Comtech EF Data CDM-750 User Manual
Page 285
CDM-750 Advanced High-Speed Trunking Modem
Revision 2
Appendix E
MN-CDM750
E–3
Table E-1. CDM-750 Co+No/No to C/N (Es/No) and Eb/No (dB) for DVB-S2 QPSK and 8PSK
(DVB-S2 uses C/N (Es/No), and Eb/No is shown for information)
Spectral Efficiency Normal Block
Mode Pilots ON ►
QPSK
8PSK
0.478577 0.640827 0.770627 0.965327 1.160026 1.290788 1.452076 1.549426 1.615288 1.724416 1.746049 1.739569 1.935658 2.177525 2.422276 2.585924 2.618365
Code Rate ►
1/4 1/3 2/5 1/2 3/5 2/3 3/4 4/5 5/6 8/9 9/10 3/5 2/3 3/4 5/6 8/9 9/10
(Co+No)/No C/N
=
Es/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No
2.6 -0.9
2.3
1.1
0.3
-0.7
-1.5
-2.0
-2.5
-2.8
-2.9
-3.2
-3.3
-3.3
-3.7
-4.2
-4.7
-5.0
-5.0
2.9 -0.2
3.0
1.7
0.9
-0.1
-0.9
-1.3
-1.8
-2.1
-2.3
-2.6
-2.6
-2.6
-3.1
-3.6
-4.1
-4.3
-4.4
3.2 0.4
3.6
2.3
1.5
0.5
-0.3
-0.7
-1.2
-1.5
-1.7
-2.0
-2.0
-2.0
-2.5
-3.0
-3.5
-3.8
-3.8
3.5 0.9
4.1
2.9
2.1
1.1
0.3
-0.2
-0.7
-1.0
-1.2
-1.4
-1.5
-1.5
-1.9
-2.4
-2.9
-3.2
-3.3
3.8 1.5
4.7
3.4
2.6 1.6 0.8
0.3
-0.2
-0.4
-0.6
-0.9
-1.0
-0.9
-1.4
-1.9
-2.4
-2.7
-2.7
4.1 2.0
5.2
3.9
3.1 2.1 1.3
0.9
0.3
0.1
-0.1
-0.4
-0.5
-0.4
-0.9
-1.4
-1.9
-2.2
-2.2
4.4 2.4
5.6
4.4
3.6 2.6 1.8
1.3
0.8
0.5
0.4
0.1
0.0
0.0
-0.4
-0.9
-1.4
-1.7
-1.7
4.7 2.9
6.1
4.8
4.0 3.1 2.3 1.8
1.3
1.0
0.8
0.5
0.5
0.5
0.0
-0.5
-0.9
-1.2
-1.3
5.0 3.3
6.5
5.3
4.5 3.5 2.7 2.2
1.7
1.4
1.3
1.0
0.9
0.9
0.5
0.0
-0.5
-0.8
-0.8
5.3 3.8
7.0
5.7
4.9 3.9 3.1 2.7 2.2
1.9
1.7
1.4
1.4
1.4
0.9
0.4
-0.1
-0.3
-0.4
5.6 4.2
7.4
6.1
5.3 4.4 3.6 3.1 2.6
2.3
2.1
1.8
1.8
1.8
1.3
0.8
0.4
0.1
0.0
5.9 4.6
7.8
6.5
5.7 4.8 4.0 3.5 3.0 2.7
2.5
2.2
2.2
2.2
1.7
1.2
0.8
0.5
0.4
6.2 5.0
8.2
6.9
6.1 5.2 4.4 3.9 3.4 3.1
2.9
2.6
2.6
2.6
2.1
1.6
1.2
0.9
0.8
6.5 5.4
8.6
7.3
6.5 5.6 4.8 4.3 3.8 3.5 3.3
3.0
3.0
3.0
2.5
2.0
1.6
1.3
1.2
6.8 5.8
9.0
7.7
6.9 5.9 5.1 4.7 4.2 3.9 3.7 3.4
