frequency (SPECTRUM) modes. In “SCAN” mode, the analyzer scans all channels and records signal levels in internal memory for later analysis. In “SPECTRUM” mode, the analyzer displays spectrums and conducts tests within certain frequency ranges. This rugged signal level analyzer is configured with a 128X64-matrix backlit LCD screen for clear display of test results.

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Toronto, Canada – GAO Instruments

The fiber optic light source, model A0630009, offers CW, 2Hz modulation output at 650nm and CW, 270Hz, 1kHz, 2kHz modulation output at other wavelengths. It has a typical output power of -7dBm for LD and -20dBm for LED with a high stability of ±0.05dB/15mins or ±0.1dB/8h. It is equipped with a backlit LCD screen for clear visibility of test results. Its auto-off function kicks within ten minutes inactivity which prolongs the battery life. The compact size and light weight make it easy for the engineers to use all day in field testing.

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Toronto, Canada – GAO Instruments

GAO Instruments’ 12bit dual-channel data acquisition module, model A0710006, allows for quick and easy data acquisition and control to be carried out using a computer. The card is small-sized and features stacked connection and bus drive. It has a memory depth of 4M/CH which can be extended to 8M/CH or 16M/CH. This data acquisition board achieves ±40mV to ±40V voltage signal acquisition. Its sampling rate ranges from 1k to 20M with a low inter-channel phase difference of less than 1°. What’s more, it performs highly accurate measurements with phase consistency.

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Toronto, Canada –

This handheld E1 BER tester, model A0300020, performs clock slip measurement, frequency and level measurements as well as out-of-service framed and unframed testing. It provides extensive error detection and indications such as transmission circuit open/short indication. The BER tester has a large memory capacity which can save/recall up to ten user-defined setups and ten sets of results. Test results can be uploaded, saved and printed for analysis via Test Manager Pro™ software. This tester works continuously for up to six hours on a single charge and can be charged with an automobile battery adapter. It boasts upgradable software and a high resolution LCD screen with smart navigation menus. This multi-functional E1 BER tester runs under Windows 98, ME, 2000, NT and XP operating systems.

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Toronto, Canada – GAO Instruments

This easy-to-use fiber optic identifier, model A0640004, identifies multiple signal frequencies including 270Hz, 1kHz and 2kHz. It is equipped with an LED for low power indication and displays the intensity of optical signals. The identifier is able to identify H 0.25 bare fiber and H0.9/H2.5/H3.0 tail fiber. In addition, this fiber optic identifier operates over a wavelength range of 800nm to 1700nm and works continuously for at least eight hours on a full charge.

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Toronto, Canada

This handheld optical multimeter, model A0670010, is configured with a high resolution LCD for clear display and a RS232 interface for data transmission. It offers optional wavelengths at 850nm, 980nm, 1300nm, 1310nm, and1550nm to meet various requirements. This optical multimeter integrates functions of both an intelligent optical power meter module and a highly stable light source module. The integration enables it to implement loop-around test by using both modules which can work individually by function switch operation in the menu.

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This easy-to-use mini optical power meter, model A0670006, used in conjunction with GAO Instruments’ mini handheld light source (A0630001) offers a portable, highly useful testing pair for optical fibers. It is equipped with a high resolution LCD screen and displays optical power in mw, dB and dBm. The optical power meter can work continuously for up to 360 hours with three 1.5V batteries. Additionally, it is resistant to damp, dust and water making it suitable for field testing.

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Toronto, Canada –

This synthesized RF signal generator, model A0200001, offers abundant modulation functions including amplitude modulation, frequency modulation, phase modulation and pulse modulation. Step sweep and list sweep provide flexible digital functions which help achieve control over output frequency and power. Its output power range is from -136dBm to 7dBm. On UHF receivers, the generator is able to measure selectivity, sensitivity, inter-nodulation distortion, AM rejection, AGC response, audio hum, noise and distortion and STAND ratio. This synthesized signal generator can be used for multiple environments for various purposes because of its high power accuracy and spectral purity.

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Toronto, Canada – GAO Instruments

This cost-effective USB waveform generator and frequency counter, model A0200002, is shipped with both SDK and API and can be easily integrated or embedded into other auto-measuring systems. It is integrated with one channel of arbitrary waveform output, 8 bit output, synchronized signal output and two input channels for counter/frequency measurement, 8 bit input and external trigger input. Users can arbitrarily edit the waveform using a mouse. Parameters such as amplitude, frequency and offset are configurable. Users can also choose regular waveforms including Sine, Square, Triangle, Saw-tooth, TTL, white Noise, GaussIian Noise, Trapezoid, Exponent, AM and FM are configurable. A computer transfers the waveform data into the memory of the signal generator via USB bus; the ID counter cycles and sends the periodic waveform data to the DAC circuits.

Its price has been reduced to US$459.00 for a limited time only.

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Toronto, Canada –

This practical digital insulation resistance tester, model A0300029, includes a built-in high power voltage generator that enables the output testing voltage to be adjustable over 250V, 500V or 1000V depending on requirements. It tests insulation resistance up to 2000MΩ and measures alternating current and voltage below 750V AC. A high contrast backlit LCD screen allows for visibility of test results under bright sunlight or in poorly lit environments. Encapsulated in a rugged and moulded plastic case, this high performance digital insulation resistance tester is an invaluable tool for field testing.

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Toronto, Canada –

For any sales inquires please contact:

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Toronto, Canada –

This high performance optical fiber identifier, model A0640002, features low bending loss, provides an easy-to-replace adaptor and displays three levels of signal intensity. It identifies optical signals at wavelengths from 900 to 1650nm. This compact fiber optic identifier does not require opening a fiber at a splice point for identification and thus avoids interrupting service. In addition, an audible tone can be heard when destructive detection is present on the fiber during testing.

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Toronto, Canada –

This arbitrary waveform generator module, model A0710001, features easy integration, a frequency resolution function, high stability and an excellent performance-to-price ratio. The generator uses DDS, PFGA, and SRAM. The DDS CORE controller drives the arbitrary waveform generation with output repeat frequency range from 0.02Hz to 5MHz with 0.02Hz adjustment steps. It generates standard waveforms such as sine waves, square waves, saw-toothed waves, and pulse waves and frequency and amplitude modulated signals. Additionally, this arbitrary waveform generator can output waveform documents or generate waveforms based on mathematical expressions.

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Toronto, Canada – GAO Instruments

This vector network analyzer, model A0300034, provides accurate standing wave ratio, return loss, cable loss, impedance, absolute power and distance-to-fault measurements. It operates over a frequency range of 1MHz to 3.6GHz and offers a scanning speed of 1ms per point at maximum. The portable analyzer features greet flexibility, high performance, simple operation, and is

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Toronto, Canada – GAO Instruments

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Toronto, Canada –

This high performance signal level meter, model A0500013, scans 125 channels at the same time and has the ability to display two channels simultaneously. It clearly displays all test results on a large character backlit TN LCD screen. The handheld meter offers a quick response without requiring warm-up and continuously works for five hours on a single charge. It operates over 46MHz to 870MHz frequency band and supports a level range of 30dBuV to 120dBuV. Featuring a portable and rugged design, high-speed measurement and simple operation, the portable level meter is one of the most popular instruments for general and integrated applications. Additionally, its price has been reduced to US$315.00 for a limited time only.

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Toronto, Canada – GAO Instruments

GAO Instruments’ RF vector analyzer, model A0200003, operates over the frequency range of 30kHz to 6GHz with a resolution of 1Hz. It performs four-channel simultaneous display for up to eight test curves. The analyzer offers an external video output port to connect with a display screen to convenient remote control and for demonstration purposes. Test results can be stored into nonvolatile memory, volatile memory and external disk. The output power ranges from -85dBm to 8dBm at an accuracy of ±1.0dB. Standard parallel port, serial port, GPIB port and VGA port are available for data exchange.

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Toronto, Canada –

For any sales inquires please contact:

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Toronto, Canada – GAO Instruments

This portable optical multi-meter, model A067001, supports a measurement range from -60dBm to 10dBm or -50dBm to 26dBm with a resolution of 0.01dB. It provides a stabilized light source using a dual-wavelength laser diode, with one port output. Different light source and power meter options are available for selection according to specific need. In addition, this compact optical multi-meter offers an auto-off function which kicks within ten minutes of inactivity.

