ComStream CM601, Инструкция по установке и эксплуатации

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Internal BERT B-7
Although all status parameters are important, the following status parameters
should be reviewed closely, as their response may indicate a major fault or
error:
BERT sync status (BSS) indicates the present synchronization of the
BERT, either:
•
BSS 0
= in sync
•
BSS 1
= out of sync
BERT sync fault (BSF) indicates if the BERT has either:
•
BSF 0
= OK; remained in sync since the last BERT reset
•
BSF 1
= Loss; lost sync since the last BERT reset
The BERT is always autosynchronizing and continuously attempts to
regain sync if it is lost.
BERT bit error count (BEC) indicates the total number of errors since the
BERT last regained sync or was reset.
BEC 0 = p
erfect test results
BERT average block error rate (BER) indicates the total BER since the
last BERT sync or reset.
The BERT reset and control command can be used to temporarily freeze the
display of all status parameters.
3. Identify and troubleshoot BERT monitor parameters that are indicating faults
or errors as listed in Table B-3.
4. Disable the BERT by issuing a remote
BEN 0
command or the front panel
BERT Test Mode DISABLE
The BER test is now complete and the BERT is disabled.
Table B-3 BER Test Troubleshooting
Status
Parameter
Explanation Action
BSS 1 Out of Sync Recheck the modem configuration. Ensure that
loopback cables are properly installed.
BSF 1 Sync History Loss Issue a BERT reset command. This command
resets all monitor measurements. Review the
modem configuration and ensure that any
loopback cables are properly installed.
BEC n BERT Bit errors n is a stable reading other than zero. Issue a
BERT reset command. This command resets all
monitor measurements. Review the modem
configuration and ensure that any loopback
cables are properly installed.