Comtech EF Data CDM-625A - Manual (Page 64)

CDM-625A Advanced Satellite Modem MN-CDM625A
Introduction Revision 3
1–20
VersaFEC-2 Short Block
CODEC BER
BPSK
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
For BER=10 -X Rate – Guaranteed Eb/No (typical value in parentheses)
BER=10 -4
BER=10 -8
Rate 0.489 BPSK
2.6 dB (2.3 dB)
3.2 dB (2.9 dB)
VersaFEC-2 Short Block
CODEC BER
QPSK
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
BER=10 -4
BER=10 -8
Rate 0.977 QPSK
2.3 dB (1.4 dB)
2.7 dB (1.6 dB)
Rate 1.075 QPSK
2.4 dB (2.1 dB)
2.0 dB (1.7 dB)
Rate 1.173 QPSK
2.5 dB (2.2 dB)
3.0 dB (2.7 dB)
Rate 1.221 QPSK
2.6 dB (2.3 dB)
3.1 dB (2.8 dB)
BER=10 -4
BER=10 -8
Rate 1.270 QPSK
2.8 dB (2.5 dB)
3.2 dB (2.9 dB)
Rate 1.319 QPSK
2.9 dB (2.6 dB)
3.3 dB (3.0 dB)
Rate 1.368 QPSK
3.0 dB (2.7 dB)
3.4 dB (3.1 dB)
Rate 1.466 QPSK
3.4 dB (3.1 dB)
3.8 dB (3.5 dB)
VersaFEC-2 Short Block
CODEC BER
8-ARY
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
BER=10 -4
BER=10 -8
Rate 1.564 8-ARY
3.5 dB (3.2 dB)
4.0 dB (3.7 dB)
Rate 1.612 8-ARY
3.5 dB (3.2 dB)
4.1 dB (3.8 dB)
Rate 1.686 8-ARY
3.6 dB (3.6 dB)
4.2 dB (3.9 dB)
Rate 1.759 8-ARY
3.7 dB (3.4 dB)
4.2 dB (3.9 dB)
BER=10 -4
BER=10 -8
Rate 1.832 8-ARY
3.9 dB (3.6 dB)
4.3 dB (4.0 dB)
Rate 1.906 8-ARY
3.9 dB (3.6 dB)
4.4 dB (4.1 dB)
Rate 1.979 8-ARY
4.1 dB (3.8 dB)
4.5 dB (4.2 dB)
Rate 2.052 8-ARY
4.4 dB (4.1 dB)
4.7 dB (4.4 dB)
BER=10 -4
BER=10 -8
Rate 2.125 8-ARY
4.5 dB (4.2 dB)
4.8 dB (4.5 dB)
Rate 2.199 8-ARY
4.8 dB (4.5 dB)
5.2 dB (4.9 dB)
VersaFEC-2 Short Block
CODEC BER
16-ARY
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
BER=10 -4
BER=10 -8
Rate 2.345 16-ARY
4.8 dB (4.5 dB)
5.3 dB (5.0 dB)
Rate 2.443 16-ARY
5.0 dB (4.7 dB)
5.4 dB (5.1 dB)
Rate 2.541 16-ARY
5.3 dB (5.0 dB)
5.6 dB (5.3 dB)
Rate 2.638 16-ARY
5.5 dB (5.2 dB)
5.8 dB (5.5 dB)
BER=10 -4
BER=10 -8
Rate 2.736 16-ARY
5.7 dB (5.4 dB)
6.2 dB (5.9 dB)
Rate 2.834 16-ARY
6.1 dB (5.8 dB)
6.5 dB (6.2 dB)
Rate 2.932 16-ARY
6.2 dB (5.9 dB)
6.6 dB (6.3 dB)
Rate 3.029 16-ARY
6.7 dB (6.4 dB)
7.1 dB (6.8 dB)
BER=10 -4
BER=10 -8
Rate 3.127 16-ARY
7.0 dB (6.7 dB)
7.5 dB (7.2 dB)
VersaFEC-2 Short Block
CODEC BER
32-ARY
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
BER=10 -4
BER=10 -8
Rate 3.298 32-ARY
7.3 dB (7.0 dB)
7.9 dB (7.6 dB)
Rate 3.420 32-ARY
7.5 dB (7.2 dB)
8.1 dB (7.8 dB)
Rate 3.542 32-ARY
7.7 dB (7.4 dB)
8.2 dB (7.9 dB)
Rate 3.664 32-ARY
8.2 dB (7.9 dB)
8.7 dB (8.4 dB)
BER=10 -4
BER=10 -8
Rate 3.787 32-ARY
8.4 dB (8.1 dB)
8.9 dB (8.6 dB)
Rate 3.909 32-ARY
8.7 dB (8.4 dB)
9.2 dB (8.9 dB)
Rate 4.007 32-ARY
9.1 dB (8.8 dB)
9.5 dB (9.2 dB)
Rate 4.153 32-ARY
9.5 dB (9.2 dB)
9.9 dB (9.6 dB)
Ultra-Low-Latency (ULL)
CODEC BER
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -8
Rate 0.493 BPSK
3.1 dB (2.8 dB)
3.7 dB (3.4 dB)
Rate 0.493 QPSK
3.1 dB (2.8 dB)
3.7 dB (3.4 dB)
Rate 0.654 QPSK
3.6 dB (3.3 dB)
4.2 dB (3.9 dB)
Rate 0.734 QPSK
4.1 dB (3.8 dB)
4.7 dB (4.4 dB)
Notes:
1) Rate 21/44 QPSK is shown as Rate 1/2 on the Front Panel display, etc.
2) The demod acquisition and tracking threshold for OQPSK is approx 1 dB worse than the QPSK
case in this mode.