Introduction
SDM-9000 Satellite Modem
1–12
Rev. 4
1.4 BER Performance Specifications
The bit energy-to-noise ratios (E
b
/N
0
) required to achieve 10
-3
to 10
-10
Bit Error Rates
(BERs) are listed in Tables 1-2 through 1-4. The BER performance curves are shown in
the following figures:
Figure
Modulation
1-4
QPSK
1-5
QPSK (with Reed-Solomon)
1-6
8PSK (with Reed-Solomon)
1-7
16QAM (with Reed-Solomon)
1.4.1 Viterbi Decoder BER (QPSK)
The Viterbi specifications for the E
b
/N
0
required to achieve 10
-3
to 10
-8
BER for different
coding configurations are shown in Table 1-2. All values are for operation in QPSK
mode.
Performance measurements are recorded with transmit and receive IF connected
back-to-back through an additive white Gaussian noise channel. Refer to Figure 1-4 for
the Viterbi BER curves.
Table 1-2. Viterbi Decoder BER Data
Specification
BER
1/2 Rate
3/4 Rate
7/8 Rate
10
-3
4.2 dB
5.2 dB
6.4 dB
10
-4
4.8 dB
6.0 dB
7.2 dB
10
-5
5.4 dB
6.7 dB
7.9 dB
10
-6
6.0 dB
7.5 dB
8.6 dB
10
-7
6.6 dB
8.2 dB
9.2 dB
10
-8
7.2 dB
8.8 dB
9.9 dB
Typical
BER
1/2 Rate
3/4 Rate
7/8 Rate
10
-3
3.8 dB
4.8 dB
6.0 dB
10
-4
4.2 dB
5.5 dB
6.6 dB
10
-5
4.9 dB
6.1 dB
7.3 dB
10
-6
5.5 dB
6.7 dB
8.0 dB
10
-7
6.1 dB
7.6 dB
8.6 dB
10
-8
6.7 dB
8.2 dB
9.3 dB
Summary of Contents for SDM-9000
Page 2: ......
Page 5: ...8 Mbit s w IDR Figure 1 7 16QAM BER Performance Curves with Reed Solomon Filename T_ERRATA 3...
Page 8: ......
Page 27: ...SDM 9000 Satellite Modem Introduction Rev 4 1 5 Figure 1 3 SDM 9000 Block Diagram...
Page 42: ...Introduction SDM 9000 Satellite Modem 1 20 Rev 4 This page is intentionally left blank...
Page 64: ...Configuration SDM 9000 Satellite Modem 3 6 Rev 4 JP1 Figure 3 4 Interface PCB AS 3971...
Page 65: ...SDM 9000 Satellite Modem Configuration Rev 4 3 7 Figure 3 5 Interface PCB AS 4477...
Page 66: ...Configuration SDM 9000 Satellite Modem 3 8 Rev 4 JP1 JP6 JP7 Figure 3 6 Interface PCB AS 5618...
Page 70: ...Configuration SDM 9000 Satellite Modem 3 12 Rev 4 Figure 3 7 Nyquist Filter Installation...
Page 83: ...SDM 9000 Satellite Modem Operation Rev 4 4 9 This page is intentionally left blank...
Page 87: ...SDM 9000 Satellite Modem Operation Rev 4 4 13 This page is intentionally left blank...
Page 104: ...SDM 9000 Satellite Modem Operation Rev 4 4 31 This page is intentionally left blank...
Page 107: ...Operation SDM 9000 Satellite Modem 4 34 Rev 4 This page is intentionally left blank...
Page 124: ...SDM 9000 Satellite Modem Operation Rev 4 4 51 Figure 4 17 RF Loopback Figure 4 18 IF Loopback...
Page 150: ...Theory of Operation SDM 9000 Satellite Modem 5 22 Rev 4 Figure 5 6 Interface Block Diagram...
Page 158: ...Theory of Operation SDM 9000 Satellite Modem 5 30 Rev 4 This page is intentionally left blank...
Page 186: ...Maintenance SDM 9000 Satellite Modem 6 28 Rev 4 This page is intentionally left blank...
Page 218: ...Options SDM 9000 Satellite Modem A 32 Rev 4 This page is intentionally left blank...
Page 242: ...Remote Control Operation SDM 9000 Satellite Modem B 24 Rev 4 ref SE_ command...
Page 254: ...Glossary SDM 9000 Satellite Modem g 6 Rev 4 This page is intentionally left blank...
Page 256: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...