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Toronto, Canada – GAO Instruments

This lightweight cable fault locator, model A0680005, can test line breaks and short circuit faults in twisted-pair cables, data cables, high frequency cables and coaxial cables. It accurately tests 25ohm, 50ohm, 75ohm and 100ohm cables and also provides an electronic map relevant to time domain. This rugged locator offers a pulse width from 270nm to 5.6µm and a wave range from 50m/µs to 300m/µs. Furthermore, the locator supports a minimum test distance of 2,000m in line short testing and 8,000m in line break testing.

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Toronto, Canada –

This high performance xDSL tester, model A0300032, assists in confirming whether a line is suitable for XDSL services. It also verifies connectivity from user to ISP service provider and conducts network layer tests after dial-up, including Ping, Ipconfig, Route and Tracert. The tester emulates a PC to test broadband IP lines or initiates PPPoE dial-up to test IP network connections and troubleshoot modem or PC problems. It performs PC emulation without an additional ADSL2+ or VDSL modem or PC. This tester boasts a large colorful TFT LCD screen with touch panel and a user-friendly interface supporting web browsing. It has a Windows CE operating system and a large memory capacity and can store up to 2000 ADSL test records.

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Toronto, Canada – GAO Instruments

This full-featured circuit fault tester, model A0310006, tests for breaks, shorts and defective insulation. It also checks the telephone state (on-hook or off-hook) and line voltage. The easy-to-use circuit fault tester detects wire breaks at distances of up to 9km within 1m tolerance. Tests can be performed even when line parameters are unknown on a line of known length. It offers three optional cable sizes for local communication lines including 0.32mm, 0.4mm and 0.5mm. This circuit fault tester can work continuously for ten hours when it is fully charged.

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Toronto, Canada –

This easy-to-use optical light source, model A0630006, boasts one to four output wavelengths including  650nm red source, 1310/1550nm wavelength for single mode and 850/1300nm wavelength for multi-mode fiber. It uses PF-LD emitters and features highly stable output power of ±0.05dB/15mins and ±0.1dB/8 hours. This optical light source provides modulation frequencies including CW, 270Hz, 1kHz and 2kHz. Together with GAO’s optical power meter, it acts as a perfect solution for fiber optic networks.

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Toronto, Canada –

This arbitrary waveform generator module, model A0710001, features easy integration, a frequency resolution function, high stability and an excellent performance-to-price ratio. The generator uses DDS, PFGA, and SRAM. The DDS CORE controller drives the arbitrary waveform generation with output repeat frequency range from 0.02Hz to 5MHz with 0.02Hz adjustment steps. It generates standard waveforms such as sine waves, square waves, saw-toothed waves, and pulse waves and frequency and amplitude modulated signal. Additionally, this arbitrary waveform generator can generate waveform documents or generate waveforms based on mathematical expressions.

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Toronto, Canada –

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Toronto,Canada

This handheld digital transmission analyzer, model A0300005, supports multi-task operation and performs background tests allowing the user to review previous records. It stores as many as nine test settings and twenty groups of test results in its on-board memory to avoid data loss in the event of power failure. The test results can be transmitted to a computer for storage, analysis and printing. This analyzer is configured with an internal rechargeable battery which enables continuous operation of more than eight hours.

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This easy-to-use desktop digital oscilloscope, model A0110002, incorporates mathematic functions, built-in FFT spectrum analysis, automatic parameter measurements and a waveform recording function. It offers an attractive maximum repeat sampling rate of 250MSa/s and equivalent single shot sampling rates of up to 50GSa/s. Additionally, the oscilloscope is able to apply high pass, low pass and band pass or band-stop digital filters to the waveform under test.

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About GAO Instruments

GAO Instruments (www.GAOInstruments.com) is a global leader in research, development and manufacturing of high performance telecommunication testers, electronic measurement instruments and other test and measurement devices.

Toronto, Canada – GAO Instruments recommends this compactADSL2+ test set to its popular product line. It supports all current ADSL standards and multiple protocols including PPPoE (RFC 2516), PPPoA-LLC/VC MUX (RFC 2364), RFC 1483/ RFC 2684 bridged and routed modes, Static IP and DHCP. This easy-to-use tester is an ideal solution for ILECs, CLECs, and sub-contractors, who are responsible for the installation, maintenance and troubleshooting of ADSL1, ADSL2 and ADSL2+ circuits.

This portable ADSL2+ test set, model A0300003, features modem emulation and ISP login function, beep alarms and LED indications. It is equipped with a replaceable, rechargeable lithium battery and a high resolution LCD with smart navigation mode and has a large memory capacity of 1024kB RAM to store test results and configurations. The handheld ADSL2+ test set measures and reports vital line parameters and carries out tests with a simple push of the “Auto Test” key.

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Toronto, Canada – GAO Instruments recommends this compact portable fiber optic power meter , specially designed for the installation, calibration and maintenance of telecommunications and CATV networks. It includes four function buttons on the front panel which implement four essential functions: wavelength selection, absolute measurement, reference measurement and fiber loss determination.

The highly accurate power meter, model A0670003, measures optical power at both 1310nm and 1550nm wavelengths. Its power input range is from 23dBm to -37dBm. This energy efficient fiber optic power meter features a compact size, lightweight, a high performance to price ratio and a quick response time without requiring warm-up.

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Toronto, Canada – GAO Instruments recommends this compact fiber fusion splicer , supporting both manual and automatic splicing modes. It is designed for single mode fiber, multi-mode fiber, dispersion-shifted fiber (DSF), non-zero dispersion-shifted fiber (NZ-DSF) and erbium-doped fiber (EDF). The single fiber fusion splicer features simultaneous X and Y views, a short splicing time of eight seconds and an impressive tube heating time (sleeve shrinking time) of only 40 seconds.

This fiber fusion splicer, model A0620004, includes 256x magnification, a reversible monitor and a control panel on each side. It supports up to 150 continuous splices and heats. The splicer detects the fiber end-face and adjusts parameters automatically. It automatically adjusts to environmental conditions using built-in temperature, humidity and pressure sensors which provide constant feedback signals to control the fusion arc temperature. In addition, this splicer has a large memory and can store 8,000 groups of splice results.

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Toronto, Canada – GAO Instruments recommends this compact PCI2712S parallel data acquisition card, at a reduced for clearance price of US$1.259.00 for a limited time only. The parallel data acquisition card is intended for transient signal recording, refined frequency synthesis, multi-channel parallel acquisition and time-phase-sensitive acquisition. With a maximum sampling rate of 20Msps, this unit is an ideal solution for the formation of multi-channel virtual instrument systems.

GAO Instruments’ parallel data acquisition card, model A0720002, uses advanced technologies and processes to enhance its high performance. This data acquisition card utilizes all-electronic calibration – there are no POTs on the card provided for adjusting. It offers four parallel channels, with an independent 20Msps 12-bit A/D converter and an independent programmable gain amplifier for each channel. The voltage signal acquisition ranges from 100mV to 20V; the sampling depth of each channel is up to 16Msps. The data acquisition card has three trigger modes: software, internal or external event triggers.

This PCI4712S parallel data acquisition board is a part of GAO Instruments’ popular product line of PCI cquisition boards.

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Toronto, Canada – GAO Instruments recommends this compact handheld super signal level meter, to its popular product line. This meter supports C/N measurement, voltmeter functions, spectrum analysis, return path measurement and data logging. The versatile meter verifies proper signal levels for any channel and is ideal for professional use in the CATV industry. It also measures and displays signal amplitude at a specific frequency or any carrier as defined.

This rugged super signal level meter, model A0500003, features a compact size, simple operation, high reliability and a high resolution LCD screen. It tests analog channels, digital channels (QAM) and FM channels efficiently and accurately and provides a broad frequency range. The peak-hold level measurement function in both LEVEL and SPECTRUM modes allows this signal level meter to detect the occasional disturbance. In addition, the average continuous operating time is about six to eight hours on a full charge. Overall, all of these capabilities make the signal level meter an invaluable tool for both indoor and outdoor testing.

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Toronto, Canada – GAO Instruments recommends this compact portable optical power meter, intended for absolute optical power and relative loss measurements in fiber optic applications. The power meter is an essential test instrument for telecommunications and CATV maintenance and is also suited for use in fiber optic test labs. It features a dust-proof and water resistant design making it ideal for on-the-spot measurements.

