Comtech EF Data CDM-710G User Manual
Page 240
CDM-710G High-Speed Satellite Modem
Revision 1
Eb/No Measurement
MN-CDM710G
B–4
Table B-2. CDM-710G 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)
Notes:
1. Eb/No = Es/No – 10 Log (Spectral Efficiency).
2. The Required C/N for QEF with FECFrame = 16,200 bits is typically 0.2 to 0.3 dB higher.
3. Shaded values are high error rate or unusable.
16APSK
32APSK
2.637201
2.966728
3.165623
3.300184
3.523143
3.567342
3.703295
3.951571
4.119540
4.397854
4.453027
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
9.0
8.4
4.2
3.7
3.4
3.2
2.9
2.9
2.7
2.4
2.3
2.0
1.9
9.5
9.0
4.8
4.3
4.0
3.8
3.5
3.5
3.3
3.0
2.8
2.6
2.5
10.0
9.5
5.3
4.8
4.5
4.4
4.1
4.0
3.9
3.6
3.4
3.1
3.1
10.5
10.1
5.9
5.4
5.1
4.9
4.6
4.6
4.4
4.1
3.9
3.7
3.6
11.0
10.6
6.4
5.9
5.6
5.5
5.2
5.1
5.0
4.7
4.5
4.2
4.2
11.5
11.2
7.0
6.5
6.2
6.0
5.7
5.7
5.5
5.2
5.0
4.7
4.7
12.0
11.7
7.5
7.0
6.7
6.5
6.2
6.2
6.0
5.7
5.6
5.3
5.2
12.5
12.2
8.0
7.5
7.2
7.1
6.8
6.7
6.6
6.3
6.1
5.8
5.8
13.0
12.8
8.6
8.1
7.8
7.6
7.3
7.3
7.1
6.8
6.6
6.3
6.3
13.5
13.3
9.1
8.6
8.3
8.1
7.8
7.8
7.6
7.3
7.2
6.9
6.8
14.0
13.8
9.6
9.1
8.8
8.6
8.4
8.3
8.1
7.9
7.7
7.4
7.3
14.5
14.3
10.1
9.6
9.3
9.2
8.9
8.8
8.7
8.4
8.2
7.9
7.9
15.0
14.9
10.6
10.1
9.9
9.7
9.4
9.3
9.2
8.9
8.7
8.4
8.4
15.5
15.4
11.2
10.7
10.4
10.2
9.9
9.9
9.7
9.4
9.2
8.9
8.9
16.0
15.9
11.7
11.2
10.9
10.7
10.4
10.4
10.2
9.9
9.7
9.5
9.4
16.5
16.4
12.2
11.7
11.4
11.2
10.9
10.9
10.7
10.4
10.3
10.0
9.9
17.0
16.9
12.7
12.2
11.9
11.7
11.4
11.4
11.2
10.9
10.8
10.5
10.4
17.5
17.4
13.2
12.7
12.4
12.2
12.0
11.9
11.7
11.5
11.3
11.0
10.9
18.0
17.9
13.7
13.2
12.9
12.7
12.5
12.4
12.2
12.0
11.8
11.5
11.4
18.5
18.4
14.2
13.7
13.4
13.3
13.0
12.9
12.8
12.5
12.3
12.0
12.0
19.0
18.9
14.7
14.2
13.9
13.8
13.5
13.4
13.3
13.0
12.8
12.5
12.5
19.5
19.5
15.2
14.7
14.4
14.3
14.0
13.9
13.8
13.5
13.3
13.0
13.0
20.0
20.0
15.7
15.2
15.0
14.8
14.5
14.4
14.3
14.0
13.8
13.5
13.5
20.5
20.5
16.2
15.7
15.5
15.3
15.0
14.9
14.8
14.5
14.3
14.0
14.0
21.0
21.0
16.8
16.2
16.0
15.8
15.5
15.4
15.3
15.0
14.8
14.5
14.5
21.5
21.5
17.3
16.7
16.5
16.3
16.0
15.9
15.8
15.5
15.3
15.0
15.0
22.0
22.0
17.8
17.2
17.0
16.8
16.5
16.4
16.3
16.0
15.8
15.5
15.5
22.5
22.5
18.3
17.8
17.5
17.3
17.0
17.0
16.8
16.5
16.3
16.0
16.0
23.0
23.0
18.8
18.3
18.0
17.8
17.5
17.5
17.3
17.0
16.8
16.5
16.5
23.5
23.5
19.3
18.8
18.5
18.3
18.0
18.0
17.8
17.5
17.3
17.0
17.0
24.0
24.0
19.8
19.3
19.0
18.8
18.5
18.5
18.3
18.0
17.8
17.6
17.5
24.5
24.5
20.3
19.8
19.5
19.3
19.0
19.0
18.8
18.5
18.3
18.1
18.0
25.0
25.0
20.8
20.3
20.0
19.8
19.5
19.5
19.3
19.0
18.8
18.6
18.5
25.5
25.5
21.3
20.8
20.5
20.3
20.0
20.0
19.8
19.5
19.3
19.1
19.0
26.0
26.0
21.8
21.3
21.0
20.8
20.5
20.5
20.3
20.0
19.8
19.6
19.5
Spectral Efficiency
Code Rate