Comtech EF Data SDM-300A - Manual (Page 155)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–61
FUNCTION SELECT: FAULTS/ALARMS: MODULATOR
MODULATOR
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IF SYNTHESIZER Modulator IF synthesizer fault.
DATA CLOCK SYN Transmit clock synthesizer fault. Indicates the internal Voltage Controlled
Oscillator (VCO) has not locked to the incoming data clock.
I CHANNEL I channel data activity fault.
Q CHANNEL Q channel data activity fault.
AGC LEVEL TX IF AGC level fault.
MODEM REF ACT MODEM REF activity alarm.
MODEM REF PLL MODEM REF PLL not locked.
MODULE Modulator module fault.
CONFIGURATION Modulator configuration fault.
FUNCTION SELECT: FAULTS/ALARMS: DEMODULATOR
DEMODULATOR
+------
CARRIER DETECT Carrier detect fault. Indicates the decoder is not locked.
IF SYNTHESIZER Demodulator IF synthesizer fault. Indicates the IF synthesizer is not locked.
I CHANNEL I channel activity fault. Indicates a loss of activity in the I channel of the
quadrature demodulator.
Q CHANNEL Q channel activity fault. Indicates a loss of activity in the Q channel of the
quadrature demodulator.
BER THRESHOLD Secondary alarm result of the BER threshold set in the DEMOD
Configuration menu.
MODULE Demodulator/decoder module fault.
CONFIGURATION Demodulator/decoder configuration fault.