This rugged optical power meter, model A0670005, is capable of recognizing wavelengths automatically and thus saves test time and decreases potential errors. It tests optical power within the wavelength range of 800 to 1650nm and displays optical power in mW, dB and dBm. It also offers calibrated wavelengths including 850, 980, 1310 and 1550nm. The handheld optical power meter features a low battery warning and quick response time without requiring warm-up. It automatically shuts down to save energy after ten minutes of inactivity. The light weight optical power meter has optional interchangeable connectors such as FC, SC and ST. It works continuously for twenty-eight hours when it is fully charged.

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Toronto, Canada – GAO Instruments recommends this compact QAM analysis meter, operating over a wide frequency range of 5MHz to 870MHz with a resolution of 10kHz. It is intended for the installation and maintenance of Digital Video Broadcasting (DVB) systems. The quadrature amplitude modulation (QAM) analyzer measures and displays parameters such as channel power, MER and BER, the signal level of DVB networks at a specific frequency or any carrier within the system range.

This QAM analysis meter, model A0500005, complies with DVB-C and ITU J.83, Annex A standards. It features C/N measurement, return path tests, voltmeter functionality, spectrum analysis, data logging, analog TV measurement and DVB power measurements including QAM, QPSK and COFDM. The portable analyzer efficiently and accurately tests analog, QAM and FM channels and also functions as a voltmeter. It boasts intelligent power management, fast setup, alphanumeric input and easy transfer of test data to a PC or printer. This technologically advanced QAM supports up to 150 channels scan.

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Toronto, Canada – GAO Instruments recommends this compact portable SDH/PDH transmission analyzer, featuring a flexible soft-define simulated LED 10.4’’ TFT LCD, 128M memory capacity and current and saved alert status indication. This handheld SDH/PDH transmission analyzer can conduct bit error rate (BER) testing. Its compact architecture and high reliability make this transmission analyzer an ideal tool for the installation and troubleshooting of E1, DS3, STM-1/OC-3, STM-4/OC-12 and STM-16/OC-48 lines.

This SDH/PDH transmission analyzer, model A0300026, includes many functions such as performance analysis, anomaly/defect analysis, overhead analysis, pointer analysis, automatic tributary scan, automatic protection switching (APS), round trip delay measurement and E1 pulse mask analysis. Its firmware is upgradable via USB, RJ45 or RS232 interface. This analyzer conforms to G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. In anomaly/defect analysis mode, it inserts an anomaly/defect at the transmit end which is received at the sink end. Records and statistics of received anomalies/defects are displayed in tabular and graphic modes.

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Toronto, Canada – GAO Instruments recommends this compact handheld digital oscilloscope/DMM, which is specially designed for operation in hash industrial environments. This portable digital oscilloscope is a good assistant in trouble shooting during on-site inspection and is an ideal tool for engineers and technicians in the performance of complex measurements in sciences, medicine, engineering, telecommunications, and similar industries.

This handheld digital oscilloscope/DMM, model A0120016, provides all of the functionalities of a digital multi meter (DMM) including simultaneous multi-signal measurement and inspection. It has a sampling rate of 250MSa/s, or 60MHz, in dual channel mode. The oscilloscope features a large high resolution color LCD screen for easy view of test results. It works continuously for up to six hours on a single charge. Its rugged construction makes it suitable for use even in harsh environments.

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Toronto, Canada – GAO Instruments recommends this compact multi-functional ADSL 2+ tester, intended to test ADSL, ADSL2, ADSL 2+ and RE-ADSL 2 lines. It quickly determines the type of line under test and automatically loads the applicable ADSL line standard. Operators need only to enter the configuration, set the measurement margin and parameters and press the confirmation key to complete ADSL 2+ line parameter testing, modem simulation and ISP login.

This compact ADSL 2+ tester, model A0300010, performs TX and RX data packet accounting, PING testing and ISP login simulation. It also automatically transmits VPI, VCI, user name and password according to embedded configuration parameters input via Test Manager Pro software. The easy-to-use handheld tester supports a maximum measurement distance of 6.5km and stores one hundred test results that, along with configurations and margins, can be uploaded to a PC. Additionally, test results are clearly displayed on the high resolution backlit LCD screen, which also indicates alert conditions and the connectivity of WAN or LAN.
GAO Instruments offers a variety of ADSL testers for you to choose from.

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Toronto, Canada – GAO Instruments recommends this compacthandheld ADSL2+ tester , which also functions as a digital multi-meter (DMM) to test subscriber telephone connectivity and line parameters. It is ideal for ADSL engineers and technicians working in the maintenance of ADSL equipment. This multi-task supported tester tests ADSL physical layers, ADSL network layers and ADSL lines.

The easy-to-use ADSL2+ tester, model A0300006, implements line parameter testing including up and down channel rate, line attenuation, noise margin, transmission power and use rate of channels. It automatically detects line errors and displays warning for signal loss, frame loss, power loss and cell loss at both the proximal and remote ends. The ADSL tester has Ping, IPconfig, route, and tracert test capabilities. It stores up to seven test settings and one thousand test results making set-up and testing fast and efficient. Test results can be uploaded conveniently via an RS232 interface.

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Toronto, Canada – GAO Instruments recommends this compact handheld signal level analyzer , operating in the frequency range from 5MHz to 870MHz. It is specifically designed and manufactured for CATV engineers and technicians to facilitate installation and testing of CATV systems. This signal level analyzer measures CATV TILT, C/N and trunk cable voltage and also has functions such as channel plan selection, channel amending, channel sorting and channel editing.

This portable signal level analyzer, model A0500014, is small in size and light in weight and has a large LCD screen for clear display of test results. It has an auto-off timer for power conservation. The analyzer tests CATV signal levels in both channel (SCAN) and frequency (SPECTRUM) modes. In ‘SCAN’ mode, the analyzer is able to scan all channels and record signal levels in internal memory for later analysis. In ‘SPECTRUM’ mode, the analyzer conducts tests within the frequency range and provides spectrum displays. This handheld analyzer stores twenty-four groups of scanned data (up to 100 channels per group) and has two RF F-Type input ports. Windows compatible software is included for easy system set up.

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Toronto, Canada – GAO Instruments recommends this compact handheld fiber optic power meter, Ideal for engineers working on single mode optical cable networks, this well-designed meter conducts fast and accurate measurements of absolute light power in dBm and tests loss or relative power level in dB. This portable fiber optic power meter is used for the installation, debugging and maintenance of telecommunication networks, CATV networks and local network projects.

This handheld fiber optic power meter, model A0670011, features a compact size, light weight and low power consumption, which make it suitable for use in the field. It operates over a wavelength range from 780nm to 1700nm with an input range of -43dBm to 27dBm at an accuracy of ± 1%. The power meter boasts a large high resolution backlit LCD screen for clear view of measurement results and provides a 3000µm Ge optical detector. Both FC and SC connectors are available. This compact meter, powered by two NiMH AA batteries, works continuously for 20 hours on a full charge.

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Toronto, Canada – GAO Instruments recommends this compact handheld super signal level meter, to its popular product line.It provides such key functions as measuring and displaying the amplitude at a specific frequency or any carrier as defined by the user and conducts C/N measurement, spectrum analysis, auto testing and data logging. This affordable meter is widely used and favored by professionals in the CATV industry.

This super signal level meter, model A0500016, features FCC standard limit testing, quick charging, transmission and reflectivity characteristic testing and automatic timing measurements. It operates at a frequency range of 46MHz to 870MHz and offers an interface for connection with a PC and an easy-to-use printer. The meter’s peak-hold level measurement in LEVEL and SPECTRUM mode detects the occasional fluctuation efficiently and accurately. The signal level meter provides a broad frequency range and conducts return path measurements. Furthermore, this meter effectively tests analogue channels, digital channels (QAM) and FM channels with high accuracy.

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Toronto, Canada – GAO Instruments recommends this compact digital insulation resistance tester , which tests insulation resistance up to 2000MΩ. It accurately measures insulation integrity on all kinds of electric equipment such as transformers, electro-motors, cables, switches and other wiring. The intelligent digital device is specially designed to predict, prevent and identify insulation failures that may cause appliance failure, stop production and create power problems or even put lives at risk.

