SDM-9000 Satellite Modem
Introduction
Rev. 4
1–3
The modem provides high performance with:
•
Narrow occupied bandwidth
•
Automatic signal acquisition
•
High flexibility
•
Extensive online monitoring circuits
The modem interfaces between Single Channel Per Carrier (SCPC) fixed-rate terminal
equipment that operates within the following specifications:
•
Data rate of 6.0 to 51.84 Mbit/s
•
Symbol rate of 1.7 to 37.5 Ms/s
•
Configured to add overhead and framing to the data
The 51.84 Mbit/s data rate is defined by STS-1 (Sonnet specifications).
1.1.1 Nyquist Filter Printed Circuit Boards
The modem features include a Nyquist filter Printed Circuit Board (PCB) for enabling
the user to change data rates at the modulator or demodulator. The modem supports up to
four channels at the following data rate and modulation type combinations:
Data Rates
6.0 to 51.84 Mbit/s
Comments
Modulation Types
QPSK 1/2 Rate
QPSK 3/4 Rate
QPSK 7/8 Rate
8PSK 2/3 Rate
8PSK 5/6 Rate
16QAM 3/4 Rate
16QAM 7/8 Rate
Optional
Optional
Optional
Optional
Data rate information is automatically recovered from the filter module upon system
power-up or initialization. The installed interface, modulator, and demodulator must be
compatible with the installed filters for proper modem operation. The filters can be
installed in the factory or field.
Refer to Chapter 3 for information about modem configuration.
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...