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Data Interfaces
A.1.1
Interface/M&C Software Requirements
Note: This does not apply to SDM-2020 Demodulator incorporating PCB , AS/7733.
As additional data interfaces are introduced, the software is revised to support the
operation of each interface. Table A-1 summarizes the minimum software version
necessary to operate each interface type.
Data Interface
RS-422
LVDS
ASI/RS-422
ECL/HSSI
G.703
SMPTE 310M
ASI/LVDS
CAUTION
A.1.2
Transmit/Receive Data
The data format for the transmit (
There are three general modes of operation that are described in Section 3.1:
•
•
•
When None (187) mode is selected, no frame structure is expected, while the 188 and 204
modes will synchronize to standard MPEG-2 transport frames. Other supported data
formats are referenced in the appropriate section of this appendix, but the data from other
frame formats is extracted and converted to one of the three modes of operation.
Figure A-1 and depict the 204-byte packetization for byte parallel and byte serial formats,
showing all possible data fields and timing signal relationships. The 188 byte and no
framing formats are subsets of the 204 byte format.
A–2
Table A-1. Minimum Software Revisions
Specification P/N
SP/5805
SP/5814
SP/5807
SP/5806-1/-2
SP/6168
SP/6175-1
SP/8160
To avoid damaging the Demodulator, always disconnect the power before
removing or installing a data interface.
None (187)
188
204
Minimum Software Version
) and receive (RX) data interfaces are the same.
TX
SDM-2020 Satellite Demodulator
1.1.1
1.1.1
1.1.1
1.1.2
2.2.1
2.2.4
4.3.3
Rev.3
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