Comtech EF Data DD2401 - Manual (Page 54)

User Interfaces DD2401 Satellite Demodulator
4- 30 MN-DD2401 - Rev. G
*<1>
Insert Alarms
Bit 5 = IBS Service Alarm
Bit 6 = Turbo Codec Lock Fault
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: <240Dh>
Query a Demodulator’s Eb/No, BER, Level, and AGC Voltage
Query response
<2>
<2>
<2>
<1>
<1>
<1>
<1>
<1>
<1>
Raw BER
Mantissa
Corrected BER
Mantissa
EbNo
Raw BER
Exponent
Corrected BER
Exponent
BER/EbNo Status
Input Level
Input Level State
AGC Voltage
Bytes 1 - 2 = Unsigned Binary Value Raw BER
Bytes 1 - 2 = Unsigned Binary Value Corrected BER
Unsigned Binary Value, 2 Decimal Places Implied
Byte 3 = Unsigned Binary Value Exponent
Byte 3 = Unsigned Binary Value Exponent
Bit 0 = Raw BER and Corrected BER Status (1 = Valid)
Bit 1 = Test 2047 BER Status (1 = Valid)
Bits 2 - 3 = EbNo Status (0 = EbNo is Invalid, 1 = EbNo is Valid, 2 =
EbNo is Smaller Than Indicated Value, 3 = EbNo is
Greater Than Indicated Value)
Bit 4 = Raw BER Counter Overflow (1 = overflow condition)
Bit 5 = Test 2047 BER Counter Overflow (1 = overflow condition)
Bits 6 & 7 = Spares
Binary Value in -1 dB Steps, Negative Sign Implied
Signed Binary (0 = Equal to, 1 = Greater Than, -1 = Less Than Value
in -1 dB Steps, Negative Sign Implied)
In Hex, decimal point implied.
Opcode: <2437h>
Query a Demodulator’s Lock Status
Query response
<1> Lock Status Bit 0 = Demod Chipset Lock (0 = Unlocked, 1 = Locked)
Bit 1 = Viterbi Lock (0 = Unlocked, 1 = Locked)
Bit 2 = Reed-Solomon Lock (0 = Unlocked, 1 = Locked)
Bit 3 = Sequential Lock (0 = Unlocked, 1 = Locked)
Bits 4 – 7 = Spares