GAO Instruments’ affordable digital tester, model A0300029, has a built-in high power voltage generator which enables the output testing voltage to be adjustable over 250V, 500V or 1000V depending on requirements. It measures alternating current and voltage below 750V AC. Due to its multiple test voltages, this digital insulation resistance tester is ideally suited for such applications as troubleshooting, commissioning and preventative maintenance. A backlit LCD allows visibility of test results under bright sunlight or in poorly lit environments. Encapsulated in a rugged and moulded plastic case, this high performance digital insulation resistance tester is an invaluable tool for field testing.

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Toronto, Canada – GAO Instruments recommends this compact fiber optic power meter , which provides online help and offers hints or warnings automatically when an operation fails. It is fit for the installation, calibration and maintenance of the telecommunication and CATV networks as well as LAN, FDDI and ATM optical systems. The meter is also used for optical identification and fault locating of single and multimode fibers.

This compact power meter, model A0670002, tests optical power in a wavelength range of 1310nm to 1550nm at an accuracy of ±5%. It has self-test and self-check functions for both its internal hardware and parameters. The power meter is equipped with a large graphic LCD screen which displays battery status, operating mode, name of selected item, function prompt area and current function selection. Measurement results can be automatically transformed into report forms and printed via an RS232 interface or transmitted to a PC for unified management. Its portable design and simple operation make it ideal for field operation.

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Toronto, Canada – GAO Instruments recommends this compact handheld datacom analyzer,a durable tool suitable for on-the-spot measurements. The cost-effective and practical analyzer is an ideal tool for R&D, production, equipment installation, acceptance testing, daily maintenance and service verification. It is used to verify the quality-of-service of datacom transmission channels in access networks, transmission networks, digital data networks and private communication networks.

This datacom analyzer, model A0300009, offers V.24, V.35, V.36, X.21, RS-449, RS-485, EIA-530 and EIA-530A interfaces and can be configured to DTE or DCE and ASYNC or SYNC mode. It monitors and controls handshaking signals and supports measurements of error blocks and clock slips. In SYNC mode, the Rx and Tx clock sources are either internal or external and triggered with rising or falling edge detection. The advanced analyzer has a large memory capacity and stores up to four groups of test results; the test results can be uploaded to a PC via a serial port. Test Manager™ software is included to support further analysis, assembling, filing, and reporting of test results. The embedded software can be upgraded via the serial port.

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Toronto, Canada – GAO Instruments recommends this compact synthesized signal generator , operating at frequencies between 250kHz and 4GHz which covers all of the common RF bands. With high accuracy and spectral purity, it can be used for multiple environments for various purposes. This optimized signal generator is especially useful for such applications as scientific research, production and RF testing.

The RF synthesized signal generator, model A0200001, boasts abundant modulation functions including amplitude modulation, frequency modulation, phase modulation and pulse modulation. It features a wide frequency coverage, excellent spectral purity, a built-in modulation signal generator and a GPIB remote control function. On UHF receivers the generator is able to measure selectivity, sensitivity, inter-nodulation distortion, AM rejection, AGC response, audio hum, noise and distortion and STAND ratio. Its out power range is from -136dBm to 7dBm. The digital step sweep and list sweep functions provide flexibility and helps achieve control over output frequency and power.

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Toronto, Canada – GAO Instruments recommends this compact handheld data communication tester , designed for the installation, maintenance and trouble-shooting of digital networks. This rugged tester carries out both framed and unframed tests on various equipment such as primary multiplexers, digital cross connects, automatic protection switches and circuits operating at a speed between 50bit/s and 2048kbit/s.

This portable data communication tester, model A0300002, is small in size and light in weight and consumes little power. It supports synchronous or asynchronous data transmission and generates and monitors PCM30, PCM30 CRC, PCM31 and PCM31 CRC frame structures. An error analysis function allows histograms of error or alarm data to be quickly and easily displayed. This compact tester integrates V.24, V.35, V.11, X.21 interfaces, G.703 Co-dir 64kbit/s interface and G.703-2Mkbit/s interface; accommodations for future interfaces have also been considered. Additionally, the measuring conditions can be stored in memory to prevent data loss in the event of power failure.

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Toronto, Canada – GAO Instruments recommends this compact mini fiber optic power meter – an ideal tool for the debugging and maintenance of telecommunication networks. It is intended for CATV engineers and technicians working with single-mode fiber optic cables, CATV networks, or local networks. This compact power meter is equipped with a large character LCD screen, which makes it easy to monitor the processes of measurement and testing.

This mini fiber optic power meter, model 3026, tests optic power within the wavelength range of 780nm to 1700nm and has a full range accuracy of ±0.26dB at wavelengths of 1300nm, 1310nm and 1550nm. It features a rugged design and supports a power input range from -43dBm to 27dBm. The easy-to-use fiber optic power meter provides FC, SC, and ST connectors and supports continuous operation of more than twenty hours when it is fully charged. In addition, this fiber optic power meter offers a quick response without requiring warm-up, it consumes little power, and has an auto-off function.

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Toronto, Canada – GAO Instruments recommends this compact mini handheld optical power meter,intended for absolute power and relative loss measurements of fiber optics. This handheld meter is suitable for use in applications such as telecommunication and CATV maintenance and in fiber optic test labs.

This optical power meter, model A0670006, is small in size and light in weight. It offers such functions such as automatic self calibration, auto-off and low battery warning. The affordable power meter provides a large high resolution LCD screen and displays optical power in mw, dB and dBm. Its design of resistance to damp, dust and water makes it suitable for field testing use. This meter, used in conjunction with GAO Instruments’ mini handheld light source (A0630001), offers a portable, highly useful testing pair. This easy-to-use mini optical power meter can work continuously for up to 360 hours with three 1.5V batteries.

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Toronto, Canada – GAO Instruments recommends this compact portable optical multi meter,specially designed for telecommunication and CATV maintenance, passive device manufacturing and for lab testing and research. The meter’s optical light source offers multiple optional wavelengths at 850nm, 980nm, 1300nm, 1310nm, and1550nm to meet various requirements. Its multi-functional design, easy operation and high stability make it a valuable tool for testing professionals.

This rugged multi meter, model A0670010, integrates functions of both an intelligent optical power meter module and a highly stable light source module which allows users to carry out loop-around tests with a single testing device. Both multimeter modules can work independently via function switch operation making field-testing convenient and flexible. The meter has a high resolution LCD for clear display and a RS232 interface for data exchange.

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Toronto, Canada – GAO Instruments recommends this compact fiber optic identifier , which efficiently and accurately identifies the traffic direction and frequency tone of an optical fiber and displays results through an illuminated LED. It detects signal frequency tones of 270Hz, 1kHz and 2kHz. The identifier is an essential tool for the installation and maintenance of telecommunication and CATV systems and is suitable for use in test labs and other fiber optic applications.

This portable optical fiber identifier, model A0640002, does not require opening a fiber at a splice point for identification and thus avoids interrupting service. It features low bending loss and efficient output, provides an easy-to-replace adaptor and displays three levels of signal intensity. The compact instrument identifies optical signals at wavelengths from 900 to 1650nm.
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Toronto, Canada – GAO Instruments recommends this compact portable 10/100/1000m Ethernet analyzer,an ideal solution for analyzing and troubleshooting Ethernet networks during the processes of construction or maintenance. It supports multi-network testing, bit error testing of ISO layer1-3 and comprehensive network monitoring. The analyzer is able to test data rates and performance metrics including throughput, latency, frame loss and back-to-back frames. This advanced analyzer generates constant, burst or ramped traffic loads and simulates multi-stations up to 500.

The 10/100/1000M Ethernet analyzer, model A0300004, has two working modes: dual-port mode and remote testing. In dual-port mode, most of tests can be completed with the single analyzer; in remote testing mode, long distance tests can be carried out with two Ethernet analyzers placed at the two ends of a WAN.  This handheld analyzer includes an electrical interface and an optical interface operating in either single or multi-mode. It also has a USB port to conveniently upload stored data and through which embedded firmware can be upgraded. The easy-to-use Ethernet analyzer displays text and graphics in up to 16 bits color on its TFT LCD screen. Overall, prominent functions, portable size and user-friendly design make the analyzer fit for various complex testing environments.

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Toronto, Canada – GAO Instruments recommends this compact arbitrary waveform generator and frequency counter , which is commonly used in most electronic labs. It directly reads the waveform data files produced by Tektronix oscilloscopes or Tektronix waveform editor software and displays the waveform. The waveform generator uses DDS technology so that it has advantages of high frequency accuracy, high waveform resolution, high reliability and wide software support.

