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Harris Corporation
Constellation™
Loopback Testing
5-11
LOOPBACK TESTING
Tributary BER Test
From the Keypad
PERFORMANCE > TRIBUTARY BER
This command causes the far end to give a loopback to the near end. The near
end inserts an on-board pseudorandom generator on the transmitter side of the
DS1 circuit. A detector on the receiver side of the DS1 circuit gives you the BER
and also tells you how long the test has been running.
shows a BER testing of a 3xDS3 system with an add-drop
configuration.
Figure 5-10: BER testing of a 3xDS3 system with add-drop
configuration
Transmitter
Assembly
HLM-
3xDS3
Hi Cap
Modem
ACU
Receiver
Assembly
BER results from
the Keypad
Transmitter
Assembly
HLM-
3xDS3
Hi Cap
Modem
ACU
Receiver
Assembly
Local Terminal
Remote Terminal
M12
Unit n
M12
Unit n
Notes:
Terminating M12 Unit is not necessarily the next
site in the system.
Only one DS1/M12 can be tested at one time.
M12 Unit n, where n = 1 ... 7.
Summary of Contents for Constellation
Page 1: ...Point to Point Digital Radio Constellation Installation Maintenance next level solutions ...
Page 2: ......
Page 3: ...Constellation Microwave Radio INSTALLATION AND MAINTENANCE MANUAL June 20 2002 IMN 112871 E07 ...
Page 16: ...Constellation 2002 June 20 TOC 12 ...
Page 20: ...Constellation 2002 June 20 2 ...
Page 76: ...Constellation 2002 June 20 4 34 ...
Page 136: ...Constellation 2002 June 20 10 12 ...
Page 150: ...Constellation 2002 June 20 11 14 ...
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