ProTelevision PT 5780, Инструкция по эксплуатации

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PT 5780 DVB-T Modulator ProTelevision Technologies Introduction and Applications
Instruction Manual Revision 3.11
2-5
In Table 2-2 the maximum useful bit rates are indicated for all valid transmission modes in a
7 MHz system.
In Table 2-3 the maximum useful bit rates are indicated for all valid transmission modes in a
6 MHz system.
With 204 byte packet input the maximum bit rates are increased accordingly.
Modulation Code rate Guard interval
1/4 1/8 1/16 1/32
½ 4,354 4,838 5,123 5,278
2/3 5,806 6,451 6,830 7,037
QPSK ¾ 6,532 7,257 7,684 7,917
5/6 7,257 8,064 8,538 8,797
7/8 7,620 8,467 8,965 9,237
½ 8,709 9,676 10,246 10,556
2/3 11,612 12,902 13,661 14,075
16-QAM ¾ 13,063 14,515 15,369 15,834
5/6 14,515 16,127 17,076 17,594
7/8 15,240 16,934 17,930 18,473
½ 13,063 14,515 15,369 15,834
2/3 17,418 19,353 20,491 21,112
64-QAM ¾ 19,595 21,772 23,053 23,751
5/6 21,772 24,191 25,614 26,390
7/8 22,861 25,401 26,895 27,710
Table 2-2 Available data rate for 7MHz DVB-T
Modulation Code rate Guard interval
1/4 1/8 1/16 1/32
½ 3,732 4,147 4,391 4,524
2/3 4,976 5,529 5,855 6,032
QPSK ¾ 5,599 6,221 6,587 6,786
5/6 6,221 6,912 7,318 7,540
7/8 6,532 7,257 7,684 7,917
½ 7,465 8,294 8,782 9,048
2/3 9,953 11,059 11,709 12,064
16-QAM ¾ 11,197 12,441 13,173 13,572
5/6 12,441 13,824 14,637 15,080
7/8 13,063 14,515 15,369 15,834
½ 11,197 12,441 13,173 13,572
2/3 14,929 16,588 17,564 18,096
64-QAM ¾ 16,796 18,662 19,760 20,358
5/6 18,662 20,735 21,955 22,620
7/8 19,595 21,772 23,053 23,751
Table 2-3 Available data rate for 6MHz DVB-T