Comtech EF Data SMS-301 - Manual (Page 108)

SDM-2020 System Installation SMS-301 Redundancy Switch
C–6 Rev. 3
C.1.3 Connect to SDM-2020 Sateliite Modulator with EIA-422 DVB TX
Interface
C.1.3.1 Description
The SMS-301 data interface is a plug-in module that interfaces with the SDM-2020
Satellite Modulator. The maximum data rate is 18 Mbit/s for serial data.
The SDM-2020 Modulator configured with the EIA-422 data interface is identified as
follows:
•
Parallel Connector (J3) is used for DVB EIA-422 either parallel or serial data.
•
Serial connector (J3) is for (EIA-530) serial differential data operation.
Note: SDM-2020 Modulator with ASI/EIA-422 data interface can be configured using
the same instructions as the EIA-422 configuration.
The interface operates to the specifications described in Table C-1.
Table C-3. EIA-422/EIA-530 Specifications
General Specification
Interface Type EIA-422/EIA-530 Synchronous (Serial)
Data Rate 1.5 to 18 Mbit/s (Serial)
Connectors 37-pin D female for serial data
Electrical Properties Per EIA-422
Signal Types SD, ST, TT, RS, CS, RD, RT, RR, (CD)