Quantum and Evolution Series Installation and Operating Handbook
7-186
Remote Software Upgrade Screen
7.4.12 EZ BERT Option
The internal PRBS BER Tester allows pseudo-random bit patterns to be injected into the
main traffic or overhead channel and the BER results to be monitored. Use of the ESC
and AUX channels allows continuous real traffic BER performance monitoring whilst the
modem carries traffic. The front panel PRBS BER tester (described in Section 7.3.5)
offers a limited set of functionality. There is an enhanced PRBS BER Tester available via
the web user interface. The enhanced BER Tester additionally:
•
Allows PRBS BER data to be generated towards the terrestrial interface allowing
the modem to be used as a stand alone PRBS BER tester in place of a Fireberd
or similar.
•
Supports an enhanced range of test patterns, namely:
•
PRBS 2^N-1 where N = 6, 7, 9, 11, 15, 19, 20 and 23.
•
All 0’s, All 1’s.
•
Numerous sparse patterns, QRSS and user defined patterns.
•
•
Adds an elapsed time indicator, error count and an average BER figure as well as
a latency figure (displayed in terms of both bits and microseconds).
The facility exists to inject errors into the generated PRBS stream and see these reflected
within the error count.