Function Select: Faults/Alarms: Modulator; Function Select: Faults/Alarms: Demodulator - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Front Panel Operation
Unlike faults, alarms do not cause switching to occur. To display labels for individual faults or
alarms, press <ENTER>.
Press [←] or [→] to move the flashing cursor to make the selection. The label for that Fault/Alarm
is then displayed on line 1 of the display. Press [CLEAR] to exit this level of operation and return
to the previous level.

FUNCTION SELECT: FAULTS/ALARMS: MODULATOR

IF SYNTHESIZER
DATA CLOCK SYN
I CHANNEL
Q CHANNEL
AGC LEVEL
MODEM REF ACT
MODEM REF PLL
MODULE
CONFIGURATION

FUNCTION SELECT: FAULTS/ALARMS: DEMODULATOR

CARRIER DETECT
IF SYNTHESIZER
I CHANNEL
Q CHANNEL
BER THRESHOLD
MODULE
CONFIGURATION
LNB CURRENT
MODULATOR
---------
Modulator IF synthesizer fault.
Transmit clock synthesizer fault. Indicates the internal Voltage Controlled
Oscillator (VCO) has not locked to the incoming data clock.
I channel data activity fault.
Q channel data activity fault.
TX IF AGC level fault.
MODEM REF activity alarm.
MODEM REF PLL not locked.
Modulator module fault.
Modulator configuration fault.
DEMODULATOR
-------
Carrier detect fault. Indicates the decoder is not locked.
Demodulator IF synthesizer fault. Indicates the IF synthesizer is not locked.
I channel activity fault. Indicates a loss of activity in the I channel of the
quadrature demodulator.
Q channel activity fault. Indicates a loss of activity in the Q channel of the
quadrature demodulator.
Secondary alarm result of the BER threshold set in the DEMOD
Configuration menu.
Demodulator/decoder module fault.
Demodulator/decoder configuration fault.
LNB Current fault.
4–46
Revision 1
MN/SNM1001L.IOM