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CDM-600L Satellite Modem
Summary of Specifications
Transmit filtering
Scrambling
FEC
Output frequency
External Reference
Harmonics
and spurious
Tx On/Off Ratio
Output Connector
Tx Return Loss
Per INTELSAT IESS-308 (FIR digital filter implementation)
IDR Mode, no R-S, - per ITU V.35 (Intelsat variant)
IBS mode, no R-S - per IESS-309, externally frame synchronized
Transparent Closed Network mode, no R-S or Turbo coding - per ITU V.35 (Intelsat variant)
EDMAC mode, no RS coding - externally frame synchronized - proprietary
Turbo Product Code mode - externally frame synchronized - proprietary
All R-S modes - externally frame synchronized per IESS-308/-309/-310
None: Uncoded BPSK/QPSK/OQPSK
Viterbi: k=7, per IESS-308/309
BPSK: Rate 1/2
QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8
16-QAM: Rate 3/4 and Rate 7/8 (Viterbi plus Reed-Solomon only)
Sequential:
k=36 (Rate 1/2) per IESS-309
k= 63 (Rate 3/4) per IESS-309
k= 87 (Rate 7/8)
Important note: Sequential decoding limits the data rate to a maximum of 2.048 Mbps for
OQPSK and 1.024 Mbps for BPSK.
Reed-Solomon (Open Network):
IDR modes:
225/205 for T1
219/201 for E1 and IESS-310 mode,
194/178 for T2 and E2
IBS modes:
126/112
219/201 for IESS-310 mode
Reed-Solomon (Closed Network):
220,200 outer code (transparent mode)
225,205 outer code (transparent mode, EF Data compatible, V.35 scrambling)
126,112 outer code (transparent mode, IBS parameters, D&I++ mode)
219,201 outer code (transparent mode, IESS-310 parameters)
200,180 outer code (EDMAC modes)
Interleaver depth = 4 or 8 (Viterbi, depending on mode)
Interleaver depth = 8 (Sequential)
8-PSK/TCM Rate 2/3 (Trellis): Per IESS-310
Turbo Product Codec, Low Rate (1
Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
Rate 21/44 BPSK - 3 dimensional
Rate 5/16 BPSK - 3 dimensional
Turbo Product Codec, High Rate (2
Rate 5/16 BPSK - 2 dimensional
Rate 21/44 BPSK - 3 dimensional
Rate 1/2 QPSK/OQPSK - 3 dimensional (exact Code Rate is actually 0.477)
Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
Rate 7/8 QPSK/OQPSK/8-PSK/16-QAM - 2 dimensional
Rate 0.95 QPSK/OQPSK/8-PSK - 2 dimensional TPC (exact Code Rate is actually 0.944)
Low Density Parity Check (LDPC) Codec (Optional plug-in card):
Rate 1/2 BPSK/QPSK/OQPSK
Rate 2/3 QPSK/OQPSK/8-PSK/8-QAM
Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM
950 - 1950 MHz, 100 Hz resolution
Stability ± 0.02 ppm, 0 to 50
o
Stability ± 1 ppm, 0 to 50
1, 2, 5, 10, or 20 MHz @ 0 dBm to +20 dBm.
Internal reference phase locks to external reference.
Better than -55 dBC/4 kHz (typically <-60 dBC/4kHz) – measured from 50 to 2500 MHz
-75 dBm maximum
Type N Female, 50Ω
≥ 14 dB
st
Generation) (Optional plug-in card):
nd
Generation) (Optional plug-in card):
o
o
o
C (32
to 122
F) (standard high stability internal reference)
o
o
C (32
to 122
F) (Optional low-stability internal reference)
15–2
Revision 2
MN/CDM600L.IOM
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