ComStream CM601, Инструкция по установке и эксплуатации

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B-6 Internal BERT
View Measurement and Error Detection Results
To view the results of the BERT measurement and error detection functions issue
the
BDP
command.
Modem Verification
Using the BERT
One commonly used BERT test checks the complete data paths of the modem
with the exception of the user interface, which can be checked using a near data
loopback test.
Each time the BERT is enabled, your transmit data is replaced with data from the
BERT transmit pattern generator.
Performing a BERT BER Test
To perform a BERT BER test, follow these steps:
1. Issue the following three BERT configuration commands with the given
parameters:
2. Enable the BERT by issuing a remote
BEN 1
command or the front panel
BERT Test Mode ENABLE
command.
The Test Mode LED illuminates. If the modem is receiving data from another
modem and from a BERT with the same pattern, the BERT will synchronize
and the monitor information will be valid.
Review the modem status information by either issuing a remote
BDP
command or accessing and reviewing the BMonitor command list from
the font panel.
If all systems are working properly, the BDP command will report the data
shown in Table B-2.
Remote Commands Front Panel Commands
1.
BPT 0
1.
BERT Pattern 2^9-1
2.
BST 0
2.
BERT SyncLvl 1000/10^4
3.
BBL 1
3.
BERT Blk Length 1SEC
Table B-2 BERT Monitor Command Status Data
Status Parameters Command Function
BSS 0
BERT sync status
BSF 0
BERT sync history
BEC 0
BERT bit error count
BER 0 X 10^-x
BERT average BER
BBE 0 X 10^-x
BERT block BER
BWE 0
BERT block error count
BLE 0 X 10^-x
BERT average block error rate
BDI 0
BERT receive data inverted