This affordable USB waveform generator and frequency counter, model A0200002, features one channel of arbitrary waveform output, 8 bit output, synchronized signal output and two input channels for counter/frequency measurement, 8 bit input and external trigger input. Users can arbitrarily edit the waveform using a mouse, set parameters such as amplitude, frequency and offset and can also choose regular waveforms including Sine, Square, Triangle, Saw-tooth, TTL, white Noise, Gauss Noise, Trapezoid, Exponent, AM and FM. The generator is shipped with both SDK and API and can be easily integrated or embedded into other auto-measuring systems. The PC transfers the waveform data into the memory of the signal generator via USB bus; the ID counter cycles and sends the period waveform data to the DAC circuits. Its DDS circuit produces the corresponding DAC refreshing clock.

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Toronto, Canada – GAO Instruments recommends this compact parallel data acquisition module,which allows quick, easy data acquisition and control to be carried out using a PC. The data acquisition module provides demo source code for common development platforms. It is ideal for use by anyone from student to professional researcher or engineer who works with PC104 embedded systems.

GAO Instruments’ 12bit dual-channel data acquisition module, model A0710006, includes two independent programmable gain channels and three triggering modes: manual, external and internal triggering. Internal triggering conditions include adjustable level rising and falling edge triggers. The card is small-sized and features stacked connection and bus drive. This data unit achieves ±40mV to ±40V voltage signal acquisition. Its sampling rate ranges from 1k to 20M with a low inter-channel phase difference of less than 1°.

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Toronto, Canada – GAO Instruments recommends this compact handheld signal level meter, operating over 46MHz to 870MHz frequency band. Its price has been reduced to US$299,00 for a limited time only. The meter is intended for the installation and maintenance of CATV systems and also for the maintenance of digital, analog or bilateral networks. It has been widely used to test CATV signal levels in both channel and frequency modes and is especially useful for CATV stations due to its ability to display two channels simultaneously.

This multi-functional signal level meter, model A0500013, measures parameters including CATV TILT, C/N and trunk cable voltage effectively and accurately. It is able to scan 125 channels at the same time. The handheld meter offers a quick response without requiring warm-up and supports a level range of 30dBuV to 120dBuV. It displays all test results clearly on a large character backlit TN LCD screen and continuously works for five hours on a single charge. The portable signal level meter features a portable and rugged design, high-speed measurement and simple operation that make it one of the most popular instruments for general and integrated applications.

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Toronto, Canada – GAO Instruments recommends this compact Radio Frequency (RF) signal generator,used in research, development and production testing of AM/FM receivers, civil-band transceivers, radio remote-controlled devices such as toys and wireless telephones. It has a frequency synthesizer to enable the output signal to be determined very accurately and frequencies to be entered directly from a keypad or via remote control.

The innovative RF signal generator, model A0400001, is a CPU-controlled, highly accurate instrument working over a wide frequency range of 300kHz to 300MHz. It provides AM and FM modulation types and supports the output levels varied in 0.1dB step. With optional RS-232 and IEEE-488 (GPIB) interfaces, the generator can be formed into an automatic test system under the control of a host computer combined with other instruments.

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Toronto, Canada – GAO Instruments recommends this compact Optical Time-Domain Reflectometer (OTDR) ,It is commonly used in the manufacturing, construction and maintenance of fiber optic networks. The OTDR is an ideal solution for engineers and technicians to measure connection or transmission loss and locate faults or breaks in fiber optics.

GAO Instruments’ rugged OTDR, model A0500001, features a short, 1.6m event dead zone, 0.1m sample resolution with 65k sampling points and a pulse width of 10ns to 20480ns. The high performance OTDR reads and writes files in Bellcore GR196 file format. It transmits data to a PC via serial or parallel interface and offers a large memory capacity for data storage. A USB interface is also provided for data transmission. This optical time domain reflectometer has a large color LCD screen with touch panel to clearly display signal analysis results. What’s more, the OTDR continuously operates for over eight hours when it is completely charged; battery levels are displayed accordingly.

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Toronto, Canada – GAO Instruments recommends this compact E1/Datacom tester,intended for the installation, acceptance testing and daily maintenance of digital networks. The E1/Datacom tester performs channel tests, alarm analysis, signal analysis and fault location and provides various protocol converters with one-way and bi-directional bit-error-rate (BER) test functions.

This portable E1/Datacom tester, model A0300021, features a rugged, handheld design, a high resolution backlit LCD screen and simple operation. It offers such functions as in-service framed and unframed testing, CAS and CCS signaling generation and monitoring, extensive error and alarm generation, detection and indication. The tester saves and recalls ten user-defined setups and ten sets of results, which can be uploaded and printed via Test Manager Software. Its embedded software can be upgraded via an integrated RS232 interface. It works continuously for up to six hours on a single charge with built-in rechargeable batteries and can be charged via a battery adapter. In addition, this tester runs under Windows 98, ME, 2000, XP and NT operation systems.

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Toronto, Canada – GAO Instruments recommends this compact portable digital insulation tester ,used for testing the safety of electric equipment such as transformers, electro-motors, cables, switches and home appliances and insulation materials. This handheld digital insulation tester is designed to perform insulation resistance measurements, continuity measurements, AC/DC voltage measurements and frequency measurements.

This easy-to-use digital insulation tester, model A0310005, conducts continuity measurements using either 200mA test current or 7mA test current. It clearly displays test results on a high-definition backlit LCD screen and stores up 1000 results. The practical tester features an automatic turn-off function and double insulation protection. An RS232 interface is provided for data exchange. To meet various requirements for insulation resistance testing, the output voltage can be set to 50V, 100V, 250V, 500V or 1000V. Additionally, with an IP54 protection rating, this digital insulation tester works properly even in harsh environments.

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Toronto, Canada – GAO Instruments recommends this compact cable fault locator,This CATV meter is intended to locate radio frequency (RF) cable faults such as short circuits, open circuits, and high resistance joints and splices.  It determines cable faults by transmitting an electrical energy pulse that propagates at a certain speed depending on the cable type.

The portable TDR cable fault locator, model A0500006, features a rugged design, high accuracy and stability and simple operation. It can optionally be used to calibrate cable type; instructions for each step are indicated automatically on the screen. Upon analysis, the fault locator automatically displays the fault type and the distance to the fault. This cable fault locator has a maximum test range of 1200 meters with a resolution of 0.001. In addition, it is able to test eight types of cables such as 50ohm and 75ohm Co-axial cable.

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Toronto, Canada – GAO Instruments recommends this compact cable fault locator, which uses TDR technology and has cable parameter test functions. The cable fault locator tests for line breaks and short circuit faults in twisted-pair cables, data cables, high frequency cables and coaxial cables. It is also used to locate and reveal cable damage and terminal impedance failure. The high performance cable fault locator is commonly used in HFC systems and such applications as electric wire and cable manufacturing.

GAO Instruments’ portable cable fault locator, model A0680005, accurately tests 25ohm, 50ohm, 75ohm and 100ohm cables and provides an electronic map relevant to time domain. It supports a test distance of at least 2,000m in line short testing and 8,000m in line break testing. The rugged fault locator offers a pulse width from 270nm to 5.6µm and a wave range from 50m/µs to 300m/µs. Additionally, it features a high definition backlit LCD screen and simple, automatic operation, a small test blind zone of less than 2m and a comparison test function.

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Toronto, Canada – GAO Instruments recommends this compact circuit fault tester ,developed for the fault testing of local telephone circuits. The high performance fault tester is packed with rich functions such as automatic line state assessment, field calibration, loop resistance and dielectric resistance measurement, and line alignment which. Test can be performed even when line parameters are unknown on a line of known length.

This full-featured circuit fault tester, model A0310006, is suitable for telecom operating staff, line attendants and other telecommunication technicians. It tests for wire breaks, shorts and defective insulation. It also checks the telephone state (on-hook or off-hook) and line voltage. The easy-to-use circuit fault tester detects wire breaks at a distance of up to 9km within 1m tolerance. It offers three optional cable sizes for local communication lines: 0.32mm, 0.4mm and 0.5mm. This circuit fault tester works continuously for ten hours when fully charged.

