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