3.4
3.4
2.9
2.4
1.9
1.7
1.6
7.1 6.2
9.4
8.1
7.3 6.3 5.5 5.0 4.5 4.3 4.1 3.8
3.7
3.8
3.3
2.8
2.3
2.0
2.0
7.4 6.5
9.7
8.5
7.7 6.7 5.9 5.4 4.9 4.6 4.4 4.2
4.1 4.1 3.7
3.1
2.7
2.4
2.3
7.7 6.9
10.1
8.8
8.0 7.0 6.2 5.8 5.3 5.0 4.8 4.5 4.5 4.5 4.0
3.5
3.0
2.8
2.7
8.0 7.3
10.5
9.2
8.4 7.4 6.6 6.1 5.6 5.3 5.2 4.9 4.8 4.8 4.4
3.9
3.4
3.1
3.1
8.3 7.6
10.8
9.5
8.7 7.8 7.0 6.5 6.0 5.7 5.5 5.2 5.2 5.2 4.7 4.2
3.8
3.5
3.4
8.6 8.0
11.2
9.9
9.1 8.1 7.3 6.8 6.3 6.1 5.9 5.6 5.5 5.6 5.1 4.6
4.1
3.8
3.8
8.9 8.3
11.5
10.2
9.4 8.5 7.7 7.2 6.7 6.4 6.2 5.9 5.9 5.9 5.4 4.9
4.5
4.2
4.1
9.2 8.6
11.8
10.6
9.8 8.8 8.0 7.5 7.0 6.7 6.6 6.3 6.2 6.2 5.8 5.3 4.8
4.5
4.5
9.5 9.0
12.2
10.9
10.1 9.1 8.3 7.9 7.4 7.1 6.9 6.6 6.6 6.6 6.1 5.6 5.1
4.9
4.8
9.8 9.3
12.5
11.3
10.5 9.5 8.7 8.2 7.7 7.4 7.2 7.0 6.9 6.9 6.5 5.9 5.5
5.2
5.1
10.1 9.7
12.9
11.6
10.8 9.8 9.0 8.5 8.0 7.8 7.6 7.3 7.2 7.2 6.8 6.3 5.8
5.5
5.5
10.4 10.0
13.2
11.9
11.1 10.1 9.3 8.9 8.4 8.1 7.9 7.6 7.6 7.6 7.1 6.6 6.1 5.9
5.8
10.7 10.3
13.5
12.2
11.4 10.5 9.7 9.2 8.7 8.4 8.2 7.9 7.9 7.9 7.4 6.9 6.5 6.2
6.1
11.0 10.6
13.8
12.6
11.8 10.8 10.0 9.5 9.0 8.7 8.6 8.3 8.2 8.2 7.8 7.3 6.8 6.5
6.5
11.3 11.0
14.2
12.9
12.1 11.1 10.3 9.9 9.3 9.1 8.9 8.6 8.5 8.6 8.1 7.6 7.1 6.8
6.8
11.6 11.3
14.5
13.2
12.4 11.4 10.6 10.2 9.7 9.4 9.2 8.9 8.9 8.9 8.4 7.9 7.4 7.2 7.1
11.9 11.6
14.8
13.5
12.7 11.8 11.0 10.5 10.0 9.7 9.5 9.2 9.2 9.2 8.7 8.2 7.8 7.5 7.4
12.2 11.9
15.1
13.9
13.1 12.1 11.3 10.8 10.3 10.0 9.8 9.6 9.5 9.5 9.1 8.6 8.1 7.8 7.7
12.5 12.2
15.4
14.2
13.4 12.4 11.6 11.1 10.6 10.3 10.2 9.9 9.8 9.8 9.4 8.9 8.4 8.1 8.1
12.8 12.6
15.8
14.5
13.7 12.7 11.9 11.5 10.9 10.7 10.5 10.2 10.1 10.2 9.7 9.2 8.7 8.4 8.4
Notes:
1. Eb/No = Es/No – 10
log
(Spectral Efficiency).
2. The required C/N for QEF with Short Frames is typically 0.2 to 0.3 dB higher.
3. Shaded areas are high error rate or unstable.