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Toronto, Canada – GAO Instruments recommends this compact optical-electrical signal level meter, with multiple practical functions. It displays constellation diagrams and optical pictures and functions as an optical power tester and EVM  and provides DVB measurement. This dual-wavelength meter operating at 1310nm and 1550nm is ideally suited for the HFC networks. It also conducts digital signal tests on digital signal power, power/Hz and QPSK signal power.

GAO Instruments’ digital optical electric signal level meter, model A0640001, includes a video input port and an audio input port. It measures both forward directional signals and reverse transmission signals. The level meter supports quadrature amplitude modulation (QAM) and a dynamic power range from -30dBm to 20dBm. 16 QAM, 32 QAM, 64 QAM, 128 QAM and 256 QAM are available for selection. This dual-wavelength signal level meter has a TFT 5’’ LCD screen on which clearly displays analog channel analysis level, V/A, C/N, TILT, spectrum, TV pictures and measurement results. These attractive features make it an excellent signal level meter.

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Toronto, Canada – GAO Instruments recommends this compact dual-wavelength laser source– a high performance device specifically designed to deliver stable laser signals of various wavelengths to evaluate the transmission quality of fiber optic networks. It is widely used in LAN, WAN, CATV and remote optical networks. The laser source also assists in determining fiber type and tests continuity as well as optical loss. Used in conjunction with GAO’s 800 optical power meter, the two make an ideal pair for fiber optic applications.

This portable, dual-wavelength laser source, model A0670016, emits stable dual-wavelength laser signals and performs accurate fiber optic testing. Its working wavelength is switchable between 1310nm and 1550nm (±20nm). The meter features low voltage warning, automatic power off, and simple button operation. An LED status indicator is provided for output wavelength display. This laser source can deliver five hours continuous operation on a single charge and supports FC, ST, SC adapters.

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Toronto, Canada – GAO Instruments recommends this compact smart fiber optic laser light source ,intended to perform fast and accurate measurements on long-distance and local optical networks. The handheld light source measures the loss in an optical fiber at a range of up to 200km when used in conjunction with a Laser Power Meter. It is an ideal solution for use in field or lab applications.

This well-designed laser light source, model A0630010, offers high stability for accurate fiber optic testing and provides stable power output at a wavelength of 1310nm or 1550nm through a single output connector; its power output is adjustable. The light source can operate in either continuous wave mode or 2kHz modulated mode for up to twelve hours without service interruption. It operates on a single 9V battery and gives a low battery indication when requiring battery replacement.

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Toronto, Canada – GAO Instruments recommends this compactoptical fiber identifier, which is specifically designed for the use in the construction and maintenance of optical fiber communication and optical fiber CATV systems. The portable fiber identifier accurately distinguishes optical signals in fibers with service running while avoiding undo pressure on the optic fibers. It identifies multiple signal frequencies such as 270Hz, 1kHz and 2kHz. This optical fiber identifier, model A0640004, is able to identify H 0.25 bare fiber and H0.9 / H2.5 /H3.0 tail fiber. It operates at a wavelength range of 800nm to 1700nm and works continuously for at least eight hours on a full charge. The portable identifier has an LED to indicate low power and display the intensity of optical signals.

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Toronto, Canada – GAO Instruments recommends this compactmulti-functional ADSL tester, which supports ADSL 2+ (G.992.5), ADSL2 (G.992.3) and RE-ADSL (Annex L) and is also downwards compatible with ADSL (G.DMT, G.Lite, T1.43) line standards. It is intended for ADSL/ADSL 2+ installation, maintenance and measurement. This powerful tester is commonly used for field testing including upstream or downstream rate measurement, error count, DMM, MODEM simulation, and ping and trace testing.

This multi-functional ADSL tester, model A0300011, supports a maximum transmission distance of 6.5km. It determines the type of an ADSL line being tested, automatically matches the ADSL line standard and then carries out tests accordingly with a simple push on the “Auto Test” key. Test results can be uploaded, saved and printed through Test Manager Pro Software.The ADSL tester’s embedded software is upgradable via an integrated RS-232 interface. It offers a high resolution backlit LCD screen and displays ADSL line connections on a real-time basis. What’s more, the ADSL tester can be powered using an automobile adapter.

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Toronto, Canada – GAO Instruments recommends this compact signal level meter, equipped with an audio output port and a built-in speaker. It is specially designed for CATV system maintenance and is optimized to analyze signals from different sources for various applications such as the installation and maintenance of mobile telecommunications systems, cellular and cordless phone systems, CB paging, paging systems, cable and satellite TV systems as well as antenna sites.

GAO Instruments’ well-designed signal level meter, model A0500021, supports level, V/A, Tilt and Trunk level testing. It scans and displays up to 160 channels and can test two channels simultaneously. The light weight meter operates in the frequency range of 46MHz to 860MHz at a frequency step of 50kHz, 1MHz, 10MHz or 100MHz. It offers level measurement ranges of 20dBuV to 50dBuV at an accuracy of ±2dB. The signal level meter works continuously for more than six hours on a single charge. These features enable this signal level meter to accurately measure signal levels and easily conduct analysis of signals over a wide frequency band.

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Toronto, Canada – GAO Instruments recommends this compacthandheld optical Multi-Meter,intended to carry out multiple tests on fiber optic systems with a single meter. It is a perfect combination of an optical power meter module and an optical light source module, yet the device remains compact and light weight. The multimeter implements loop-around tests by using both modules. Each of the modules can also function independently and switching between the modules is accomplished easily via menu selection. It can be built or tailored according to different requirements.

This optical multi-meter, model A0670017, provides a stabilized light source of dual-wavelength laser diode, with one port output. It supports a measurement range from -60 to 10dBm or -50 to 26dBm with a resolution of 0.01dB. Calibrated wavelengths are 850nm, 1300nm, 1310nm, 1490nm and 1550nm. The intelligent multi-meter offers an auto-off function that it will turn off automatically within ten minutes of inactivity. This complementary combination of these modules make the testing of fiber optics networks more convenient as only one test instrument is required. Different light sources and power meters are available for users to select according to their specific needs.

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Toronto, Canada – GAO Instruments (www.GAOInstruments.com) has announced the availability of its compact single fiber fusion splicer specifically designed for single mode fiber, multi-mode fiber, dispersion-shifted fiber (DSF), non-zero dispersion-shifted fiber (NZ-DSF), and erbium-doped fiber (EDF). The single fiber fusion splicer detects the fiber end-face and adjusts parameters automatically. It features a short splicing time of eight seconds, and an impressive tube heating time (sleeve shrinking time) of 40 seconds.

This user programmable single fiber fusion splicer, model A0620004, boasts simultaneous X and Y views, 256x magnification and a reversible monitor and a control panel on each side. It supports both manual and automatic splicing modes and supports up to 150 continuous splices and heats. The typical splice loss using this innovative fusion splicer is only 0.1dB to 0.3dB. The single fiber fusion splicer has a large memory and is able to store 8,000 groups of splice results. The splicer automatically adjusts to environmental conditions using built-in temperature, humidity and pressure sensors which provide constant feedback signals to control the fusion arc temperature.

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Toronto, Canada – GAO Instruments recommends this compactsignal level analyzer ,operating in the frequency range of 5MHz to 870MHz. It features a rugged design and simple operation and measures CATV TILT, C/N and trunk cable voltage. The portable analyzer is commonly used to facilitate CATV field engineers and technicians in the installation and testing of CATV systems.

This handheld signal level analyzer, model A0500015, provides a level range of 30dBμV to 115dBμV. It tests CATV signals accurately in both channel (SCAN) and frequency (SPECTRUM) modes. In “SCAN” mode, the analyzer scans all channels and records signal levels in internal memory for later analysis. In “SPECTRUM” mode, the analyzer displays spectrums and conducts tests within certain frequency ranges. The rugged analyzer scans up to 125 channels at a speed of 30 channels per minute and stores twenty-three groups of scanned data (up to 100 channels per group). This signal level analyzer possesses a 128X64-matrix backlit LCD screen for clear display of test results.

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Toronto, Canada – GAO Instruments recommends this compact portable fiber optic power meter, with a high performance to price ratio. This optical power meter is specially designed for the installation, calibration and maintenance of telecommunications and CATV networks. Its compact size, lightweight and easy operation design makes it very convenient to be carried around for field testing. This power meter measures optical power on 1310nm and 1550nm wavelength signals using a button between to switch between the two states.

