Quantum and Evolution Series Installation and Operating Handbook
8-33
Tables to Convert (C+N)/N to Eb/No
N
N
+
C
0
N
E
=
N
C
0
S
0
N
E
0
t
0
N
E
0
Dec
0
N
E
0
b
0
4.6
4.8
2.75
3.05
Adjust for
modulation:
BPSK: -0dB
QPSK: -3.0dB
OQPSK: -3.0dB
8PSK: -4.77dB
Adjust for
FEC Rate:
1/2 Rate: +3.0dB
3/4 Rate:
+1.25dB
7/8 Rate:
+0.58dB
2/3 Rate:
+1.76dB
Adjust for
RS Codec:
(n,k,t)=
(126,112,7): +0.51dB
(219,201,9): +0.37dB
(225,205,10): +0.40dB
5.0
5.2
5.4
5.6
5.8
3.35
3.64
3.92
4.20
4.47
6.0
6.2
6.4
6.6
6.8
4.74
5.01
5.27
5.53
5.78
7.0
7.2
7.4
7.6
7.8
6.03
6.28
6.53
6.77
7.01
8.0
8.2
8.4
8.6
8.8
7.25
7.49
7.72
7.95
8.19
9.0
9.2
9.4
9.6
9.8
8.42
8.64
8.87
9.10
9.32
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
9.54
10.09
10.64
11.18
11.72
12.25
12.78
13.30
13.82
14.34
15.0 14.86
