Comtech EF Data CDM-710G User Manual
Page 239
CDM-710G High-Speed Satellite Modem
Revision 1
Eb/No Measurement
MN-CDM710G
B–3
Table B-1. CDM-710G 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)
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.
QPSK
8PSK
0.490243
0.656448
0.789412
0.988858
1.188304
1.322253
1.487473
1.587196
1.654663
1.766451
1.788612
1.779991
1.980636
2.228124
2.478562
2.646012
2.679207
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
2.0
-2.3
0.8
-0.5
-1.3
-2.3
-3.1
-3.5
-4.1
-4.3
-4.5
-4.8
-4.9
-4.8
-5.3
-5.8
-6.3
-6.6
-6.6
2.5
-1.1
2.0
0.7
-0.1
-1.0
-1.8
-2.3
-2.8
-3.1
-3.3
-3.6
-3.6
-3.6
-4.1
-4.6
-5.0
-5.3
-5.4
3.0
0.0
3.1
1.8
1.0
0.0
-0.8
-1.2
-1.7
-2.0
-2.2
-2.5
-2.5
-2.5
-3.0
-3.5
-4.0
-4.2
-4.3
3.5
0.9
4.0
2.8
2.0
1.0
0.2
-0.3
-0.8
-1.1
-1.3
-1.5
-1.6
-1.6
-2.0
-2.5
-3.0
-3.3
-3.4
4.0
1.8
4.9
3.6
2.8
1.8
1.0
0.6
0.1
-0.2
-0.4
-0.7
-0.7
-0.7
-1.2
-1.7
-2.1
-2.4
-2.5
4.5
2.6
5.7
4.4
3.6
2.6
1.8
1.4
0.9
0.6
0.4
0.1
0.1
0.1
-0.4
-0.9
-1.3
-1.6
-1.7
5.0
3.3
6.4
5.2
4.4
3.4
2.6
2.1
1.6
1.3
1.2
0.9
0.8
0.8
0.4
-0.1
-0.6
-0.9
-0.9
5.5
4.1
7.2
5.9
5.1
4.1
3.3
2.8
2.3
2.1
1.9
1.6
1.5
1.6
1.1
0.6
0.1
-0.2
-0.2
6.0
4.7
7.8
6.6
5.8
4.8
4.0
3.5
3.0
2.7
2.6
2.3
2.2
2.2
1.8
1.3
0.8
0.5
0.5
6.5
5.4
8.5
7.2
6.4
5.4
4.7
4.2
3.7
3.4
3.2
2.9
2.9
2.9
2.4
1.9
1.5
1.2
1.1
7.0
6.0
9.1
7.9
7.1
6.1
5.3
4.8
4.3
4.0
3.8
3.6
3.5
3.5
3.1
2.6
2.1
1.8
1.8
7.5
6.6
9.7
8.5
7.7
6.7
5.9
5.4
4.9
4.6
4.5
4.2
4.1
4.1
3.7
3.2
2.7
2.4
2.4
8.0
7.3
10.3
9.1
8.3
7.3
6.5
6.0
5.5
5.2
5.1
4.8
4.7
4.7
4.3
3.8
3.3
3.0
3.0
8.5
7.8
10.9
9.7
8.9
7.9
7.1
6.6
6.1
5.8
5.7
5.4
5.3
5.3
4.9
4.4
3.9
3.6
3.6
9.0
8.4
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
9.5
9.0
12.1
10.8
10.0
9.0
8.2
7.8
7.3
7.0
6.8
6.5
6.5
6.5
6.0
5.5
5.0
4.8
4.7
10.0
9.5
12.6
11.4
10.6
9.6
8.8
8.3
7.8
7.5
7.4
7.1
7.0
7.0
6.6
6.1
5.6
5.3
5.3
10.5
10.1
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
6.2
5.9
5.8
11.0
10.6
13.7
12.5
11.7
10.7
9.9
9.4
8.9
8.6
8.5
8.2
8.1
8.1
7.7
7.2
6.7
6.4
6.4
11.5
11.2
14.3
13.0
12.2
11.2
10.4
10.0
9.5
9.2
9.0
8.7
8.7
8.7
8.2
7.7
7.2
7.0
6.9
12.0
11.7
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
12.5
12.2
15.3
14.1
13.3
12.3
11.5
11.0
10.5
10.2
10.1
9.8
9.7
9.7
9.3
8.8
8.3
8.0
8.0
13.0
12.8
15.9
14.6
13.8
12.8
12.0
11.6
11.1
10.8
10.6
10.3
10.3
10.3
9.8
9.3
8.8
8.6
8.5
13.5
13.3
16.4
15.1
14.3
13.4
12.6
12.1
11.6
11.3
11.1
10.8
10.8
10.8
10.3
9.8
9.4
9.1
9.0
14.0
13.8
16.9
15.7
14.9
13.9
13.1
12.6
12.1
11.8
11.6
11.4
11.3
11.3
10.9
10.3
9.9
9.6
9.5
14.5
14.3
17.4
16.2
15.4
14.4
13.6
13.1
12.6
12.3
12.2
11.9
11.8
11.8
11.4
10.9
10.4
10.1
10.1
15.0
14.9
18.0
16.7
15.9
14.9
14.1
13.6
13.1
12.9
12.7
12.4
12.3
12.4
11.9
11.4
10.9
10.6
10.6
15.5
15.4
18.5
17.2
16.4
15.4
14.6
14.2
13.7
13.4
13.2
12.9
12.9
12.9
12.4
11.9
11.4
11.1
11.1
16.0
15.9
19.0
17.7
16.9
15.9
15.1
14.7
14.2
13.9
13.7
13.4
13.4
13.4
12.9
12.4
11.9
11.7
11.6
16.5
16.4
19.5
18.2
17.4
16.5
15.7
15.2
14.7
14.4
14.2
13.9
13.9
13.9
13.4
12.9
12.5
12.2
12.1
17.0
16.9
20.0
18.7
17.9
17.0
16.2
15.7
15.2
14.9
14.7
14.4
14.4
14.4
13.9
13.4
13.0
12.7
12.6
17.5
17.4
20.5
19.3
18.4
17.5
16.7
16.2
15.7
15.4
15.2
15.0
14.9
14.9
14.5
13.9
13.5
13.2
13.1
18.0
17.9
21.0
19.8
19.0
18.0
17.2
16.7
16.2
15.9
15.7
15.5
15.4
15.4
15.0
14.5
14.0
13.7
13.7
18.5
18.4
21.5
20.3
19.5
18.5
17.7
17.2
16.7
16.4
16.3
16.0
15.9
15.9
15.5
15.0
14.5
14.2
14.2
19.0
18.9
22.0
20.8
20.0
19.0
18.2
17.7
17.2
16.9
16.8
16.5
16.4
16.4
16.0
15.5
15.0
14.7
14.7
Spectral Efficiency
Code Rate