Model Number	GAO2120
Brand Name	GAO

Description - GAO2120 E1 Service Tester

This E1 service tester is a multi-functional digital transmission system test device, designed for the installation test, engineering check and acceptance, daily maintenance of the E1 PCM line (G.703 2Mbit/s), mainly performing channel test, alarm analysis, fault finding and signaling analysis of the E1 (2Mb/s) line. This instrument mainly has following functions:

Basic Functions - GAO2120 E1 Service Tester

· Support interface test of unbalanced 75Ω and balanced 120Ω.
· Support HDB3 and AMI line coding.
· Framed test under TX/RX mode ( Out-of-service test ).
- Framed/unframed end-to-end 2Mb/s BER testing.
- N×64Kb/s BER testing.
- Can monitor signal loss , AIS, frame loss, remote alarm, remote multiframe alarm, CRC multiframe loss, CAS multiframe loss, pattern loss alarm and bit, CODE, FAS, E-BIT error and so on.
- Clock slip measurement.
· Online BER monitoring and timeslot analysis under RX HI-Z (high impedance) and through (bridge) mode.
- Performance test of bit error, coding error, FAS error, CRC4 error and E bit error.
- FAS and MFAS word analysis, timeslot busy or idle status display.
- Timeslot content monitoring, monitoring and display of 8-bit digital code word in any selected timeslot.
- Any 64kb/s tone channel monitoring.
- CAS (channel associated signaling) ABCD code monitoring and CCS (common channel signaling) TS16 timeslot monitoring.
· Framed/unframed Round Trip Delay measurement.
· 2M or 64kb/s signal of SDH transmission network automatic protection switching (APS) delay measurement.
· PCM simulation mode:
- Simulate PCM terminal to perform various error insertion and alarm insertion.
- Transmit editable Si, Sa, A, FAS, CRC-4, MFAS, NMFAS and E- bit.
- Insert idle codes into one or more timeslots, and the idle code pattern is programmable.
- Insert single audio signals whose signal frequency and voltage are adjustable in one or more timeslots.
- Monitor any voice channel in the receiving terminal, single audio channel can measure signal voltage and frequency at the same time.
- CAS (channel associated signaling) ABCD code programming, CCS (common channel signaling) TS16 content programmable;
· 2M signal level, frequency, offset measurement.
· Transmission clock maximum deviation ±999ppm, effectively assess the clock restoration capability of the tested circuit.
· Transmission clock: internal, interface, external 2M clock/signal (optional).
· Test code type pattern: pseudorandom binary sequence (PRBS), fixed code and 16BIT user programmable code.
· Bit, rate and other types of error insertion modes.
· Real time display open circuit and short circuit status of the transmission circuit, effectively identify cable fault.
· Has automatic test function at fixed time.
· Perform the error analysis according to the G.821, G.826 and M.2100 standard of ITU-T.
· Use the TestManager software for measurement result analysis, clean up, archiving and print output on PC via the serial port;

Main Features - GAO2120 E1 Service Tester

· Handheld structure, durable design, suitable for carrying around and on-spot measurements.
· High resolution backlight LCD, smart navigation mode operation displays in English.
· Combine BERT, time-slot analysis, signalling testing, signal analysis, and other functions together.
· Synchronization performance measurements give references to the more and more important system synchronization problem.
· Up to 99 days continuance test performance.
· High storage capacity, can store 4 groups of test results including settings and results information.
· Built-in NiMH rechargeable batteries and embedded with smart fast charger circuit. Can be charged with automobile cigarette lighter battery adapter.
· Real-time clock and storage could be kept during a long time by power supply of the second spare battery without AC adapter and built-in NiMH battery module.
· By using TestManager software, upgrading the embedded software of the instruments via the serial port to perfect the functionalities of the instrument and protect your investment.

Configuration List - GAO2120 E1 Service Tester

Specifications - GAO2120 E1 Service Tester

For any sales inquires please contact:

1-877 585-9555, ext 601 - Toll Free (USA & Canada)
1-416 292-0038, ext 601 - All Other Areas