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CDM-Qx Satellite Modem
Summary of Specifications
TURBO PRODUCT
CODEC
Rate 17/18 QPSK
For:
Rate 17/18 8-PSK
BER=10
BER
(With two adjacent
BER=10
carriers, each 7 dB
higher than the
BER=10
desired carrier)
HIGHER-ORDER
MODULATION AND
CODING
(With two adjacent
For:
carriers, each 7 dB
higher than the
BER=10
desired carrier)
BER=10
Selectable size of 512, 1024, 2048, 4096, 8192, 16384 and a32768 bits
Plesiochronous/
Size selection is displayed in bytes
Doppler Buffer
Supports asymmetric operation - when buffer is clocked from Tx clock, Rx and Tx rates do not
need to be identical
Eb/No estimate, 2 to 16 dB (± 0.10 dB accuracy)
Monitor Functions
Corrected Bit Error Rate, 1E-3 to 1E-10
Frequency offset, ± 32 kHz range, 100 Hz resolution (70/140 MHz IF)
Frequency offset, ± 200 kHz range, 100 Hz resolution (L-Band)
Buffer fill state, in percent
Receive signal level accuracy = ± 3.0 dB)
Rate 17/18 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
-6
6.4 dB (6.0 dB)
-7
6.7 dB (6.3 dB)
-8
6.9 dB (6.5 dB)
16-QAM Rate 3/4
Viterbi/RS
Guaranteed Eb/No:
(typical value in
parentheses)
-6
8.1 dB (7.5 dB)
-8
8.6 dB (8.0 dB)
A–5
Rate 17/18 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
9.3 dB (8.9 dB)
9.8 dB (9.4 dB)
10.3 dB (9.9 dB)
16-QAM Rate 7/8
Viterbi/RS
Guaranteed Eb/No:
(typical value in
parentheses)
9.5 dB (9.0 dB)
10.1 dB (9.5 dB)
Revision 6
MN/CDMQx.IOM
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