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myScatterBox.com
Trouble Shooting
MPEG Code Rates
The table below shows the code rates produced by different combinations of the constellation,
FEC, Bandwidth and Guard Interval. DVB equipment requires a code rate of at least 22MHz so
for the MOD200 to be discovered on a TV it must be outputting a codes rate of at least 22MHz:
Modulation
Constellation
Code
Rate
(FEC)
6MHz Bandwidth
7MHz Bandwidth
8MHz Bandwidth
Guard Interval
Guard Interval
Guard Interval
1/4
1/8
1/16 1/32
1/4
1/8
1/16 1/32
1/4
1/8
1/16 1/32
QPSK
1/2
-
-
-
-
-
-
-
-
-
-
-
6.03
2/3
-
-
-
6.03
5.80
6.45
6.83
7.03
6.64
7.37
7.81
8.04
3/4
-
6.22
6.58
6.78
6.53
7.25
7.68
7.91
7.46
8.29
8.78
9.05
5/6
6.22
6.91
7.31
7.54
7.25
8.06
8.53
8.79
8.29
9.22
9.76 10.05
7/8
6.53
7.25
7.68
7.91
7.62
8.46
8.96
9.23
8.71
9.68 10.25 10.56
16 QAM
1/2
7.46
8.29
8.78
9.04
8.70
9.67 10.24 10.55 9.95 11.06 11.71 12.06
2/3
9.95 11.05 11.70 12.06 11.61 12.90 13.66 14.07 13.27 14.75 15.61 16.09
3/4
11.19 12.44 13.17 13.57 13.06 14.51 15.36 15.83 14.93 16.59 17.56 18.10
5/6
12.44 13.82 14.63 15.08 14.51 16.12 17.07 17.59 16.59 18.43 19.52 20.11
7/8
13.06 14.51 15.36 15.83 15.24 16.93 17.93 18.47 17.42 19.35 20.49 21.11
64 QAM
1/2
11.19 12.44 13.17 13.57 13.06 14.51 15.36 15.83 14.93 16.59 17.56 18.10
2/3
14.92 16.58 17.56 18.09 17.41 19.35 20.49 21.11 19.91 22.12 23.42 24.13
3/4
16.79 18.66 19.76 20.35 19.59 21.77 23.05 23.75 22.39 24.88 26.35 27.14
5/6
18.66 20.73 21.95 22.62 21.77 24.19 25.61 26.39 24.88 27.65 29.27 30.16
7/8
19.59 21.77 23.05 23.75 22.86 25.40 26.89 27.71 26.13 29.03 30.74 31.67
