Cronyx E1 - L/S, Руководство по установке и эксплуатации

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Modem-Converter E1-L/S
© 2006 Cronyx
The loopback modes are not saved in the non-volatile memory.
4.6. «Test» Menu
«Test» menu is used to control the operation of BER tester:
Link Bit Error Test
Time total: 00:00:23
Sync loss: 00:00:01
Bit errors: 0
Error rate: 0.0
1. Testing: Enabled
3. Error insertion rate: No errors inserted
4. Insert single error
5. Test pattern: 2E15-1 (O.151)
<C> - clear errors counter, <R> - refresh mode, <Enter> - exit
To clear the statistics counters, press «C». To toggle refresh style between overlapping
and redraw, press «R» (the information on the screen is refreshed every two seconds; in
the overlapping mode, the screen will not be cleared before displaying new information).
To return to the upper level menu, press <Enter> (or <Return>).
The
«Testing»
command enables or disables the test data sequence generation.
The
«Error insertion rate»
command selects the error insertion rate, from 10
-7
up to
10
-1
errors per bit, or disables error insertion (when disabled the «No errors inserted»
message will be printed in place of the error insertion rate value).
The «Insert single error» command inserts a single error.
The
«Test pattern»
command allows to select the test pattern:
• «2E15-1 (O.151)» – pseudo-random test pattern based on polinom of the length of
2
15
-1=32767 bit (in accordance to the ITU-T Recommendation O.151).
• «2E3-1» – polinom of the length of 2
3
-1=7 bits (i.e., constant 7 bit pattern).
• «Binary» – constant 8 bit code (in this case the additional field «Binary test code: ...»
for binary code entering will be displayed).
Test results information is displayed in the following lines:
• «Time total» – total time of testing.
• «Sync loss» – the time during which the test pattern synchronization loss has been
detected.
• «Bit errors» – data error counter.
• «Error rate» – error rate in the received data, 10
-8
up to 10
-1
, or «Test pattern not de-