Comtech EF Data SNM-1001 - Manual (Page 56)

SNM-1001 Network Control Modem Maintenance
Rev. 1 5–11
5.2.2 Demodulator Faults
5.2.2.1 Burst Mode
Fault/Alarm Possible Problem and Action
IF SYNTHESIZER Demodulator IF synthesizer fault.
Indicates the demodulator IF synthesizer is faulted. This fault is a hardware
failure. Return the modem for repair.
MODULE Demodulator module fault.
Typically indicates the demodulator will not program. This could indicate a
problem in the M&C or in the interface between the demodulator and M&C.
Return the modem for repair.
5.2.3 Transmit Interface Faults
Fault/Alarm Possible Problem and Action
TX CLOCK ACT Activity detector alarm of selected interface transmit clock.
Indicates the selected TX clock is not detected. Verify the signal at the
selected TX clock source. The interface will fall back to the internal clock
when this alarm is active.
5.2.4 Receive Interface Faults
5.2.4.1 Burst Mode
This fault is not applicable when the modem is in the Burst mode.