Comtech EF Data DD2401 - Manual (Page 60)

User Interfaces DD2401 Satellite Demodulator
4- 36 MN-DD2401 - Rev. G
<1> Convolutional
Decoder 0 = None, 1 = Viterbi 1/2 Rate, 3 = Viterbi 3/4 Rate, 5 = Viterbi 7/8
Rate, 7 = Sequential 1/2 Rate, 9 = Sequential 3/4 Rate, 11 =
Sequential 7/8 Rate, 14 = Trellis 2/3, 20 = TPC 0.793 2D, 21 = TPC
0.495 3D, 23 = TPC ½, 24 = TPC ¾, 25 = TPC 7/8, 26 = TPC 21/44
Opcode: <2A09h>
Command a Demodulator’s Differential Decoder
<1> Differential
Decoder 0 = Off, 1 = On
Opcode: <2A0Ah>
Command a Demodulator’s Reed-Solomon
<1>
<1>
<1>
<1>
<1>
Reed-Solomon
Reed-Solomon N
Reed-Solomon K
Reed-Solomon T
RS Interleaver
Depth
0 = Disable, 1 = Enable
Unsigned Binary
Unsigned Binary
Note: Always set to Zero; as the T value is calculated from N and
K.
Unsigned Binary, 4 or 8
Opcode: <2A0Dh>
Command a Demodulator’s Descrambler Control
<1> Descrambler
Control 0 = Disable, 1 = Enable
Opcode: <2A0Eh>
Command a Demodulator’s Descrambler Type
<1> Descrambler Type 0 = None, 1 = IBS Scrambler, 2 = V35_IESS, 3 = V35_CCITT, 4 =
V35_EFDATA, 6 = OM73, 7 = Reed-Solomon Scrambler, 8 =
V35_EFRS, 9 = TPC Scrambler
Opcode: <2A0Fh>
Command a Demodulator’s Spectrum
<1> Spectrum 0 = Normal, 1 = Inverted
Opcode: <2A11h>
Command a Demodulator’s Buffer Clock
<1> Buffer Clock 0 = External, 1 = Internal, 2 = EXC, 3 = RX SAT
Opcode: <2A12h>
Command a Demodulator’s Buffer Clock Polarity
<1> Buffer Clock
Polarity 0 = Normal, 1 = Inverted
Opcode: <2A17h>
Command a Demodulator’s Operating Mode
<1> Operating Mode 0 = Stop, 1 = 2047 Test
Opcode: <2A1Ah>
Command a Demodulator’s BER Exponent
<1> BER Measure Number of Bits in Measurement Period in Powers of Ten (ex: 6 = 10
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