Introduction
SDM-2020 Satellite Demodulator
1–4
Rev. 3
Refer to Table 1-1 for the Min/Max data and symbol rates for unframed (187) Mode.
Table 1-1. Unframed (187) Mode
Code Rate
Minimum
Data Rate
(bit/s)
Maximum
Data Rate
(bit/s)
Minimum
Symbol Rate
(sym/s)
Maximum
Symbol Rate
(sym/s)
Remarks
QPSK 1/2
1,375,000
34,375,000
1,500,000
37,500,000
QPSK 2/3
1,833,333
45,000,000
1,500,000
36,818,181
QPSK 3/4
2,062,500
45,000,000
1,500,000
32,727,272
QPSK 5/6
2,291,666
45,000,000
1,500,000
29,454,545
QPSK 7/8
2,406,250
45,000,000
1,500,000
28,051,948
8PSK 2/3
2,750,000
68,750,000
1,500,000
37,500,000
8PSK 5/6
3,437,500
85,937,500
1,500,000
37,500,000
8PSK 8/9
3,666,666
91,666,666
1,500,000
37,500,000
16QAM 3/4
4,125,000
91,666,666
1,500,000
33,333,333
16QAM 7/8
4,812,500
91,666,666
1,500,000
28,571,428
Refer to Table 1-2 for the Min/Max data and symbol rates for the 188 mode.
Table 1-2. 188 Mode
Code Rate
Minimum
Data Rate
(bit/s)
Maximum
Data Rate
(bit/s)
Minimum
Symbol Rate
(sym/s)
Maximum
Symbol Rate
(sym/s)
Remarks
QPSK 1/2
1,382,353
34,558,823
1,500,000
37,500,000
QPSK 2/3
1,843,137
45,000,000
1,500,000
36,622,340
QPSK 3/4
2,073,529
45,000,000
1,500,000
32,553,191
QPSK 5/6
2,303,921
45,000,000
1,500,000
29,297,872
QPSK 7/8
2,419,117
45,000,000
1,500,000
27,902,735
8PSK 2/3
2,764,705
69,117,647
1,500,000
37,500,000
8PSK 5/6
3,455,882
86,397,059
1,500,000
37,500,000
8PSK 8/9
3,686,274
92,156,862
1,500,000
37,500,000
16QAM 3/4
4,147,058
92,156,862
1,500,000
33,333,333
16QAM 7/8
4,838,235
92,156,862
1,500,000
28,571,428
Refer to Table 1-3 for the Min/Max data and symbol rates for the 204 mode.
Table 1-3. 204 Mode
Table 4
Code Rate
Minimum
Data Rate
(bit/s)
Maximum
Data Rate
(bit/s)
Minimum
Symbol Rate
(sym/s)
Maximum
Symbol Rate
(sym/s)
Remarks
QPSK 1/2
1,500,000
37,500,000
1,500,000
37,500,000
QPSK 2/3
2,000,000
45,000,000
1,500,000
33,750,000
QPSK 3/4
2,250,000
45,000,000
1,500,000
30,000,000
QPSK 5/6
2,500,000
45,000,000
1,500,000
27,000,000
QPSK 7/8
2,625,000
45,000,000
1,500,000
25,714,285
8PSK 2/3
3,000,000
75,000,000
1,500,000
37,500,000
8PSK 5/6
3,750,000
93,750,000
1,500,000
37,500,000
8PSK 8/9
4,000,000
100,000,000
1,500,000
37,500,000
16QAM 3/4
4,500,000
100,000,000
1,500,000
33,333,333
16QAM 7/8
5,250,000
100,000,000
1,500,000
28,571,428
Notes:
1.
Data and symbol rates are effective on hardware shipped through December 1998.
Summary of Contents for SDM-2020
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Page 212: ...SDM 2020 Satellite Demodulator Glossary Rev 2 g 3 W Watt...
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