The highly accurate power meter, model A0670003, includes four function buttons on the front panel which implements respectively four essential functions: wavelength selection, absolute measurement, reference measurement and fiber loss determination. This energy efficient fiber optic power meter features a quick response time without requiring warm-up. The input range is from 23dBm to -37dBm. It is equipped with a high resolution LCD screen and is powered by two Ni-MH AA batteries.

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Toronto, Canada – GAO Instruments recommends this compact CATV cable fault locator , which tests underground cables to discover impedance break points and then locate and reveal cable damages, tie-in dampness, and terminal impedance failures in HFC systems. This locator is able to automatically locate any kind of RF cable fault such as short circuits, open circuits or high resistance joints and show the distance of the fault.

GAO Instruments’ CATV cable fault locator, model A0500007, features a high tolerance for noise interference. It utilizes Time Domain Reflection (TDR) technology to display time domain reflection on its LCD screen and uses analysis software to analyze the status of a cable. The device can connect to a PC to upload files for data analysis. The CATV cable fault locator can be used as an amplitude marker to indicate impedance characteristics; it accurately tests 25, 50, 75Ohm and 100Ohm impedance cables with a length of up to 2km. The locator has a "Self-Study" function enabling it to accumulate intelligence after calibrating and testing a given type of cable of a certain length so as to achieve high accuracy in subsequent tests on similar cables. The cable fault locator provides an electronic map relevant to a time domain picture so that faults can be detected easily.

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Toronto, Canada – GAO Instruments recommends this compact SDH/PDH transmission analyzer , with a flexible soft-define simulated LED 10.4’’ TFT LCD, touch screen for current and saved alarm status indication. Its compact architecture and high reliability make this transmission analyzer an ideal tool for the installation and troubleshooting of E1, DS3, STM-1/OC-3, STM-4/OC-12 and STM-16/OC-48 lines. This SDH/PDH transmission analyzer also conducts bit error rate (BER) testing.

This practical SDH/PDH transmission analyzer, model A0300026, includes multiple functions such as performance analysis, anomaly/defect analysis, overhead analysis, pointer analysis, automatic tributary scan, automatic protection switching (APS), round trip delay measurement and E1 pulse mask analysis. The performance analysis conforms to G.821, G.826, G.828, G.829, ZM.2100 and M.2101 international standards. While conducting anomaly/defect analysis, it inserts an anomaly/defect at the transmit end and receives it at the sink end. Records and statistics of received anomalies/defects can be displayed in tabular and graphic modes. Test results can be exported to a USB drive. The SDH/PDH transmission analyzer offers a memory capacity of 128M to store test results and configurations and can work continuously for six hours on a single charge. Its firmware is upgradable via USB, RJ45 or RS232 interface.

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Toronto, Canada – GAO Instruments recommends this compact T1 bit error rate tester,performing error code testing at rates from 50b/s to 2048kb/s. It conducts 2M online monitoring making it an invaluable tool for routine maintenance, repair and operation monitoring of communication devices. This T1 BER tester incorporates a special remote monitoring function ensuring convenient real time monitoring.

GAO Tek Inc.’s T1 BER tester interface support includes G.703, V.24/RS232, V.35, V.36/RS449, X.21, EIA530/530A and RS485/RS422. It boasts such functions as NX64 BER testing, histogram analysis, propagation delay, pulse mask measurement and E1 jitter measurement. The T1 BER tester is able to display received Data/FAS/MFAS words and send framed words including Sa bit. A high impedance monitor, a simulator and a Bridge are selected as the termination. This tester has 256kb RAM memory for results storage and has upgradable software via RS232 interface. In addition, alarm detection and status of

Toronto, Canada – GAO Instruments recommends this compact ADSL 2+ tester, which is intended to test ADSL, ADSL2, ADSL 2+ and RE-ADSL 2 lines. This handheld tester quickly determines the type of line under test and automatically loads the applicable ADSL line standard. It features a quick response time, reliable performance and ease of use. The operator need only enter the configuration, set the measurement margin and parameters and, with the press of a single key, ADSL 2+ line parameter testing, modem simulation, and ISP login is conveniently completed.

This ADSL 2+ tester, model A0300010, performs TX and RX data packet accounting, PING testing and ISP login simulation. The tester also automatically transmits VPI, VCI, user name and password according to embedded configuration parameters which are input via Test Manager Pro software. Test results are clearly displayed on the tester’s high resolution, backlit LCD screen, which indicates alert conditions and the connectivity of WAN or LAN. The high performance ADSL 2+ tester supports a maximum measurement distance of 6.5km and stores over one hundred test results that, along with configurations and margins, can be downloaded to a PC.

GAO Instruments offers a variety of ADSL testers for you to choose from.

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Toronto, Canada – GAO Instruments recommends this compact handheld signal level analyzer, specifically designed and manufactured for CATV engineers and technicians to facilitate installation and testing of CATV systems. This signal level meter measures CATV TILT, C/N and Trunk Cable Voltage. Its simple operation and light weight design makes it ideal for field use.

GAO Instruments’ signal level analyzer, model A0500014, tests CATV signal levels in both channel (SCAN) and frequency (SPECTRUM) modes. In ‘SCAN’ mode, the analyzer scans all channels and records signal levels in internal memory for later analysis. In ‘SPECTRUM’ mode, the analyzer carries out spectrum displays and tests within a frequency range of 5MHz to 870MHz. The signal level analyzer stores twenty-four groups of scanned data (up to 100 channels per group) and boasts two RF F-Type input ports. It offers a large LCD screen for a clear display of test results and has functions such as auto-off time setup, channel plan selection, channel amending, channel sorting and channel editing. Windows compatible software is included for easy system set up.

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Toronto, Canada – GAO Instruments recommends this compact super signal level meter , which is favored by professionals in the CATV industry.It accurately tests analog channels, digital channels (QAM) and FM channels. The signal level meter supports CATV signal measurement, C/N measurement, return path measurement, auto test, data logging, spectrum analysis and voltmeter functions.

The signal level meter, model1185B, operates at two optional frequency ranges – 46MHz to 870MHz and 5MHz to 870MHz. It provides flexible operation for measuring and displaying the amplitude of a signal at a specific frequency defined by the user. In LEVEL and SPECTRUM test modes, the meter offers a peak-hold function for level measurement which enables it to detect occasional disturbances efficiently. This signal level meter is able to conduct FCC standard limit testing and transmission as well as reflection characteristic testing; it also verifies proper signal level of any channel.

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Toronto, Canada – GAO Instruments recommends this compact  multi-functional portable network tester, the  with PPPoE dialling function. This network tester combines thesatisfiesincorporates all of the practical functions of many advanced testing instruments such asa Time-Domain Reflectometer (TDR) and Digital Multimeter (DMM). It supports network layer tests such as Ping, Ipconfig, Tracert, and Route and tests the cable length and various cable faults within a maximum distance of 150m. The highly rugged tester also measures AC or DC voltage, line capacitance and line insulation. Overall, it is an ideal solution to openfor the installation and to maintainenance of the xDSL operations. 

             
The portable network tester is equipped with an RJ45 interface for both network and physical layer testing. It four types of non-shielded cables and 4 types of shielded cables which include CAT5, CAT5E and CAT6. The network tester displays the test results clearly in its color TFT LCD screen using a Windows-like interface. It is powered with an external adapter or by a built-in Li-ion cell and supports eight hours continuous operation on a charge. The network tester’s embedded software is able to be automatically  has the ability to upgraded.  In addition, this portable network tester provides a 20MB memory capacity and allows users to download test results directly to a PC or a USB diskdrive.

Please visit http://www.GAOInstruments.com for more information on model A0300014 or to purchase this product online. 

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Toronto, Canada – GAO Instruments recommends this compact digital insulation resistance tester, The intelligent digital device is specially designed to predict, prevent and identify insulation failures that may cause appliance failure, stop production and create power problems or even put lives at risk. It accurately tests insulation integrality on all kinds of electric equipment and insulation materials found in equipment such as transformers, electro-motors, cables, switches and other installed wiring.

The affordable digital tester, model A0300029, tests insulation resistance up to 2000MΩ. With a built-in high power voltage generator, the output testing voltage is adjustable over 250V, 500V or 1000V depending on requirements. Alternating current can be measured; voltage below 750V AC can be tested. Due to its multiple test voltages, this advanced digital insulation resistance tester is ideal for many troubleshooting, commissioning, and preventative maintenance applications. The well-designed tester offers a large backlit LCD screen making it suitable for use under bright sunlight or in poorly lit environments. Encapsulated in a rugged and moulded plastic case, this high performance digital insulation resistance tester is an invaluable tool for field testing.

