Comtech EF Data SNM-1010L - Manual (Page 251)

SNM-1010L Data/Control Modem Revision 0
Specifications
MN/SNM1010L.OM
The modulator converts transmitted baseband data into modulated 8PSK carrier at the
following parameters:
Using vector analysis of the constellation pattern, 8PSK represents a symbol with carrier
phase angles at 22.5
°, 67.5°, 112.5°, 157.5°, 202.5°, 247.5°, 292.5°, and 337.5°. The rate
encoding provides the desired input/output bit rates.
Code Rate Symbol/Bit Bit/s Hz
2/3 1.5 2
3/4 1.333
2.25
B.3.21.2 Modulation and FEC Decoding Types
Encoder Code Rate Reed-Solomon Modulation
Viterbi, K7 1/2 BPSK
Viterbi, K7 1/2 225/205 Closed BPSK
Viterbi, K7 1/2, 3/4,
7/8 QPSK/OQPSK
Viterbi, K7, TCM 2/3 8PSK
Viterbi, K7 1/2, 3/4,
7/8 225/205 Closed QPSK/OQPSK
Sequential 1/2 BPSK
Sequential 1/2 225/205 Closed BPSK
Sequential 1/2, 3/4,
7/8
QPSK/OQPSK
Sequential 1/2, 3/4,
7/8
225/205 Closed QPSK/OQPSK
Turbo Product 21/44, 5/16 BPSK
Turbo Product 3/4 QPSK/OQPSK
Turbo Product 3/4 8PSK
Uncoded 1/1 BPSK, QPSK, OQPSK
Note: Reed Solomon is a fixed 225/205, t = 10 rate, with a fixed 8 depth interlever.
B.3.21.3 Scrambling Types
The operator selects one of the following scrambling types.
B–9