Comtech EF Data CRS-280L - Manual (Page 20)

CRS-280L L-Band IF Switch for 1:N Redundancy Revision 1
Introduction MN/CRS280L.IOM
1–2
Splitter Splitter Splitter Splitter Splitter Splitter Splitter Splitter Splitter Splitter
Rx1 Rx2 Rx3 Rx4 Rx5 Rx6 Rx7 Rx8 Rx9 Rx10
Tx2 Tx1 Tx3 Tx4 Tx5 Tx6 Tx7 Tx8 Tx9 Tx10
Backup
Modulator
Control
Interface
& Drivers
Test
Out
Test
In
Redundant
Power
Downlink Inputs
Prime Modulators
Prime Demodulators
Backup
Demodulator
Uplink Outputs
A
B
CRS
SMS
has a transmit section with TX input / uplink output and a receive section with Rx output /
downlink input.
Figure 1-2 depicts the system level block diagram for a CRS-280L-equipped 1:10 redundancy
system.
Figure 1-2. 1:10 Redundancy w/CRS-280L – System-level Block Diagram
1.1.1 Compatibility
CAUTION
1. The Comtech EF Data CRS-280L L-Band IF Switch is designed specifically as
an accessory product for Comtech EF Data equipment. It is
not
designed to
operate with any other manufacturer's equipment.
2. The CRS-280L is not designed to convey DC power 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. In addition, the CRS-280L is not designed to
pass to 10 MHz reference or FSK signaling.