Constellation™ 2002 June 20
11-10
M12 FILLER MISSING Filler Unit is missing from unused
M12 slot.
Install a Filler Unit in the
missing slot.
M12 STBY ABSENT M12 Unit is unplugged from the M12
Standby slot.
M12 Unit is not equipped per
configuration.
Defective M12 card.
Is the M12 Unit plugged in?
Install an M12 Unit.
Replace the M12 Unit. See
Chapter 12.
M12-STBY RX CLK HLM is not receiving CLK from
M12-Standby Unit.
Replace the M12 Unit in the M12
Standby slot.
M12-STBY TX CLK M12 Standby Unit is not receiving
TX CLK from HLM.
Replace the High Level Mux with
the red (Fault) LED lighted.
M13 SYNC LOSS Loss of frame for selected DS3 to be
demuxed.
Check far-end High Level Mux
and configuration.
MANUAL MUTE TX power switch on the Transmitter
Assembly is OFF.
On the Transmitter Assembly
faceplate, press the Tx switch to
the ON position.
MODEM ABSENT (A1, A2 /
B1, B2)
Modem card unplugged.
Modem not installed per
configuration.
Defective Modem.
Is the Modem plugged in?
Install Modem.
Replace the Modem. See
Chapter 12.
MODEM A, B IF LPBK Modem A or B in loopback mode
(local command only).
Cancel the IF loopback test.
NO ETHERNET ADDRESS Address not assigned; unique
address provided by Harris.
Return SPU Controller to Harris.
NO IF INPUT Loss of signal from the Modem to
the Transmitter.
Check the cable connecting the
Modem to the Transmitter. If
the cable is okay, replace the
Modem.
OC3 INPUT LOS No signal present at transceiver of
HLM-155.
Check the input signal from the
external equipment.
OC3 LPBK The OC3 signal is in loopback mode
locally.
Clear the loopback test from the
local radio.
CONTROL > hidden menu
OC3 LPBK BY REMOTE The OC3 signal is looped back on
HLM towards the Modem.
Clear loopback by remote test
from the remote radio.
OC3 REMOTE LPBK OC3 signal loopback test from the
far end.
Clear remote loopback test from
the local radio.
CONTROL > hidden menu
OC3 RX LOF Loss of frame into HLM-155 from Hi
Cap Modem.
Check Modem alarms.
OC3 TX LOF Loss of frame into HLM-155 from
customer.
Check input signal from external
equipment.
Message Explanation
Course of Action/Possible
Causes
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