Comtech EF Data CDM-625 - Manual (Page 53)

CDM-625 Advanced Satellite Modem Revision 15
Introduction MN-CDM625
1–17
TURBO PRODUCT CODEC
BER (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 -5
BER=10 -8
Rate 7/8 (Q, OQ)
4.3 dB (4.0 dB)
4.5 dB (4.2 dB)
Rate 7/8 (8PSK, 8-QAM)
7.0 dB (6.7 dB)
7.2 dB (6.8 dB)
Rate 7/8 (16-QAM)
8.1 dB (7.7 dB)
8.4 dB (8.1 dB)
TURBO PRODUCT CODEC
BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
BER=10 -6
BER=10 -7
BER=10 -8
Rate 0.95 (Q, OQ)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
6.9 dB (6.5 dB)
Rate 0.95 (8PSK, 8-QAM)
9.6 dB (9.2 dB)
10.1 dB (9.7 dB)
10.6 dB (10.2 dB)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -9
Rate 1/2 (B, Q, OQ)* LDPC
2.0 dB (1.7 dB)
2.3 dB (2.0 dB)
* See Note 2
Rate 2/3 (Q, OQ) LDPC
2.3 dB (2.0 dB)
2.7 dB (2.3 dB)
Rate 3/4 (Q, OQ) LDPC
3.0 dB (2.6 dB)
3.3 dB (3.0 dB)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -9
Rate 2/3 8PSK LDPC
---
5.7 dB (5.2 dB)
Rate 3/4 8PSK LDPC
5.6 dB (5.2 dB)
6.0 dB (5.6 dB)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -9
Rate 2/3 8-QAM LDPC
4.6 dB (4.2 dB)
5.0 dB (4.6 dB)
Rate 3/4 8-QAM LDPC
5.6 dB (5.2 dB)
6.0 dB (5.6 dB)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -9
Rate 3/4 16-QAM LDPC
6.8 dB (6.2 dB)
7.1 dB (6.8 dB)
VersaFEC CODEC BER
BPSK (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
BER=10 -5
BER=10 -8
Rate 0.488
2.4 dB (2.1 dB)
2.7 dB (2.4 dB)
VersaFEC CODEC BER
QPSK (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
BER=10 -5
BER=10 -8
Rate 0.533 QPSK
2.3 dB (2.0 dB)
2.5 dB (2.2 dB)
Rate 0.631 QPSK
2.8 dB (2.5 dB)
3.0 dB (2.7 dB)
Rate 0.706 QPSK
3.3 dB (3.0 dB)
3.7 dB (3.4 dB)
Rate 0.803 QPSK
3.8 dB (3.5 dB)
4.1 dB (3.8 dB)
VersaFEC CODEC BER
8-QAM (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
BER=10 -5
BER=10 -8
Rate 0.642 8-QAM
4.6 dB (4.3 dB)
4.9 dB (4.6 dB)
Rate 0.711 8-QAM
5.2 dB (4.9 dB)
5.5 dB (5.2 dB)
Rate 0.780 8-QAM
5.6 dB (5.3 dB)
6.0 dB (5.7 dB)
VersaFEC CODEC BER
16-QAM (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
BER=10 -5
BER=10 -8
Rate 0.731 16-QAM
6.4 dB (6.1 dB)
6.6 dB (6.3 dB)
Rate 0.780 16-QAM
7.0 dB (6.7 dB)
7.3 dB (7.0 dB)
Rate 0.829 16-QAM
7.5 dB (7.2 dB)
7.8 dB (7.5 dB)
Rate 0.853 16-QAM
8.0 dB (7.7 dB)
8.3 dB (8.0 dB)
VersaFEC CODEC –
Extended CCM BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
BER=10 -5
BER=10 -8
Rate 0.576 8-QAM
4.5 dB (4.2 dB)
4.9 dB (4.6 dB)
Rate 0.644 16-QAM
6.4 dB (6.1 dB)
6.9 dB (6.6 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.