Comtech EF Data DMD20 - Manual (Page 85)

DMD20/DMD50/DMD2050/DMD2050E/DMD1050/OM20 Remote Protocol Remote Operations
MN-DMDREMOTEOP Revision 9 1–75
Opcode: <2403h> Query a Modem's Identification
Query Response (1 Byte)
<1> Modem ID DMD20 Modulator = 20, DMD20 Demodulator = 21,
DMD20 Modem = 22
Opcode: <2404h>
Query a Modem's Control Mode
Query Response (1 Byte)
<1> Modem control mode 0 = Front Panel, 1 = Terminal, 2 = Computer
Note: DMD20 will always return 2 = Computer
Opcode: <2407h>
Query a Modem's Latched Alarms
Query Response (11 Bytes)
<1> Mod Latched Alarm 1 Bit 0 = Transmit FPGA/Processor Fault
Bit 1 = Drop DSP
Bit 2 = Transmit Symbol Clock PLL Lock
Bit 3 = Reserved
Bit 4 = Transmit L-Band Synthesizer Lock
Bits 5 – 7 = Reserved
0 = Not Latched, 1 = Latched
<1> Demod Latched
Alarm 1
Bit 0 = Receive FPGA/Processor Fault
Bit 1 = Carrier Loss
Bit 2 = Multiframe Sync Loss
Bit 3 = Frame Sync Loss
Bit 4 = IBS BER Alarm
Bit 5 = Satellite AIS
Bit 6 = Rx Data Activity
Bit 7 = Rx AGC Level
0 = Not Latched, 1 = Latched
<1> Demod Latched
Alarm 2
Bit 0 = Buffer Underflow
Bit 1 = Buffer Overflow
Bit 2 = Buffer Under 10%
Bit 3 = Buffer Over 90%
Bit 4 = RS Decoder Lock Fault
Bit 5 = RS De-Interleaver Fault
Bit 6 = RS Decoder Uncorrectable Word
Bit 7 = Reserved
0 = Not Latched, 1 = Latched
<1> Demod Latched
Alarm 3
Bit 0 = Rx L-Band Synthesizer Lock
Bit 1 = Insert DSP Config
Bit 2 = Buffer Clock PLL Lock Detect
Bit 3 = Viterbi Decoder Lock
Bit 4 = Sequential Decoder Lock
Bit 5 = Rx Test Pattern Lock
Bit 6 = External Reference PLL Lock
Bit 7 = Rx Carrier Level
0 = Not Latched, 1 = Latched