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Technical Description
This compact receiving antenna system is designed to operate over a very wide bandwidth from the
broadcast band to 30 MHz with superior strong signal performance. The Third Order Intercept
(TOI) is approxi30 dBm, reducing or eliminating spurious signals.
Exceptional feedline decoupling, absent in some other popular designs, greatly reduces feedline
conducted noise and unwanted signal interference.
The active matching system requires well fi10 to +15 Vdc @ 50 mA nominal current. This
power must be supplied through the feedline using the included
DXE-FVI-1
Feedline Voltage
Injector and wall mounted transformer power supply (also included). Alternatively, well filtered
s12 VDC, 1A power may be used with a 1 amp in-line fuse. If used, the
DXE-TVSU-1A
Time Variable Sequencer Unit or
DXE-NCC-1
Receive Antenna Variable Phasing Controller will
supply power for multi-element arrays. The
DXE-TVSU-1A
Time Variable Sequencer Unit and the
DXE-NCC-1
Receive Antenna Variable Phasing Controller will interrupt the power to the
ARAH
for proper grounding during the transmit operation of the transceiver.
Basic Tools Required
5/16", 7/16", 1/2" wrenches or nut drivers, and a 5/8" wrench
# 2 Phillips Head Screw Driver
Manual Updates and Information
Every effort is made to supply the latest manual revision with each product. Occasionally a manual
will be updated between the time your DX Engineering product is shipped and when you receive it.
Please check the DX Engineering web site (www.dxengineering.com) for the latest revision manual.
Installation
Location
The best place to install your active antenna is where you have the recommended space. The
ARAH should be located a minimum of 1/2-wavelength (at the lowest transmit frequency used)
away from any transmit antenna. The
ARAH
antenna should be mounted on its own mast at a
minimum elevation of 20 feet.
If the unit is located 1/10-wavelength to 1/2-wavelength from a transmitting antenna, the unit must
be powered off at least
5 ms
before transmitting on the transmit antenna. The sequencer such as
model
DXE-TVSU-1A
must be used to ensure the correct transmit-to-receive switching.
With this close spacing, coupling from nearby transmit antennas or metal structures becomes more
pronounced. At higher frequencies, where the active element length becomes a partial wavelength,
coupling increases further. Placing an
ARAH
on the same mast or tower as a Yagi or other
transmitting antenna is not recommended for this reason.
The mounting plate assembly consists of two
DXE-SSVC-2P
V-Bolt Mounting Clamps
, two black
polymer plates, 4 polymer spacers and two brass whip-mounting blocks and the associated stainless
steel hardware.
