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Maintenance
6–6
Table 6-2. Conversion to S/N and E
(dB)
Code Rate 2/3
(S+N)/N
S/N
4.0
1.8
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
/N
Chart (8PSK)
b
0
Code Rate 5/6
E
/N
S/N
b
0
-1.2
1.8
-0.4
2.6
0.3
3.3
1.1
4.1
1.7
4.7
2.4
5.4
3.0
6.0
3.6
6.6
4.2
7.3
4.8
7.8
5.4
8.4
6.0
9.0
6.5
9.5
7.1
10.1
7.6
10.6
8.2
11.2
8.7
11.7
9.2
12.2
9.8
12.8
10.3
13.3
10.8
13.8
11.3
14.3
11.9
14.9
12.4
15.4
12.9
15.9
13.4
16.4
13.9
16.9
14.4
17.4
14.9
17.9
15.4
18.4
15.9
18.9
16.4
19.5
16.9
20.0
SDM-9000 Satellite Modem
E
/N
b
0
-2.2
-1.4
-0.6
0.1
0.8
1.4
2.1
2.7
3.3
3.9
4.4
5.0
5.6
6.1
6.7
7.2
7.7
8.3
8.8
9.3
9.8
10.4
10.9
11.4
11.9
12.4
12.9
13.4
14.0
14.5
15.0
15.5
16.0
Rev. 4
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