Summary Of Specifications; Demodulator - Comtech EF Data CDD-562AL Installation And Operation Manual

CDD-562AL/564A/L Multi-Channel Demodulator
Introduction
Option
VFS
1.4

Summary of Specifications

1.4.1

Demodulator

Parameters
Modulation
Symbol Rate Range
Data Rate Range
Operating Modes
FEC
Scrambling
Acquisition Range
Acquisition Time
Description and Comments
ViperSat File Streamer
Specifications
BPSK, QPSK, 8-PSK, 8-QAM and 16-QAM
16Ksps to 3.0 Msps
16 kbps to 10.239 Mbps
•
Turbo Product Codec – 2nd Generation Rates 21/44, 5/16, 3/4, 7/8,
and 0.95 (optional plug-in module for rate 0.95)
•
VersaFEC® Codec (short-block, low latency and ultra-low-latency
LDPC)
None: Uncoded BPSK/QPSK
Turbo Product Codec, 4-bit soft-decision:
Rate 5/16 BPSK – 2 dimensional
Rate 21/44 BPSK – 3 dimensional
Rate 21/44 QPSK – 3 dimensional
Rate 3/4 QPSK/8-PSK/8-QAM/16-QAM – 2 dimensional
Rate 7/8 QPSK/8-PSK/8-QAM/16-QAM – 2 dimensional
Rate 0.95 (optional plug-in card) QPSK/8-QAM/8-PSK –
2 dimensional eTPC (exact Code Rate is actually 17/18, or 0.944)
VersaFEC Codec, 6-bit soft-decision (FAST Option):
Rate 0.488 BPSK (also 0.493 BPSK Ultra-Low-Latency
Rate 0.533, 0.631, 0.706, 0.803 QPSK (0.493, 0.654, 0.734 Ultra-
Low-Latency
Rate 0.642, 0.711, 0.780 8-QAM (also 0.576 8-QAM Extended
CCM
Rate 0.731, 0.780, 0.829, 0.853 16-QAM (also 0.644 16-QAM
Extended CCM
Transparent Closed Network mode - per ITU V.35 (Intelsat variant)
Turbo Product Code mode - externally frame synchronized – proprietary
±1 to ±32 kHz, programmable in 1 kHz increments, for symbol rates
below 625 ksymbols/sec
±1 to ±200 kHz, 1 kHz increments, for symbol rates above 625
ksymbols/sec, L-Band only
Highly dependent on data rate, FEC rate, and demodulator acquisition
range.
1–14
Revision 0
MN-CDD562AL/564AL
Installation
Method
FAST