Comtech EF Data C5 - Manual (Page 40)

Specifications C5/K1/K3 Integrated Satellite Terminal System
2–6 Rev. 0
2.1.4.2 Modulation and Encoding Types
Refer to Table 2-6 for combinations of modulation and forward error correction encoding.
Table 2-6. C-Band Modulation Encoding Types
Encoder Code Rate Modulation
Viterbi, K7 1/2 BPSK
Viterbi, K7
Reed-Solomon 1/2
225/205 Closed BPSK
BPSK
Viterbi, K7 1/2, 3/4, 7/8 QPSK
Viterbi, K7
Reed-Solomon 1/2, 3/4, 7/8
225/205 Closed QPSK
QPSK
Sequential 1/2 BPSK
Sequential
Reed Solomon 1/2
225/205 Closed BPSK
BSPK
Sequential (EFD, CSD, FDC) 1/2, 3/4, 7/8 QPSK
Sequential
Reed-Solomon 1/2, 3/4, 7/8
225/205 Closed QPSK
QPSK
Note: Reed-Solomon concatenated coding uses INTELSAT IESS 308/309 polynomial and
is fully capable with SDM-300/SDM-300A closed network operation.
2.1.4.3 Scrambling Types
The customer may select one of the following:
( CCITT V.35 (EFData/Comstream compatible). Sequential only.
( CCITT V.35 INTELSAT modified. Viterbi only.
( Fairchild compatible. Sequential only.
( 2 15
–1 Synchronous for use in ASYNC overhead mode.
( Modified V.35 (Closed Network Reed-Solomon).
( None.
2.1.4.4 Interleaver (Reed-Solomon Codec)
Depth 8 (Closed Network, ASYNC).
Note: The Reed-Solomon depth 8 interleaver is based on the IESS-310 specification for
8PSK and is adapted for QPSK/PRSK operation.