10
DXE-RTR-2 Rear Panel
MAIN ANT IN: SO-239 connector -
RF connection to a suitable transmit
antenna or load. Connected to the
RADIO connector when the RTR-2 is
not powered or the MAIN ANT/RX
ANT switch in the MAIN ANT
position. When the unit is in the RX
ANT mode, MAIN ANT IN is
connected to MAIN OUT to monitor
transmit antenna. Details in Figure B and text. While compatible with high power amateur radio
stations, the RTR-2 can never be connected to the output of a high power amplifier. The MAIN
ANT IN port must always connect to the input of any linear amplifier or directly to the transmitting
antenna system if no amplifier is in use.
RADIO: SO-239 connector - Transmit and receive RF connection to the transceiver or connection
to the transceiver RX antenna input. Maximum 200 Watts transmit with MAIN ANT connected to a
suitable antenna or load. Connected to the MAIN ANT IN connector when the RTR-2 is not
powered or the MAIN ANT/RX ANT switch in the MAIN ANT position.
RX ANT IN: BNC female connector and F-Connector (in parallel) - Input for receive only
antenna, or from a receive only device.
MAIN ANT OUT: BNC female connector and F-Connector (in parallel) - Output for special
applications, receive only connection of MAIN ANT during receive mode only. Used for transmit
antenna monitoring and pre-amplification or sharing purposes only. Disconnected during transmit
or when unit is switched to MAIN ANT. This port is never connected to options. This port is active
only in the RX ANT receive mode, when POWER is ON and the “RX ANT ACTIVE” Blue LED
is fully illuminated.
RADIO PTT RX ENABLE: RCA female connector - The transmitter amplifier keying line input
connection from transceiver or sequencer (ground on transmit). This two-conductor connection to
the transceiver keying output MUST BE CONNECTED to enable RADIO reception of receive
antenna. This connection is master to the ACC PTT. See section More on Radio PTT-RX ENABLE
ACC PTT: RCA female connector - Keying line pass-through output connection for amplifier or
accessory (grounding keying line only) for automatic relay switching of an accessory. This
connection is a diode protected pass through of the ground on transmit from the RADIO PTT and
is NOT INTERCHANGEABLE with RADIO PTT. There is no delay in this signal. See section
More on Radio PTT-RX ENABLE and Caution
12 Vdc: The RTR-2 operates on +13.8 Vdc 2A and accepts well-filtered, +13.8 to +21 Vdc for
normal operation. A 2.1 mm screw on plug, center positive power plug is included with the RTR-2
which is intended to prevent accidental disconnection (a standard 2.1 mm plug will also work).
Supports external active antennas that require higher feedline voltage from the RTR-2. The RTR-2
will accept up to 21 Vdc input. The use of some switching power supplies is discouraged due to the
presence of RF noise in their output.
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