DX Engineering DXE-FVI-1 Instructions manual

Receive Feedline Voltage Injector

DXE-FVI-1

DXE-FVI-1-INS Revision 1

The DXE-FVI-1 DX Engineering Feedline Voltage Injector is a high­quality single polarity bias-tee device that places a direct current voltage
onto a receive antenna system coaxial cable. This DXE-FVI-1 voltage
injector is used to power active accessory devices, such remote relays,
switching systems, and preamplifiers. This is the original equipment
DXE-FVI-1 unit that is provided with single DX Engineering active
receive antenna models. Voltage is applied to the receive antenna
feedline F-connector. The RCA phono jack connects to the receiver
input with DC blocked, while it passes RF from 100 kHz through 30 MHz.
Two feedline voltage injectors may be connected at opposite ends of a feedline to provide DC voltage
on the transmission line for your own custom application, keeping the input and output RF devices
isolated from the voltage. The 2.1 mm power connector may be connected to the included 120 Vac 60
Hz wall transformer power supply, for +12 Vdc on the coaxial cable center conductor. A station power
supply, +1 to +18 VDC, may also be used with an in-line, 1 ampere, fast-blow fuse for various devices.

This is a Receive ONLY device; do NOT transmit through this device.

The DXE-FVI-1 Features:

 Housed in an aluminum case with mounting tabs
 F-Connector for receiving antenna coaxial cable connection (usually RG6U type coaxial cable).

This connector has the DC voltage applied as well as the RF signal

 RCA phono jack for output of the RF (DC blocked)
 2.1 mm jack for DC power input/output
 120 Vac 60 Hz to +12 Vdc @ 500 mA wall transformer power supply with 2.1 mm connector

When connecting the DXE-FVI-1 to your receiver input - ensure you have the connections correct. The
RADIO connection does not have the DC voltage on it. If connected incorrectly (connecting the ANT to
your receiver input) you will apply unexpected DC voltage to your radio and possibly cause damage.

Depending on your power requirements, you may feed positive or negative voltages through the DXE-
FVI-1. This can be used to allow control for 3-way remote switching (+DC, ZERO, and -DC voltages
for control). However, if a negative control voltage is used, it MUST be supplied from an isolated DC
source: the negative lead of the isolated source is not connected to the common station ground. The use
of an AC-DC Wall Adapter power source is perfect for this application.

Note: Always ensure that your control voltage polarity is compatible with the requirements of your
remote device. Applying the incorrect polarity could damage your remote device.

Note: Always verify that there are no other connections on the coax feed-line which could cause a DC
short or very low impedance on the coax line. These items include baluns or remote switches that
ground the coax when not in use. A DC low impedance or short on the coax will draw excess current
and damage the DXE-FVI-1. Another thing to keep in mind is some lightning protectors block DC
(PolyPhaser). Therefore you must insert or extract the voltage required without trying to pass through
DC block protectors. You may use a DC pass surge protector, such as the DXE-RLP-75FF.

There are three connectors on the DXE-FVI-1: 2.1 mm jack for
voltage input/output. RCA phono plug for connection to a receiver
input or RF device not powered on coax. F-connector for coaxial
cable connection to the device that uses the +12 Vdc or to another
DXE-FVI-1 to remove the +12 Vdc from the coaxial cable and
send it to a remote device.

The picture on the left shows a DXE-FVI-1 being used to power
the DXE-ARAV3 Active Vertical Receive Antenna with +12
Vdc. The 2.1 mm connector is the input for the +12 Vdc. The
RCA phono connects to the receiver (RF only), the F-Connector
connects to the Active Receive Antenna (RF and +12 Vdc).

The picture on the right shows a DXE-FVI-1 being used to power

the DXE-RSEAV-1FVI Active Vertical Receive Antenna with +12 Vdc. The 2.1
mm connector is the input for the +12 Vdc. The RCA phono connects to the
receiver (RF only), the F-Connector connects to the Active Receive Antenna (RF
and +12 Vdc).

The picture shown below is an example of using two DXE-FVI-1 units to send +12 Vdc from the radio
room to a remote device - in this example a remotely mounted receive pre-amplifier.

Technical Support
If you have questions about this product, or if you experience difficulties during the installation, contact DX Engineering at [phone]. You can also e­mail us at:

[e-mail]

For best service, please take a few minutes to review this instruction sheet before you call.

Warranty

All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering’s sole obligation under
these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of
parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering. If DX Engineering’s products are claimed to be defective in material or workmanship, DX
Engineering shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-charges prepaid by Buyer). Every such claim for breach of these warranties shall be
deemed to be waived by Buyer unless made in writing. The above warranties shall not extend to any products or parts thereof which have been subjected to any misuse or neglect, damaged by accident,
rendered defective by reason of improper installation, damaged from severe weather including floods, or abnormal environmental conditions such as prolonged exposure to corrosives or power surges, or by the
performance of repairs or alterations outside of our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at Buyer’s specifications. In addition, DX Engineering’s
warranties do not extend to other equipment and parts manufactured by others except to the extent of the original manufacturer’s warranty to DX Engineering. The obligations under the foregoing warranties
are limited to the precise terms thereof. These warranties provide exclusive remedies, expressly in lieu of all other remedies including claims for special or consequential damages. SELLER NEITHER MAKES
NOR ASSUMES ANY OTHER WARRANTY WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NO
PERSON IS AUTHORIZED TO ASSUME FOR DX ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE FOREGOING.
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