Comtech EF Data CDM-550T - Manual (Page 111)

Chapter 14. SUMMARY OF
SPECIFICATIONS
14.1 MODULATOR
Modulation BPSK, QPSK, and Offset QPSK
Data rate range •
Overall, 2.4 - 2048 kbps
•
4.8 kbps - 2048 kbps, Uncoded BPSK
•
9.6 kbps - 2048 kbps, Uncoded QPSK/OQPSK
•
2.4 kbps - 1024 kbps, Rate 1/2 BPSK
•
4.8 kbps - 2048 kbps, Rate 1/2 QPSK/OQPSK
•
7.2 kbps - 2048 kbps, Rate 3/4 QPSK/OQPSK
•
8.4 kbps - 2048 kbps, Rate 7/8 QPSK/OQPSK
•
2.4 kbps - 1145 kbps, Rate 21/44 BPSK Turbo
•
2.4 kbps - 750 kbps, Rate 5/16 BPSK Turbo
•
4.8 kbps - 2048 kbps, Rate 1/2 QPSK Turbo
•
7.2 kbps - 2048 kbps, Rate 3/4 QPSK/OQPSK Turbo
Operating modes •
Transparent, Closed Network
•
Proprietary EDMAC framed mode:
o 5% overhead addition - all modes except BPSK Turbo
o 1.5% overhead addition - Rate 21/44 and 5/16 Turbo
•
RS Outer Codec (optional)
•
Turbo Product Codec (optional):
o Rate 1/2 QPSK
o Rate 3/4 QPSK/OQPSK
o Rate 21/44 BPSK
o Rate 5/16 BPSK
•
Automatic Uplink Power Contol (AUPC) mode
Transmit filtering Per INTELSAT IESS 308 (64 to 512 tap FIR digital filter implementation)
Scrambling •
Transparent mode, no R-S coding - per CCITT V.35
•
EDMAC mode, no R-S coding - externally synchronized
•
Turbo Product Code mode - externally synchronized
•
All R-S modes - externally synchronized per IESS 308
14–1