6
Option 2 – middle slot may be used for the Receiver Guard Plug-In
Module (DXE-RG5000HD-PM) when high RF signal levels are
anticipated to occur on the receive antenna input.
Option 3 – bottom slot, switched and powered is reserved for Receive
Preamplifier Plug-In Modules (DXE-RPA-2-PM) as controlled by the
Option Power switch. When the RTR-2 is used with passive receive
antennas or an Active Receive Vertical (DXE-ARAV3-1P), the
installation of the RPA-2 plug-in modules is highly recommended to
enhance low signal levels due to propagation and atmospheric conditions.
See the section on Removing Bypass Plug-in Boards and the section on Installing Optional Modules
Internal Relay Connections and Functions
The RTR-2 high-speed relay toggles the MAIN ANT IN and RADIO connectors simultaneously.
This is a reverse-logic relay which prevents the RADIO connection to the optional modules and RX
ANT IN receive signal unless certain connections are met, to prevent the transmitted RF from
causing damage.
In Figure A, the RTR-2 is in MAIN ANT transmit mode. MAIN ANT IN is internally connected
to the RADIO when the power is turned Off.
The RTR-2 stays in the transmit mode and the mode LED changes to Red when:
An antenna is connected to MAIN ANT IN
A coaxial cable is connected from the transceiver RF output to RADIO (or from transceiver
RX ANT IN)
The Power switch is set to On
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