DX Engineering ISO-PLUS User manual

ISO-PLUS
DXE-ISO-PLUS-2
DXE-ISO-PLUS-10
Patent Pending
DXE-ISO-PLUS-INS Revision 0b
© DX Engineering 2021
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: [phone] ∙ Tech Support and International: [phone]
Fax: [phone] ∙ E-mail: [email protected]

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Introduction
The DX Engineering ISO-PLUS is an Ethernet filter that joins two RJ-45 connectors together and provides
common mode interference filtering for 160 through 10 meters.
RF interference can creep in to your received signals from a host of things normally
found around the house or radio room. One major area of concern is the RJ-45 cables
used for Ethernet connections between your personal computers, printers, routers,
cable modems, transceivers, (and the list goes on).
RF can creep in from switching power supplies, wall power adapters, touch lamps,
appliances and just about anything near RJ-45 cables. The RF generated internal to
the device is then radiated over the RJ-45 cable. Once RF is in the RJ-45 cable it acts
as an antenna and radiates RF signals that can be picked up by your receiver.
The DX Engineering ISO-PLUS units have no effect on the Ethernet signal levels or speed.
Always use clean power supplies. Linear power supplies are usually better than switching power supplies.
Some switching power supplies that are specifically for amateur radio use usually have extra internal filtering
to avoid causing RF interference in the amateur radio bands. Most wall adapters to not have extra filtering
and can cause significant interference problems.
Proximity of transmitting antennas near internal wiring can cause interference that gets into RJ-45 cables.
Even if the cables are “shielded”, and especially if the shield is terminated at both ends of the cable, then the
shield becomes just another conductor which can receive unwanted signals and reradiate them just as any
other wire in the cable might do.
With the DX Engineering ISO-PLUS units installed you can reduce RF
interference caused by RJ-45 cables from the devices they are plugged into.
Normally installed in pairs - One installed at the RJ-45 Ethernet plug of one
device and the other plugged into the RJ-45 Ethernet plug on the other device.
Be aware that other good RF practices must also be taken around the shack to
eliminate noise interference such as proper grounding, good quality coaxial cable,
tight positive mechanical connections where used and other good RF practices.
The DX Engineering ISO-PLUS units are one more tool that can be used to improve your reception of those
weak signals. “If you can’t hear them, you can’t work them.”
Features
Reduces common mode RF interference on RJ-45 cables
Effective filtering for 160 through 10 meters
Does not effect Ethernet signals or speed
Works with CAT5, CAT5E, CAT6 and CAT6A cables with RJ45 connectors
Provides common mode RF attenuation from 160 meters through 10 meters
Each ISO-Plus comes with one six inch shielded RJ-45 Hook up cable (color may vary)
Note: The ISO-PLUS units are for use with Ethernet cables only. Not to be used on other
products that have an RJ-45 cable such as Microphones, SignaLink units, etc. Additionally,
any cable used that supplies power over Ethernet (POE - Power over Ethernet) will not work -
the ISO-PLUS units do NOT pass DC voltages, they will short the POE to ground.

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Common Mode RF Attenuation
The following graphs show the common mode RF attenuation for a typical installation of two DX
Engineering ISO-PLUS units. Graphs show 100 KHz-30 MHz and 100-1.8 MHz to show the noise
attenuation from below 160 meters to just above 10 meters for reference.
Typical Hook Up

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The DX Engineering ISO-PLUS is offered in two varieties: A 2 unit package DXE-ISO-PLUS-2 or
a 10 unit package DXE-ISO-PLUS-10.
DXE-ISO-PLUS-10
DXE-ISO-PLUS-2
Manual Updates
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.
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 e-mail us at: [e-mail]
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.
©DX Engineering 2021
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Specifications subject to change without notice.