Shandong Senter Electronic Co., Ltd.
Main products:ADSL2+Tester,OTDR,IPTV Tester,VDSL2 Tester,E1 Tester,PON Power Meter,Optical Power Meter,Laser Source,VFL,Optical Fiber Identifier,Cable Fault Locator,Telephone Line Tester
Contact Us
  • Contact Person : Ms. Liu Anthea
  • Company Name : Shandong Senter Electronic Co., Ltd.
  • Tel : 86-533-3589257
  • Fax : 86-533-3587522
  • Address : Shandong,Zibo,No.98,Wanjie Road, New&Hi-Tech Area, Zibo, Shandong, China
  • Country/Region : China
  • Zip : 255086

ST350A/ST350C 2M Transmission Analyzer

ST350A/ST350C 2M Transmission Analyzer
Product Detailed
Digital Transmission Analyzer integrates many advantages of several kinds of imported 2M meters.

ST350 2M Digital Transmission Analyzer (E1 Tester)


ST350 meter is PCM2M integrated test handset, mainly used to measure the code error rate of communication line data and analyze the line fault as well as the causes. It can realize the measurement of 2M series N*64K channel transmission parameters and the daily maintenance test.

Powerful functions are your great assistant. Volume adjustable, loudspeaker can be used. English/Chinese interface makes your work much simpler and easier. Multi-tasks work facilitates your test.



Main Functions1. Out-of-Service measurement 2. In-Service measurement 3. Framing and unframed signal transmit and receiving 4. 2Mbit/s unframed measurement 5. 2Mbit/s framing n*64 Kbit/s measurement 6. Measurement for frame error (FAS ERR), BIT ERR, CRC-4 Error, Code Error (COD ERR), E-bit Error (E-ERR) 7. Clock slip measurement 8. Measurement for signal loss (SIG LOSS), AIS, frames loss (FAS LOSS), pattern loss (PATT LOSS), remote alarm (RA), multi-frame remote alarm (MRA) 9. Line signal frequency measurement 10. Level and frequency measurement of voice channel 11. SMF set and display 12. ABCD set and display 13. Through measurement 14. RT delay measurement 15. Timeslot monitor 16. Three Tx Clock Options (Internal, external, and recover from the received signal) 17. Three Inputs Mode: Terminal, Bridge, Monitor 18. G. 821, G. 826, M. 2100 performance 19. Graphs results of alarm and error20. RS232 printing 21. Built-in memory prevents data loss when power off 22. Connect to PC 23. 7 setup storages and 436 results storages 24. Bi-directional Listen, dual E1 Measurement 25. Tx Clock offset function 26. Online software update 28. Measurement for co-directional 64k, V. 35 Synchronization29. Pattern Slip (PAT SLIP) measurement 30. APS (Auto Protect System) Time Measurement31. Dual-frequency departure measurement


Technical Specifications  



Output interface 

75 Ohm balanced, 120 Ohm balanced, conforming to G.703 requirements

Signal structure


Frame (PCM30, PCM31, PCM30CRC, PCM31CRC), conforming to G.704 n×64 Kbit/s structure

Line code 


Signal rate

2048 kbit/s

Internal clock accuracy



Internal, external and distill

Output intrinsic twittering


Test pattern

False random sequence 2E6-1,2E9-1,2E11-1,2E15-1, 2E20-1, 2E23-1, conforming

Free TS pattern:

8bit man mode

Code error insertion

FAS ERR: once, continuous twice, continuous 3 times, continuous 4 Times

BIT ERR: single 1E-2~1E-7

Pattern slip

PAT slip


Signal input impedance

terminal: 75 Ohm unbalanced, 120 Ohm balanced, Tx loss conforms to G.703

bridge: > 750 Ohm unbalanced, > 1200 Ohm balanced

monitor: 20 dB for input sensibility

Signal input equalizing feature

0—9 dB

Signal input twittering capacity

conforms to G.823

Input anti-interference

conforms to G.703

Signal structure


Frame (PCM30, PCM31, PCM30CRC, PCM31CRC), frame signal conforms to G.704 n×64 kbit/s structure

Line code


Signal rate

2048 kbit ±50ppm

Test pattern

False random sequence 2E6-1,2E9-1,2E11-1,2E15-1, 2E20-1, 2E23-1 conforming to ITU-T0.151, man code 8 bit

Frequency test

For line signal and voice channel signal

Level test

For line signal and voice channel signal

Bit error monitoring

FAS ERR, BIT ERR, CRC-4 code error performance test, CODE ERR

Alarm monitoring


Slip monitoring


Time delay test

Test time delay performance

Bit error analysis

G.821, G.826, M2100

External clock input impedance

Terminal: 75 Ohm unbalanced, 120 Ohm balanced, Tx loss conforming to G.703

Bridge: > 750 Ohm unbalanced, > 1200 Ohm balanced

External clock input signal

HDB3/AMI conforming to G.703, pulse signal,> 2.5Vp-p

Other Specifications

Battery Duration:

5hs (except Modem status)


200mm×160mm×42mm/0.9kg(With battery)

ST350A/ST350C 2M Transmission Analyzer

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