Intermediate Frequency Switch (Ifs20) Configurations; Figure 1-12 70/140 Ifs20 Intermediate Frequency Switch - Front Panel; Figure 1-13 70/140 Ifs20 Intermediate Frequency Switch - Back Panel - Comtech EF Data Radyne RCS20 Installation And Operation Manual

RCS20 M:N Redundancy Switch Revision 15
Introduction MN-RCS20 and CD-RCS20

1.3.3 Intermediate Frequency Switch (IFS20) Configurations

The IFS20 Intermediate Frequency Switch interfaces the IF signals of the modems with the Earth Station
IF system and provides backup switching. The RCU20 can be configured with or without the IFS20. When
the system does not require independent uplink and downlink ports, then the RCU20 will monitor the
status of the primary modem and ensure backup when a primary modem faults.
When the system is configured with an IFS20, it will provide all of the switching relays and optional signal
splitters that are necessary to connect any combination of up to nine Modulators and Demodulators to
nine independent uplink and nine independent downlink transponders. The IFS20 receives control and
DC power through an interconnecting cable from the RCU20. The IFS20 is available in the following three
configurations:
1.3.3.1 70/140 IFS20
The IFS20 configuration is used for 70/140 MHz.
Figure 1-12 70/140 IFS20 Intermediate Frequency Switch – Front Panel
Figure 1-13 70/140 IFS20 Intermediate Frequency Switch – Back Panel
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