25
Additional System Configurations
Diagram 4
shows the legacy receiving application which is similar to the NCC-2 with active
receive antennas. The
DXE-RTR-2
Receive Antenna Interface for Transceivers now allows owners
of transceivers which lack a receive antenna input to use a phased receive antenna array. This
diagram shows the connections for use of the
DXE-AAPS3-1P
Electronically Rotatable Receive
Antenna System, which consists of two active receive vertical antennas and the
DXE-NCC-1
Receive Antenna Variable Phasing Controller using the
DXE-RTR-2
Receive Transmit Relay.
Diagram 5
includes the exceptional
DXE-RPA-2-PM
Receive Preamplifier Plug-In Module with
the main (transmit) antenna. For many years Amateurs have been requesting a method to employ a
receiving device on their transceivers which lack a built-in preamplifier. The
DXE-RTR-2
provides
this connection option. Instantaneous receive comparisons between 'preamplifier in' and
'preamplifier out' are easily accomplished using the
DXE-RTR-2
MAIN ANT - RX ANT - MAIN
ANT
toggle switch.
Diagram 6
demonstrates another common use for the
DXE-RTR-2
and the connections required
for use of a two direction
DXE-RBSA-1P
Reversible Beverage Antenna System
.
Diagram 7
shows how a
DXE-RFS-SYS-4P
Complete Receive Four Square Array Package
connected to a transceiver that does not offer a receive antenna input.
Diagram 8
demonstrates how the
DXE-RTR-2
may be used in a classic T/R relay application with
an added bonus! The popular optional accessory for older receivers, the DX Engineering Receive
Preamplifier model
DXE-RPA-2,
may be used externally, for improving older receiver sensitivity of
the transmit antenna, especially on higher frequencies. When the pre-amp is not required, it may be
internally bypassed by removing the DC power to it. (The RTR-2 option slots are not used).
Set the
MAIN ANT - RX ANT - MAIN ANT
toggle switch to the
RX ANT
(center) position to
connect the
MAIN ANT
to your receiver. When you key the transmitter, the
DXE-RTR-2
's
automatic 4 ms changeover from receive to transmit switches the
MAIN ANT
to the transmitter.
Manually switching the toggle switch to the
MAIN ANT
(up) position connects the
MAIN ANT
to
the transmitter, if desired for tune up operations.
The power limit for the transmitter is 200 watts
.
The keying line from the transmitter must be a Ground-On-Transmit type, as the
DXE-RTR-2
cannot accept any keying voltage. If the only keying line from the transmitter is a positive or
negative voltage type, then a KD9SV Products
SVP-SV-KR
must be used in the transmitter keying
line, as shown in
Diagram 8
.
A muting line from the transmitter which may provide a ground for an older receiver, cannot be
shared with the
DXE-RTR-1A
, as many old receivers* require the grounding of a high voltage for
muting. However, use the RTR-2
ACC PTT
line, and an extra relay if necessary, for receiver mute.
Diagram 9
illustrates a special application with no receive antenna connections, using the
DXE-
RTR-2
with an optional
DXE-RSC-2
Two-Port Splitter/Combiner to allow one transmitting
antenna to be shared for simultaneous receive on two transceivers or with one transceiver and one
receiver. The second radio (SDR spectrum display) is isolated from transmit energy by the
DXE-
