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Comtech EF Data CDM-700 Installation And Operation Manual page 253

High speed satellite modem
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CDM-700 High Speed Satellite Modem
Eb/No Measurement
(Co+No)/No C/N = Es/No
4.5
2.6
5.0
3.3
5.5
4.1
6.0
4.7
6.5
5.4
7.0
6.0
7.5
6.6
8.0
7.3
8.5
7.8
9.0
8.4
9.5
9.0
10.0
9.5
10.5
10.1
11.0
10.6
11.5
11.2
12.0
11.7
12.5
12.2
13.0
12.8
13.5
13.3
14.0
13.8
14.5
14.3
15.0
14.9
15.5
15.4
16.0
15.9
16.5
16.4
17.0
16.9
17.5
17.4
18.0
17.9
18.5
18.4
19.0
18.9
19.5
19.5
20.0
20.0
20.5
20.5
21.0
21.0
21.5
21.5
22.0
22.0
Note:
1.
Includes 2.5% Data Rate overhead (+0.107 db). Rate 7/8 is 20/23 actual (+0.03 dB).
2.
Shaded are high error rate or unusable.
CDM-700 Co+No/No to C/N (Es/No) and Eb/No (dB)
QPSK
3/4
7/8
3/4
E
/N
E
/N
E
b
0
b
0
b
0.9
0.3
-0.8
1.7
1.1
-0.1
2.4
1.8
0.6
3.1
2.4
1.3
3.7
3.1
2.0
4.4
3.7
2.6
5.0
4.4
3.2
5.6
5.0
3.8
6.2
5.5
4.4
6.8
6.1
5.0
7.3
6.7
5.6
7.9
7.2
6.1
8.4
7.8
6.7
9.0
8.3
7.2
9.5
8.9
7.8
10.1
9.4
8.3
10.6
10.0
8.8
11.1
10.5
9.4
11.6
11.0
9.9
12.2
11.5
10.4
12.7
12.0
10.9
13.2
12.6
11.4
13.7
13.1
12.0
14.2
13.6
12.5
14.7
14.1
13.0
15.3
14.6
13.5
15.8
15.1
14.0
16.3
15.6
14.5
16.8
16.1
15.0
17.3
16.6
15.5
17.8
17.2
16.0
18.3
17.7
16.5
18.8
18.2
17.0
19.3
18.7
17.6
19.8
19.2
18.1
20.3
19.7
18.6
Code Rate
8-PSK
7/8
3/4
/N
E
/N
E
/N
0
b
0
b
-1.5
-2.1
-0.7
-1.3
0.0
-0.6
0.7
0.1
1.3
0.7
2.0
1.4
2.6
2.0
3.2
2.6
3.8
3.2
4.4
3.8
4.9
4.3
5.5
4.9
6.0
5.4
6.6
6.0
7.1
6.5
7.7
7.1
8.2
7.6
8.7
8.1
9.2
8.6
9.8
9.2
10.3
9.7
10.8
10.2
11.3
10.7
11.8
11.2
12.3
11.7
12.9
12.2
13.4
12.8
13.9
13.3
14.4
13.8
14.9
14.3
15.4
14.8
15.9
15.3
16.4
15.8
16.9
16.3
17.4
16.8
17.9
17.3
F–3
Revision 5
MN/CDM700.IOM
16-QAM
64-QAM
7/8
3/4
E
/N
E
/N
0
b
0
b
0
-2.7
-3.8
-2.0
-3.1
-1.2
-2.4
-0.6
-1.7
0.1
-1.0
0.7
-0.4
1.3
0.2
1.9
0.8
2.5
1.4
3.1
2.0
3.7
2.6
4.2
3.1
4.8
3.7
5.3
4.2
5.9
4.8
6.4
5.3
6.9
5.8
7.5
6.4
8.0
6.9
8.5
7.4
9.0
7.9
9.6
8.4
10.1
9.0
10.6
9.5
11.1
10.0
11.6
10.5
12.1
11.0
12.6
11.5
13.1
12.0
13.6
12.5
14.1
13.0
14.6
13.5
15.2
14.0
15.7
14.5
16.2
15.0
16.7
15.5
7/8
E
/N
b
0
-4.5
-3.7
-3.0
-2.3
-1.7
-1.0
-0.4
0.2
0.8
1.3
1.9
2.5
3.0
3.6
4.1
4.6
5.2
5.7
6.2
6.8
7.3
7.8
8.3
8.8
9.3
9.8
10.4
10.9
11.4
11.9
12.4
12.9
13.4
13.9
14.4
14.9

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