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CDM-600L Satellite Modem
Summary of Specifications
FEC
Acquisition range
Acquisition time
Clock tracking range
LNB 10 MHz
Reference
LNB Voltage
LNB Current Alarm
VITERBI
BER performance
(met in the presence
of two adjacent
carriers, each 7 dB
higher than the
desired carrier)
Viterbi: 3 bit soft decision
Sequential: 2 bit soft decision
Trellis: Per IESS-310
Reed-Solomon(Open Network): Per IESS-308/-309/-310
Reed-Solomon(Closed Network): Proprietary
Turbo Product Codec: 6 bit soft decision, proprietary
LDPC: 5 bit soft decision, proprietary
± to ± 32 kHz, programmable in 1kHz increments
6 db Eb/No with ± 32 kHz frequency Uncertainty
Code Rate
1/2
< 9.6 kbps
1/2
≥ 9.6 kbps < 64 kbps
1/2
≥ 64 kbps < 196 kbps
1/2
≥ 196
3/4
9.6 kbps
7/8
9.6 kbps
6db Eb/No with ± 32 kHz Frequency Uncertainty
Code Rate
1/2
< 9.6 kbps
1/2
≥ 9.6 kbps < 64 kbps
1/2
≥ 64 kbps < 196 kbps
1/2
≥ 196
3/4
9.6 kbps
7/8
9.6 kbps
6db Eb/No with ± 32 kHz Frequency Uncertainty
Code Rate/Mod
5/16 BPSK
9.6 kbps
21/44 BPSK
9.6 kbps
± 100 ppm min
On center conductor of L-band input connector, selectable ON/OFF. Level –3 ± 3 dBm.
Source:
1. Internal modem reference
2. External reference
Performance: For phase noise, refer to L-band modulator 10 MHz. Frequency stability
same as the modulator 10 MHz reference.
On center conductor of L-band input connector, selectable ON/OFF, 13, 18 volts per DiSEq
4.2 and 24VDC at 500 mA maximum.
Programmable MIN and MAX current alarms.
Rate 1/2 (B, Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
For:
-5
BER=10
5.4 dB (4.9 dB)
-6
BER=10
6.0 dB (5.5 dB)
-7
BER=10
6.7 dB (6.2 dB)
Viterbi QPSK
Data Rate
< 35 sec
< 15 sec
< 2 sec
< 1 sec
< 25 sec
< 30 sec
Sequential QPSK
Data Rate
< 40 sec
< 15 sec
< 2 sec
< 1 sec
< 25 sec
< 30 sec
Turbo
Data Rate
< 6 sec
< 15 sec
Rate 3/4 (Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
6.8 dB (6.3 dB)
7.4 dB (6.9 dB)
8.2 dB (7.7 dB)
15–5
Revision 2
MN/CDM600L.IOM
Tacq
P(t<Tacq)
95%
95%
95%
95%
95%
95%
Tacq
P(t<Tacq)
95%
95%
95%
95%
95%
95%
Tacq
P(t<Tacq)
95%
95%
Rate 7/8 (Q, OQ)
Guaranteed Eb/No:
(typical value in
parentheses)
7.7 dB (7.2 dB)
8.4 dB (7.9 dB)
9.0 dB (8.6 dB)
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