Comtech EF Data DD2401 User Manual

Page 63

DD2401 Satellite Demodulator

User Interfaces

MN-DD2401 - Rev. G

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*<1>

Demodulator
Alarm 4

Reserved

Common Alarm

Reserved

Drop Alarm Status

Insert Alarms

Bit 3 = Viterbi Decoder Lock Fault
Bit 4 = Sequential Decoder Lock Fault
Bit 5 = Rx 2047 Test Pattern Lock Fault
Bit 6 = External Reference PLL Lock Fault
Bit 7 = Frame Sync Fault
(0 = Pass, 1 = Fail)

Bit 0 = Buffer Clock Activity Detect Fault
Bit 1 = External BNC Activity Detect Fault
Bit 2 = Rx Satellite Clock Activity Detect Fault
Bit 3 = External Reference PLL Activity Fault
Bit 4 = High Stability Activity Detect Fault
Bit 5 = High Stability PLL Fault
Bit 6 = Eb/No Threshold Fault
Bit 7 = Spare
(0 = Pass, 1 = Fail)

Ignored

Bit 0 = -12 V Alarm
Bit 1 = +12 V Alarm
Bit 2 = +5 V Alarm
Bit 3 = Temperature Fault
Bit 4 = Interface FPGA Fault
Bit 5 = Battery Fault
Bit 6 = RAM/ROM Fault
Bit 7 = Spare
(0 = Pass, 1 = Fail)

Ignored

Bit 0 = Terrestrial Frame Lock Fault (all modes)
Bit 1 = Terrestrial Multiframe Lock Fault (PCM-30 and PCM-30C

only)

Bit 2 = Terrestrial CRC Lock Fault (PCM-30C and PCM-31C only)
Bit 3 = Terrestrial Yellow Alarm Received (T1 only)
Bit 4 = Terrestrial FAS Alarm Received (E1 only)
Bit 5 = Terrestrial MFAS Alarm Received (PCM-30 and PCM-30C

only)

Bit 6 = Loss of Terrestrial Signaling (reported by DSP)
Bit 7 = Spare
(0 = Pass, 1 = Fail)

Bit 0 = Frame Lock Fault
Bit 1 = Multiframe Lock Fault
Bit 2 = CRC Lock Fault. Valid only in T1-ESF and E1 – CRC enabled
Bit 3 = T1 Yellow Alarm Received
Bit 4 = E1 FAS Alarm Received
Bit 5 = E1 MFAS Alarm Received
Bit 6 = E1 CRC Alarm Received
Bit 7 = CRC Calculation Fault
(0 = Pass, 1 = Fail)

Opcode: <2600h>

Command a Modem’s Control Mode

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Modem Control

0 = Front Panel, 1 = Terminal, 2 = Computer