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Constellation™
November 2003
10-14 Troubleshooting
Guidelines
TX TO MODEM (A1, A2 /
B1, B2)
Modem (A1, A2 / B1, B2) is not
receiving CLK from HLM.
Replace HLM. See
WS LOOPBACK
Wayside signal in loopback mode
locally.
Clear loopback test. Keypad
command: CONTROL >
WAYSIDE LPBK > WAYSIDE
LPBK > CLR
WS LPBK BY REMOTE
Wayside signals are looped back
toward the HLM.
Clear loopback by remote from
remote radio.
WS OUTPUT FAIL
No output signal or signal level too
low.
Check the termination. If it is
okay, replace the High Level
Mux.
WS REMOTE LPBK
Wayside signal loopback test from
the far end.
Clear remote loopback from
local radio. Keypad command:
CONTROL > WAYSIDE LPBK >
WAYSIDE RMT LPBK > CLR
WS RX LOF
Loss of frame of outgoing signal
from the High Level Mux.
Check the Modem alarms. If
okay, check far-end High Level
Mux.
Message
Explanation
Course of Action/Possible
Causes
Summary of Contents for Constellation
Page 1: ...Point to Point Digital Radio Constellation Installation Maintenance...
Page 2: ......
Page 4: ...Constellation November 2003...
Page 18: ...Constellation November 2003 xii List of Figures...
Page 24: ...Constellation November 2003 xviii Preface...
Page 26: ...Constellation November 2003 xx Preface...
Page 96: ...Constellation November 2003 4 12 Loopback Testing...
Page 110: ...Constellation November 2003 5 14 Configuring the Constellation Radio...
Page 134: ...Constellation November 2003 7 14 SNMP Based Network Management...
Page 210: ...Constellation November 2003 11 36 Field Replaceable Units...
Page 238: ...Constellation November 2003 A 16 Wiring Specifications...
Page 260: ...Constellation November 2003 C 10 Hardware Compatibility Tables...
Page 276: ...Constellation November 2003 Glossary 6...
Page 291: ......