E1 Service Tester
GAO5855

Description - ADSL Tester - GAO5855 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 has following functions.

Basic Functions - ADSL Tester - GAO5855 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 - ADSL Tester - GAO5855 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.
• Combined BERT, time-slot analysis, signalling testing, signal analysis.
• Synchronization performance measurements.
• 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 built-in 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, the embedded software of the instrument can be upgraded via the serial port.

Configuration List - ADSL Tester - GAO5855 E1 Service Tester

Specifications - ADSL Tester - GAO5855 E1 Service Tester