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CDM-Qx Satellite Modem Revision 5
Summary of Specifications MN/CDMQx.IOM
A–4
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
BER=10
-7
BER=10
-8
3.1 dB (2.7 dB)
3.3 dB (2.8 dB)
3.1 dB (2.8 dB)
3.3 dB (2.90dB)
2.6 dB (2.3dB)
2.7 dB (2.4dB)
TURBO PRODUCT
CODEC
Rate 3/4 QPSK
Rate 3/4 8-PSK
Rate 3/4 16-QAM
BER
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 3/4 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
3.8dB (3.4dB)
4.1dB (3.7dB)
4.4dB (4.0dB)
Rate 3/4 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
6.2 dB (5.8 dB)
6.4 dB (6.0 dB)
6.8 dB (6.3 dB)
Rate 3/4 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
7.4dB (7.0 dB)
7.8 dB (7.3 dB)
8.2 dB (7.7 dB)
TURBO PRODUCT
CODEC
Rate 7/8 QPSK
Rate 7/8 8-PSK
Rate 7/8 16-QAM
BER
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 7/8 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
4.3 dB (4.0 dB)
4.4 dB (4.1 dB)
4.5 dB (4.2 dB)
Rate 7/8 (8-PSK)
Guaranteed Eb/No:
(typical value in
parentheses)
7.3 dB (6.6 dB)
7.4 dB (6.7 dB)
7.5 dB (6.8 dB)
Rate 7/8 (16-QAM)
Guaranteed Eb/No:
(typical value in
parentheses)
8.1 dB (7.7 dB)
8.2 dB (7.8 dB)
8.3 dB (7.9 dB)
TURBO PRODUCT
CODEC
Rate 17/18 QPSK
Rate 17/18 8-PSK
BER
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
For:
BER=10
-6
BER=10
-7
BER=10
-8
Rate 17/18 (Q)
Guaranteed Eb/No:
(typical value in
parentheses)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
6.9 dB (6.5 dB)
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)
HIGHER-ORDER
MODULATION AND
CODING
(With two adjacent
carriers, each 7 dB
higher than the
desired carrier)
For:
BER=10
-6
BER=10
-8
16-QAM Rate 3/4
Viterbi/RS
Guaranteed Eb/No:
(typical value in
parentheses)
8.1 dB (7.5 dB)
8.6 dB (8.0 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)
Plesiochronous/
Doppler Buffer
Selectable size of 1024, 2048, 4096, 8192, 16384 and 32768 bits
Size selection is displayed in bytes and milliseconds
Supports asymmetric operation - when buffer is clocked from Tx clock, Rx and Tx rates do not
need to be identical
Monitor Functions
Eb/No estimate, 2 to 16 dB (± 0.10 dB accuracy)
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)