Comtech EF Data SDM-9000, Installation And Operation Manual

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Introduction SDM-9000 Satellite Modem
1–6 Rev. 4
1.1.3 Options
1.1.3.1 Reed-Solomon Codec
The Reed-Solomon Codec works in conjunction with the Viterbi decoder, and includes
additional framing, interleaving, and Codec.
This option can be factory or user installed. Refer to the following table for modem
compatibility requirements.
Interface PCB Type 2 or 3 (or greater)
AS/3971-2
AS/3971-3
Display/M&C PCB AS/2305 Rev. C4 (or greater)
Modulator PCB AS/3969
Demodulator PCB AS/3970
Reed-Solomon Codec PCB AS/4080
Reed-Solomon Daughter
Board (DVB Standard) AS/4524
Refer to Appendix A for more information.
1.1.3.2 8PSK/16QAM
The 8PSK modulation type is a PSK encoding method for providing a modulated carrier
at 6.0 to 51.84 Mbit/s by pragmatic trellis encoding at 2/3 and 5/6 code rates. This option
is installed at the factory.
The 16QAM is an encoding method for providing a modulated carrier at 6.0 to
51.84 Mbit/s in 3/4 and 7/8 rates.
Interface PCB Type 2 and 3 (or greater)
AS/3971-2
AS/3971-3
Display/M&C PCB AS/2305 Rev. C4 (or greater)
Modulator PCB AS/3969-1, -2, -5, and -6
Demodulator PCB AS/3970-1 and -2
Reed-Solomon Codec PCB AS/4080
Note:
The Reed
-
Solomon option is required for 8PSK/16QAM operation.