Comtech EF Data SMS-301 - Manual (Page 103)

Rev. 3 C–1
C
Appendix C.
SDM-2020 System
Installations
This appendix describes the installation options available for the SMS-301 1:1 Switch
and the SDM-2020 Satellite Modulator.
C.1 Installation Options
C.1.1 Connect Low Voltage Differential Signal Interface (Optional)
Note: The section defines the requirements of the Low Voltage Differential Signal
(LVDS) data interface for video and high-speed data applications used with the
SDM-2020 Satellite Modulator.
C.1.1.1 Description
The 1:1 switch LDVS interface is a plug-in module that interfaces with the SDM-2020
Satellite Modulator. The interface uses serial and parallel clock and data formats, where
as the SDM-2020 LVDS and Digital Video Broadcast (DVB) interfaces are either serial
or parallel format. The difference between the LVDS and DVB (EIA-422) interfaces are
the drivers and receivers.
•
Parallel format: The interface is a DVB 8 bit parallel synchronous (LVDS) or
EIA-422 (DVB).
•
Serial format: MSB (Data 7) is used for serial data and clock.