Comtech EF Data CRS-280L - Manual (Page 47)

CRS-280L L-Band IF Switch for 1:N Redundancy Revision 1
Cables and Connections MN/CRS280L.IOM
4–9
Cable connections are defined as follows:
L-Band Modem Connection CRS-280L Connection Comments
Redundant Modem
TX Output
↔
TX Backup (TX In)
RX Input
↔
RX Backup (RX Out)
Prime Modem #1
TX Output
↔
TX 1 (TX In)
RX Input
↔
RX 1 (RX Out)
Prime Modem #2
TX Output
↔
TX 2 (TX In)
RX Input
↔
RX 2 (RX Out)
Prime Modem #3
TX Output
↔
TX 3 (TX In)
RX Input
↔
RX 3 (RX Out)
Prime Modem #4
TX Output
↔ TX 4 (TX In)
RX Input
↔
RX 4 (RX Out)
Prime Modem #5
TX Output
↔
TX 5 (TX In)
RX Input
↔
RX 5 (RX Out)
Prime Modem #6
TX Output
↔ TX 6 (TX In)
RX Input
↔
RX 6 (RX Out)
Prime Modem #7
TX Output
↔
TX 7 (TX In)
RX Input
↔
RX 7 (RX Out)
Prime Modem #8
TX Output
↔ TX 8 (TX In)
RX Input
↔
RX 8 (RX Out)
Prime Modem #9
TX Output
↔
TX 9 (TX In)
RX Input
↔
RX 9 (RX Out)
Prime Modem #10
TX Output
↔
TX 10 (TX In)
RX Input
↔
RX 10 (RX Out)
4.3.3 L-Band Uplink/Downlink Cable Connections
CAUTION
The CRS-280L is not designed to convey DCpower to external equipment such as
LNBs or BUCs. Do not apply DC power to the L-Band input and output (Type ‘N’)
ports of the switch.
CEFD recommends that connections to uplink and downlink equipment be made after all other
system cabling and configuration is complete. Cabling to and from the CRS-280L uplink and
downlink ports is dependant on the system configuration and the uplink/downlink equipment
used. For additional information, refer to the uplink/downlink equipment documentation.