Comtech EF Data SDM-9000 User Manual
Page 165
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SDM-9000 Satellite Modem
Maintenance
Rev. 4
6–7
Table 6-3. Conversion to S/N and E
b
/N
0
Chart (16QAM)
(dB)
Code Rate 3/4
Code Rate 7/8
(S+N)/N
S/N
E
b
/N
0
S/N
E
b
/N
0
4.0
1.8
-3.0
1.8
-3.6
4.5
2.6
-2.2
2.6
-2.8
5.0
3.3
-1.4
3.3
-2.1
5.5
4.1
-0.7
4.1
-1.4
6.0
4.7
-0.0
4.7
-0.7
6.5
5.4
0.6
5.4
-0.0
7.0
6.0
1.3
6.0
0.6
7.5
6.6
1.9
6.6
1.2
8.0
7.3
2.5
7.3
1.8
8.5
7.8
3.1
7.8
2.4
9.0
8.4
3.6
8.4
3.0
9.5
9.0
4.2
9.0
3.5
10.0
9.5
4.8
9.5
4.1
10.5
10.1
5.3
10.1
4.7
11.0
10.6
5.9
10.6
5.2
11.5
11.2
6.4
11.2
5.7
12.0
11.7
6.9
11.7
6.3
12.5
12.2
7.5
12.2
6.8
13.0
12.8
8.0
12.8
7.3
13.5
13.3
8.5
13.3
7.9
14.0
13.8
9.1
13.8
8.4
14.5
14.3
9.6
14.3
8.9
15.0
14.9
10.1
14.9
9.4
15.5
15.4
10.6
15.4
9.9
16.0
15.9
11.1
15.9
10.4
16.5
16.4
11.6
16.4
11.0
17.0
16.9
12.1
16.9
11.5
17.5
17.4
12.7
17.4
12.0
18.0
17.9
13.2
17.9
12.5
18.5
18.4
13.7
18.4
13.0
19.0
18.9
14.2
18.9
13.5
19.5
19.5
14.7
19.5
14.0
20.0
20.0
15.2
20.0
14.5
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