Comtech EF Data SDM-9000 User Manual
Page 164
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Maintenance
SDM-9000 Satellite Modem
6–6
Rev. 4
Table 6-2. Conversion to S/N and E
b
/N
0
Chart (8PSK)
(dB)
Code Rate 2/3
Code Rate 5/6
(S+N)/N
S/N
E
b
/N
0
S/N
E
b
/N
0
4.0
1.8
-1.2
1.8
-2.2
4.5
2.6
-0.4
2.6
-1.4
5.0
3.3
0.3
3.3
-0.6
5.5
4.1
1.1
4.1
0.1
6.0
4.7
1.7
4.7
0.8
6.5
5.4
2.4
5.4
1.4
7.0
6.0
3.0
6.0
2.1
7.5
6.6
3.6
6.6
2.7
8.0
7.3
4.2
7.3
3.3
8.5
7.8
4.8
7.8
3.9
9.0
8.4
5.4
8.4
4.4
9.5
9.0
6.0
9.0
5.0
10.0
9.5
6.5
9.5
5.6
10.5
10.1
7.1
10.1
6.1
11.0
10.6
7.6
10.6
6.7
11.5
11.2
8.2
11.2
7.2
12.0
11.7
8.7
11.7
7.7
12.5
12.2
9.2
12.2
8.3
13.0
12.8
9.8
12.8
8.8
13.5
13.3
10.3
13.3
9.3
14.0
13.8
10.8
13.8
9.8
14.5
14.3
11.3
14.3
10.4
15.0
14.9
11.9
14.9
10.9
15.5
15.4
12.4
15.4
11.4
16.0
15.9
12.9
15.9
11.9
16.5
16.4
13.4
16.4
12.4
17.0
16.9
13.9
16.9
12.9
17.5
17.4
14.4
17.4
13.4
18.0
17.9
14.9
17.9
14.0
18.5
18.4
15.4
18.4
14.5
19.0
18.9
15.9
18.9
15.0
19.5
19.5
16.4
19.5
15.5
20.0
20.0
16.9
20.0
16.0
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