Comtech EF Data C5 - Manual (Page 161)

C5/K1/K3 Integrated Satellite Terminal System Operation
Rev. 0 4–35
4.1.3.8.1 Modulator Faults
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.
MODEM REF PLL MODEM REF PLL not locked.
MODULE Modulator module fault. Typically indicates that the modulator
module is missing or will not program.
4.1.3.8.2 Demodulator Faults
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. Typically indicates that the
demod/decoder module is missing or will not program.
4.1.3.8.3 Transmit Interface Faults
TX DATA/AIS Data or AIS. When data fault is selected in the Interface
Configuration menu, the fault indicates a data stable condition. This
indicates the data is all 1s or 0s (i.e., data is not transitioning). When
AIS is selected, the alarm indicates the data is all 1s from customer
data input to the modem. When None is selected in the Interface
Configuration menu, the TX Data/AIS Fault/Alarm is not activated.
Note: AIS is an alarm, not a switching fault.
TX CLK PLL Transmitter phase-locked loop fault. Indicates the transmitter
Phase-Locked Loop (PLL) is not locked.
TX CLK ACTIVITY Activity detector alarm of the selected interface transmit clock. The
interface will fall back to the internal clock when this alarm is active.
CONFIGURATION TX interface configuration fault.
Indicates the TX interface cannot execute a programmed
configuration parameter.