Comtech EF Data SDM-2020 - Manual (Page 31)

SDM-2020 Satellite Demodulator Revision 4
Introduction MN/SDM2020D.IOM
1–5
1.4 Description of Data Interface
Table 1-2 provides a list of the data interface available. Each data interface is a plug-in
module that provides a specific terrestrial connection to the demodulator unit. Where
practical, both the TX (modulator) and RX (demodulator) paths are incorporated into the
data interface. Refer to the applicable chapter for description of the interface module.
Table 1-2. Comtech EF Data Part Numbers for Data Interface Modules
Part Number Description
PL/5805 RS422 Serial/Parallel Data Interface
PL/5806-3 RX only ECL/HSSI Serial Data Interface
PL/5807 ASI/RS422 (Asynchronous Serial Interface/Serial Data Interface
PL/5814 LVDS-DVB Serial/Parallel Data Interface
PL/6168-1 G.703 Data Interface
PL/6175-2 SMPTE 310M Data Interface
PL/8160 ASI/LVDS Interface
The 70/140 MHz IF interface is a plug-in card designed to replace the current L-Band
demodulator RF. It will be plug compatible both physically and electrically with the
current L-Band demodulator. The demodulator board is designed to require minimal
changes to the current SDM-2020 firmware and mechanical assemblies.
1.4.1 Interface/M&C Software Requirements
Note: This section 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 1-3 summarizes the minimum software version
necessary to operate each interface type.
Table 1-3. Minimum Software Revisions
Data Interface Specification P/N Minimum Software Version
RS-422 SP/5805 1.1.1
LVDS SP/5814 1.1.1
ASI/RS-422 SP/5807
1.1.1
ECL/HSSI SP/5806-1/-2 1.1.2
G.703 SP/6168 2.2.1
SMPTE 310M
SP/6175-1 2.2.4
ASI/LVDS SP/8160 4.3.3
CAUTION
To avoid damaging the Demodulator, always disconnect the power before
removing or installing a data interface.