4
For normal operation, the RTR-2 requires the
RADIO PTT – RX ENABLE
keying cable to be
installed. It can be as simple as a common RCA patch cable connection on transceivers that have a
keying connector RCA shell at chassis ground. Most other transceivers’ keying common is tied to
the transceiver chassis. The exception is most Kenwood transceiver keying relays with floating
common. To facilitate connections to most Kenwood 7-pin DIN Remote connectors, a new keying
line cable is available from DX Engineering, the
DXE-KWD-RTR.
This special cable assembly
allows proper operation of a Kenwood transceiver with the RTR-2. See more details in manual
sections entitled “
RTR-2 Technical Description and Functional”
and
“More on Radio PTT – RX
Enable Failsafe Feature.”
Note:
Every radio manufacturer’s accessory interconnection scheme is different. Consult
your radio manufacturer’s manual for details and requirements for receive signal inputs,
outputs and switching voltages.
Features of the DXE-RTR-2 Receive Transmit Interface:
Attractive and heavy stainless steel enclosure
Multi-Color Status Indicating LEDs for
Power
,
Option
Power
and
Mode
Safe switching - automatically connects radio to transmit antenna when dc power is off
Hot switching lockout – disconnects receive antenna during transmit mode
Adds protection and antenna switching flexibility, even for transceivers with receive ports
Connects transmit antenna to second receiver (
MAIN ANT OUT
) when transceiver is
listening to receive antenna
Handles up to 200 watts (CW) of transmit RF
Fast relay supports QSK, full break-in CW (use partial break-in CW operation when using
Bias Tee powered active receive antennas)
Transceiver amplifier keying line input RCA female,
RADIO PTT
with
RX Enable
output
supports
RTR-2
failsafe
Accessory keying line output RCA female (
ACC PTT
) ‘ground on transmit’ Schottky diode
isolated pass-through from
RADIO PTT
transceiver amp keying for Amplifier or Accessory
Three internal option slots for Plug-In Modules
Internal 50 ohm impedance – rear panel SO-239 for
RADIO
and
MAIN ANT
Receive Antenna Input – BNC for 50 ohm and F connector for 75 ohm feedlines (use 75 to
50 ohm Impedance Transformer Plug-In Module -
DXE-IT-PM
)
Internal jumpers to enable and lock bias-tee DC power injection onto receive feedline for
Active Vertical or Magnetic Loop Antennas and to lock receive mode (disable failsafe)
Screw-on version of the DC power connector is provided to prevent accidental power cable
pull-out (standard type 2.1 mm DC power connector may be used)
Operates on +13.8 Vdc nominal, accepts and operates on any voltage from +13 to +21 Vdc input to
power the RTR-2 and Active antennas connected (voltage may have to be higher for long
feedlines). DX Engineering Active Magnetic Loops r21 Vdc and DX Engineering Active
Receive Verticals r13.8 Vdc minimum.
