Comtech EF Data CDM-750 User Manual
Page 286
CDM-750 Advanced High-Speed Trunking Modem
Revision 2
Appendix E
MN-CDM750
E–4
Table E-2. CDM-750 Co+No/No to C/N (Es/No) and Eb/No (dB) for DVB-S2 16APSK and 32APSK
(DVB-S2 uses C/N (Es/No), and Eb/No is shown for information)
Spectral Efficiency Normal
Block Mode Pilots ON ►
16APSK 32APSK
2.574613 2.896320 3.090495 3.221863 3.439530 3.482680 3.623332 3.866247 4.030589 4.302894 4.356875
Code Rate ►
2/3
3/4
4/5
5/6
8/9
9/10
3/4
4/5
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
9.8 9.3 5.2
4.7
4.4
4.2
4.0
3.9
3.7
3.4
3.3
3.0
2.9
10.1 9.7 5.5
5.0
4.8
4.6
4.3
4.2
4.1
3.8
3.6
3.3
3.3
10.4 10.0 5.9 5.4
5.1
4.9
4.6
4.6
4.4
4.1
3.9
3.6
3.6
10.7 10.3 6.2 5.7
5.4
5.2
4.9
4.9
4.7
4.4
4.3
4.0
3.9
11.0 10.6 6.5 6.0
5.7
5.6
5.3
5.2
5.0
4.8
4.6
4.3
4.2
11.3 11.0 6.9 6.3 6.1
5.9
5.6
5.5
5.4
5.1
4.9
4.6
4.6
11.6 11.3 7.2 6.7 6.4
6.2
5.9
5.9
5.7
5.4
5.2
5.0
4.9
11.9 11.6 7.5 7.0 6.7
6.5
6.2
6.2
6.0
5.7
5.6
5.3
5.2
12.2 11.9 7.8 7.3 7.0
6.8
6.6
6.5
6.3
6.1
5.9
5.6
5.5
12.5 12.2 8.1 7.6 7.3 7.2
6.9
6.8
6.7
6.4
6.2
5.9
5.9
12.8 12.6 8.5 7.9 7.7 7.5 7.2
7.1
7.0
6.7
6.5
6.2
6.2
13.1 12.9 8.8 8.3 8.0 7.8 7.5
7.5
7.3
7.0
6.8
6.5
6.5
13.4 13.2 9.1 8.6 8.3 8.1 7.8
7.8
7.6
7.3
7.1
6.9
6.8
13.7 13.5 9.4 8.9 8.6 8.4 8.1
8.1
7.9
7.6
7.5
7.2
7.1
14.0 13.8 9.7 9.2 8.9 8.7 8.5 8.4
8.2
8.0
7.8
7.5
7.4
14.3 14.1 10.0 9.5 9.2 9.1 8.8 8.7 8.5
8.3
8.1
7.8
7.7
14.6 14.4 10.3 9.8 9.5 9.4 9.1 9.0 8.9
8.6
8.4
8.1
8.1
14.9 14.8 10.7 10.1 9.9 9.7 9.4 9.3 9.2 8.9
8.7
8.4
8.4
15.2 15.1 11.0 10.4 10.2 10.0 9.7 9.6 9.5 9.2
9.0
8.7
8.7
15.5 15.4 11.3 10.8 10.5 10.3 10.0 10.0 9.8 9.5
9.3
9.0
9.0
15.8 15.7 11.6 11.1 10.8 10.6 10.3 10.3 10.1 9.8
9.6
9.3
9.3
16.1 16.0 11.9 11.4 11.1 10.9 10.6 10.6 10.4 10.1 9.9
9.7
9.6
16.4 16.3 12.2 11.7 11.4 11.2 10.9 10.9 10.7 10.4 10.2
10.0
9.9
16.7 16.6 12.5 12.0 11.7 11.5 11.2 11.2 11.0 10.7 10.6 10.3
10.2
17.0 16.9 12.8 12.3 12.0 11.8 11.5 11.5 11.3 11.0 10.9 10.6
10.5
17.3 17.2 13.1 12.6 12.3 12.1 11.9 11.8 11.6 11.3 11.2 10.9
10.8
17.6 17.5 13.4 12.9 12.6 12.4 12.2 12.1 11.9 11.7 11.5 11.2
11.1
17.9 17.8 13.7 13.2 12.9 12.7 12.5 12.4 12.2 12.0 11.8 11.5
11.4
18.2 18.1 14.0 13.5 13.2 13.1 12.8 12.7 12.5 12.3 12.1 11.8
11.7
18.5 18.4 14.3 13.8 13.5 13.4 13.1 13.0 12.8 12.6 12.4 12.1
12.0
18.8 18.7 14.6 14.1 13.8 13.7 13.4 13.3 13.2 12.9 12.7 12.4
12.4
19.1 19.0 14.9 14.4 14.1 14.0 13.7 13.6 13.5 13.2 13.0 12.7
12.7
19.4 19.3 15.2 14.7 14.4 14.3 14.0 13.9 13.8 13.5 13.3 13.0 13.0
19.7 19.7 15.5 15.0 14.8 14.6 14.3 14.2 14.1 13.8 13.6 13.3 13.3
20.0 20.0 15.8 15.3 15.1 14.9 14.6 14.5 14.4 14.1 13.9 13.6 13.6
Notes:
1. Eb/No = Es/No - 10 Log (Spectral Efficiency).
2. The required C/N for Short Frames is typically 0.2 to 0.3 dB higher.
3. Shaded areas are high error rate or unstable.