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Toronto, Canada – GAO Instruments recommends this compact handheld fiber optic power meter, used for the installation, debugging and maintenance of telecommunication networks, CATV networks and local network projects. The well-designed meter conducts fast and accurate measurements and is ideal for engineers working on single mode optical cable networks. The meter features a compact size, light weight and low power consumption, which make it suitable for use in the field.

This portable fiber optic power meter, model A0670011, boasts a large high resolution backlit LCD screen for clear view of measurement results. It operates over a wavelength range from 780nm to 1700nm with an input range of -43dBm to 27dBm at an accuracy of ± 1%. This compact meter is powered by two NiMH AA batteries. Both FC and SC connectors are available for use. It also provides a 3000µm Ge optical detector. This cost-effective optical power meter works continuously for 20 hours on a full charge.

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Toronto, Canada – GAO Instruments recommends this compact optical talk set: an excellent combination of a digital optical phone and a stabile light source. The optical talk set effectively assists in operations of installation, optical testing, maintenance and fiber attenuation value testing in data networks, CATV and telecommunication networks. It is also suitable for research of fiber optic communications.

GAO Instruments’ optical talk set, model A0650001, operates at either 1310nm or 1550nm wavelengths; it is capable of online display and online call. This optical talk set has a high quality connection, carries out full-duplex communication which will not be affected by distance. Equipped with a large, seven-color, backlit LCD screen, the talk set offers a clear display of operations. The output power is from -5dBm to -7dBm. Modulation frequencies offered include 270Hz, 1kHz, 2kHz and CW. The optical talk set has a rechargeable battery and operates continuously for five hours.

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Toronto, Canada – GAO Instruments recommends this compact portable data communication tester, a multi-purpose tester designed for the maintenance and trouble-shooting of digital networks. It performs both framed and unframed tests on various equipment such as primary multiplexers, digital cross connects, automatic protection switches and circuits at a speed of between 50bit/s and 2048kbit/s.

This optimized data communication tester, model A0300002, integrates V.24, V.35, V.11, X.21 interfaces, G.703 Co-dir 64kbit/s interface and G.703-2Mkbit/s interface; accommodations for future interfaces have also been considered. It supports synchronous or asynchronous data transmission via each interface. The rugged tester can be used for offline testing of primary multiplexers on G.703-2M unframed interface or online testing on G703-2M framed interface. It generates and monitors PCM30, PCM30 CRC, PCM31 and PCM31 CRC frame structures and provides an error analysis function which allows histograms of error or alarm data to be displayed. The measurement results can be stored in its onboard memory to prevent data loss in the event of power failure.

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Toronto, Canada – GAO Instruments recommends this compact handheld power meter , intended for absolute power and relative loss measurements of fiber optics. The economical power meter is especially useful in telecommunications and CATV maintenance and fiber optics test labs. It features highly accurate test results, automatic identification of frequencies, and efficient data storage. This easy-to-use power meter is resistant to dust and water, which makes it suitable for field use. The optical power measurement range is from -70dBm to 6dBm; the identification frequency range is from 10Hz to 60kHz.

GAO Instruments’ multi-functional handheld power meter, model A0670008, tests optical power within a wavelength range of 800nm to 1650nm and displays test results in mW, dB and dBm on its large, high resolution LCD screen. It also offers pre-calibrated wavelengths including 850, 980, 1300, 1310, 1490, and 1550nm and more optional calibrated wavelengths are available. The portable power meter consumes little power due to its auto-off function and a quick response time without requiring warm-up. It has a FC universal 2.5mm adaptor and offers FC, SC and ST interchangeable connectors for selection.  In addition, it provides an RS232 communication port for data transmission.

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Toronto, Canada – GAO Instruments recommends this compact stable optical light source ,with dual wavelengths been optimized for high performance. This handheld optical light source is ideally suited for the installation, construction and maintenance of fiber optic projects, telecommunication maintenance and CATV systems. The light source offers a highly stable output power and adjustable frequency.

The portable optical light source, model A0630005, performs tests at 1310nm and 1550nm dual-wavelength outputs for single-mode fiber or 850nm to 1300nm dual-wavelength outputs for multi-mode fiber. It offers modulation frequencies including CW, 2Hz, 270Hz, 1KHz, and 2KHz. Equipped with a user-friendly interface, it provides a clear display of test results. The optical light source ships with a rechargeable battery and is powered via a 2.5mm FC/Universal adaptor. This easy-to-use light source is a perfect choice for field use as it has a compact design, friendly interface and outstanding performance.

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Toronto, Canada – GAO Instruments recommends this compact handheld optical multi-meter, that is widely used in applications such as telecommunication and CATV maintenance, synthetic cable distribution systems, passive devices manufacturing, and in lab testing and research work. The portable multimeter incorporates functions of both an optical power meter module and an optical light source module into a single unit. Switching between the two modules is achieved easily via simple menu selection. This multimeter implements loop-around tests by using both modules.

This advanced multi-meter, model A0670009, features highly precise and speedy measurements, which makes it one of the most popular instruments for general and integrated applications. This optical meter is equipped with a stabilized light source using a dual-wavelength laser diode and one port output. In addition, different light source and power meter options can be configured within the multi-function meter to meet a customer’s specific requirements. The smart meter has an auto-off function and shuts down automatically after ten minutes of inactivity for energy saving. Its durable design allows it to deliver stable performance even in harsh environments.

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Toronto, Canada – GAO Instruments recommends this compact portable 10/100/1000m Ethernet analyzer, featuring multi-network testing and comprehensive network monitoring functions. It is ideal for analyzing and troubleshooting Ethernet networks during the processes of construction or maintenance. The analyzer is able to test data rates and performance metrics including throughput, latency, frame loss and back-to-back frames.

The 10/100/1000M Ethernet analyzer, model A0300004, includes an electrical interface and an optical interface operating in either single or multi-mode. This advanced analyzer generates constant, burst or ramped traffic and simulates up to 500 stations. It has two working modes: in dual-port mode, most of tests can be completed with the single analyzer; in remote testing mode, long distance tests can be carried out with two Ethernet analyzers placed at the two ends of a WAN. The Ethernet analyzer has a USB port to conveniently upload stored data and through which embedded firmware can be upgraded. Equipped with a TFT LCD screen, the analyzer displays text and graphics in up to 16 bits color.

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Toronto, Canada – GAO Instruments recommends this compact optical fiber identifier, This optical fiber identifier conveniently tests and detects optical signals, modulated signals and the presence or absence of signals. It is well-suited for the installation and maintenance, rerouting or restoration of telecommunications and CATV systems, test labs and other fiber optic projects.

The portable identifier, model A0640003, efficiently identifies the traffic direction and frequency tone without any damage to the fibers. It works at wavelengths from 900nm to 1650nm and offers an optical power reading range of -30dBm to 5dBm. This identifier’s power display function is used to detect the relative core power of optic fiber. Since opening the fiber at a splice point for identification is not required, service interruptions are avoided. The identifier features low bending loss, highly efficient output, and core power display of optic fibers. It also provides Ø0.25, Ø0.9, Ø2.0 and Ø3.0 replaceable adaptors to satisfy various optical cables.

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Toronto, Canada – GAO Instruments recommends this compact E1 service tester, a multi-functional test device for digital transmission systems. It is intended for installation testing, engineering check and acceptance and daily maintenance of E1 PCM lines (G.703 2Mbit/s). The handheld tester conducts channel testing, alarm analysis, fault detection and signal analysis of E1 (2Mb/s) lines. The service tester’s handheld structure and durable design make the E1 tester easy to carrying for on-the-spot measurements.

This E1 service tester, model A0300012, supports HDB3 and AMI line coding. The practical tester performs error analysis according to the G.821, G.826 and M.2100 ITU-T standards. It monitors any voice channel at the receiving terminal and measures signal voltage and frequency at the same time. The compact service tester displays the status of the transmission circuit and identifies cable faults effectively. It uses the Test Manager Software for test result analysis, archiving and printout via the serial port. The multi-functional tester supports continuous test performance up to 99 days using five AA NiMH batteries.

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