Comtech EF Data CDM-425, Installation And Operation Manual

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CDM-425 Advanced Satellite Modem
Revision 0
Introduction 1–9 MN-CDM-425
1.3.8 Supporting Hardware and Software
Redundancy Support: Comtech EF Data provides redundant operations support to the
CDM-425 Advanced Satellite Modem as follows:
•
For 1:1 redundancy applications, via its low-cost external CRS-170A L-Band and CRS-
180 70/140 MHz IF 1:1 Redundancy Switches.
•
For M:N redundancy (hub) applications, via its external CRS-300 1:10 Redundancy
Switch or the CRS-500 M:N Redundancy System.
Transceiver Support: The CDM-425 Advanced Satellite Modem is a companion product for
Comtech EF Data’s CSAT-5060 and KST-2000A/B RF Transceivers. The modem incorporates a
Frequency Shift-keying (FSK) serial link that can be activated on the Rx-IF port for the purpose of
communicating with a transceiver, if connected. In this manner, you may configure, monitor and
control the transceiver using either the front panel display and keypad or any of its remote control
interfaces. The EDMAC channel may also be used to convey M&C data to a transceiver at the
distant end of a satellite link, if it is connected to a CDM-425.
BUC Support: The CDM-425 Advanced Satellite Modem incorporates an FSK serial link that can
be activated on the Tx-IF port for the purpose of communicating with an FSK-capable “smart”
BUC. This link is designed to be compatible with the Global very small aperture terminal (VSAT)
Forum/ND SatCom specification. In this manner, you may configure, monitor and control the
block up converter (BUC) using either the front panel display and keypad or any of its remote
control interfaces.
Additionally, Comtech EF Data provides for an "Advanced FSK" for use with its LPOD BUCs, re-
using the existing FSK channel to pass additional "proprietary" commands to expand front panel
user control. The EDMAC channel can be used to convey M&C interface to a BUC at the distant
end of a satellite link, if it is connected to a CDM-425 Advanced Satellite Modem.