Table 1-1. Unframed (187) Mode; Table 1-2. 188 Mode; Table 1-3. 204 Mode - Comtech EF Data SDM-2020 Installation And Operation Manual

Introduction
Refer to Table 1-1 for the Min/Max data and symbol rates for unframed (187) Mode.
Code Rate
QPSK 1/2
QPSK 2/3
QPSK 3/4
QPSK 5/6
QPSK 7/8
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM 3/4
16QAM 7/8
Refer to Table 1-2 for the Min/Max data and symbol rates for the 188 mode.
Code Rate
QPSK 1/2
QPSK 2/3
QPSK 3/4
QPSK 5/6
QPSK 7/8
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM 3/4
16QAM 7/8
Refer to Table 1-3 for the Min/Max data and symbol rates for the 204 mode.
Code Rate
QPSK 1/2
QPSK 2/3
QPSK 3/4
QPSK 5/6
QPSK 7/8
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM 3/4
16QAM 7/8
Notes:
1. Data and symbol rates are effective on hardware shipped through December 1998.
1–4

Table 1-1. Unframed (187) Mode

Minimum Maximum
Data Rate Data Rate
(bit/s) (bit/s)
1,375,000 34,375,000
1,833,333 45,000,000
2,062,500 45,000,000
2,291,666 45,000,000
2,406,250 45,000,000
2,750,000 68,750,000
3,437,500 85,937,500
3,666,666 91,666,666
4,125,000 91,666,666
4,812,500 91,666,666

Table 1-2. 188 Mode

Minimum Maximum
Data Rate Data Rate
(bit/s) (bit/s)
1,382,353 34,558,823
1,843,137 45,000,000
2,073,529 45,000,000
2,303,921 45,000,000
2,419,117 45,000,000
2,764,705 69,117,647
3,455,882 86,397,059
3,686,274 92,156,862
4,147,058 92,156,862
4,838,235 92,156,862

Table 1-3. 204 Mode

Table 4
Minimum Maximum
Data Rate Data Rate
(bit/s) (bit/s)
1,500,000 37,500,000
2,000,000 45,000,000
2,250,000 45,000,000
2,500,000 45,000,000
2,625,000 45,000,000
3,000,000 75,000,000
3,750,000 93,750,000
4,000,000 100,000,000
4,500,000 100,000,000
5,250,000 100,000,000
SDM-2020 Satellite Demodulator
Minimum Maximum
Symbol Rate Symbol Rate
(sym/s) (sym/s)
1,500,000 37,500,000
1,500,000 36,818,181
1,500,000 32,727,272
1,500,000 29,454,545
1,500,000 28,051,948
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 33,333,333
1,500,000 28,571,428
Minimum Maximum
Symbol Rate Symbol Rate
(sym/s) (sym/s)
1,500,000 37,500,000
1,500,000 36,622,340
1,500,000 32,553,191
1,500,000 29,297,872
1,500,000 27,902,735
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 33,333,333
1,500,000 28,571,428
Minimum Maximum
Symbol Rate Symbol Rate
(sym/s) (sym/s)
1,500,000 37,500,000
1,500,000 33,750,000
1,500,000 30,000,000
1,500,000 27,000,000
1,500,000 25,714,285
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 37,500,000
1,500,000 33,333,333
1,500,000 28,571,428
Remarks
Remarks
Remarks
Rev. 3