Qlink-3000 Multiplexing modem
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Copyright © 2003 -2005 Cronyx Engineering
37
The BER tester may be enabled towards the SHDSL link only:
•
Link test – over full payload;
•
Port 0 tributary test – over port 0 tributary;
•
Port 1 tributary test – over port 1 tributary;
In order to view test results, select the “Test results...” item:
Port 0 Tributary Bit Error Test
Bit error rate: 0.0
Total errors: 87
Elapsed seconds: 75 (00:01:15)
Seconds with no sync: 4 (00:00:04)
Seconds with errors: 18 (00:00:18)
1. Error insertion rate: no errors inserted
2. Insert single error
3. Test pattern: pseudorandom
<C> - clear errors counter, <R> - refresh mode, <Enter> - exit
The information on the screen is updated once per two seconds. To return to the upper-
level menu, you must press <Enter> (or <Return>). Press “R” to turn the imposition
mode on/off. In the imposition mode the screen will not be cleared when information is
updated. To reset BER-tester counters, press “C”.
Command “1” selects the error insertion rate, 10
-7
to 10
-1
errors/bit. Command “2” inserts
a single error. Command “3” switches the test data pattern to fixed 8-bit code.
Test results information is displayed in the following lines:
• Bit error rate – error rate in the received data. If not test pattern was detected during
reception, then the “Test pattern not detected” string is displayed instead of the error
rate;
• Total errors – data error counter;
• Elapsed seconds – total testing time;
• Seconds with no sync – the number of seconds, during which test pattern
synchronization was absent;
• Seconds with errors – the number of seconds, during which errors were detected.
BER tester modes are not saved in the non-volatile memory.
