Comtech EF Data DD2401 VME - Manual (Page 50)

User Interfaces DD2401 VME L-Band Demodulator Card Installation & Operational Manual
4-26 MN-VME2401 – Rev. B
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Control Mode
Insert Alarms
Insert Back Alarm
AGC Voltage
Symbol Rate
(0 = Pass, 1 = Fail)
0 = Front Panel, 1 = Terminal, 2 = Computer RLLP
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)
Bit 0 = Backward Alarm Received from Satellite
Bits 1 – 7 = Spares
(0 = Pass, 1 = Fail)
In Hex, decimal point implied.
Binary value, 1 sps steps
Opcode: <2406h>
Query a Demodulator’s Latched Alarms
Query response
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Latched Alarm 1
Latched Alarm 2
Latched Alarm 3
Latched Alarm 4
Bit 0 = Receive Processor Fault
Bit 1 = Signal Lock Fault
Bit 2 = Receive Satellite AIS Fault
Bit 3 = Rx AGC Input Level Fault
Bit 4 = Reed-Solomon Sync Fault
Bit 5 = Reed-Solomon Excessive Errors Fault
Bit 6 = Reed-Solomon Uncorrectable Word Fault
Bit 7 = Receive Forced Alarm
(0 = Pass, 1 = Fail)
Bit 0 = Buffer Underflow
Bit 1 = Buffer Overflow
Bit 2 = Buffer Under 10%
Bit 3 = Buffer Over 90%
Bit 4 = Receive FPGA fault
Bit 5 = Rx LNB Fault, LBST Only
Bits 6 -7 = Spares
(0 = Pass, 1 = Fail)
Bit 0 = IF Synthesizer Lock Detect Fault
Bit 1 = Rx Oversample PLL Lock Detect Fault
Bit 2 = Buffer Clock PLL Lock Detect Fault
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/Multiframe 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