Comtech EF Data Vipersat SLM-5650A, Installation And Operation Manual

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SLM-5650A Satellite Modem
Revision 10
Appendix A A–10 MN-SLM-5650A
A.4 System Faults/Alarms
System faults are reported in MONITOR: Alarms from the front panel menu, and stored faults are
reported in the MONITOR: Event-Log menu. To determine the appropriate action for repairing
the modem, refer to Table A-2 and the list of possible problems.
Table A-2. SLM-5650A Fault Tree
FAULT TYPE
TX IF
OUTPUT
OFF
TX
STATUS
LED
TX FAULT
RELAY (1)
RX
STATUS
LED
RX FAULT
RELAY (2)
UNIT
STATUS
LED
UNIT
FAULT
RELAY (3)
AUDIBLE
ALARM
TX AIS RX AIS
MODULATOR
FAULTS
None Green
MOD Symbol
Clock PLL
X Red X X X
MOD RF
Synthesizer PLL
X Red X X X
MOD I/Q Activity X Red X X X
MOD Filter
Clipping
X Red X X X
TX Interface Clock
PLL
Red X X X
TX INTF Clock
Activity
Amber X X
TX Interface SCT
PLL
Red X X X
TX Interface Data
As Is
Amber X
DEMODULATOR
FAULTS
None Green
DEMOD Carrier
Lock
Red X X X
DEMOD Decoder
Lock
Red X X X
DEMOD
Synthesizer PLL
Red X X X
DEMOD I/Q
Activity
Red X X X
DEMUX Lock Red X X X
Buffer Red X X X
Buffer Fill Amber X
Buffer Overflow Amber X
Buffer Underflow Amber X
Buffer PLL Red X X X
Buffer CLK REF
Activity
Amber X
RX Interface Data
As Is
Amber X