Chapter 14. Summary Of Specifications; Modulator - Comtech EF Data CDM-600L Installation And Operation Manual

14.1

Modulator

Modulation
Symbol rate range
Data rate range
Operating modes
Transmit filtering
Chapter 14. SUMMARY OF
BPSK, QPSK, Offset QPSK, 8-PSK, and 16-QAM
4.8 ksps to 10.0 Msps
See Section 14.5
Open Network, per Intelsat IESS-308/-309/-310 (IDR, IBS/SMS)
E1/T1 Drop and Insert
Transparent, Closed Network
Proprietary EDMAC framed mode:
* 5% overhead - all modes except BPSK Turbo, Rate 1/2 Q/OQPSK Turbo, and data rates
< 2.048 Mbps
* 1.5% overhead - Rate 21/44, 5/16 Turbo, Rate 1/2 Q/OQPSK Turbo, and all other rates
>2.048 Mbps
RS Outer Codec
Turbo Product Codec – Low Rate (optional):
* Rate 5/16 BPSK
* Rate 21/44 BPSK
* Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM
Turbo Product Codec – High Rate (optional):
* Rate 5/16 BPSK (not available at time of this release)
* Rate 21/44 BPSK
* Rate 1/2 QPSK/OQPSK (exact Code Rate is actually 0.477)
* Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM
* Rate 7/8 QPSK/OQPSK/8-PSK/16-QAM
* Rate 0.95 QPSK/OQPSK/8-PSK (exact Code Rate is actually 0.944)
Automatic Uplink Power Contol (AUPC) mode
High Rate ESC (planned future upgrade – consult Manufacturer for latest information)
Per INTELSAT IESS-308 (FIR digital filter implementation)
SPECIFICATIONS
14–1