DX Engineering ISO-PLUS Ethernet RF Filters

*US Patent No. 11,211,679 B2

DX Engineering ISO-PLUS Ethernet RF Filters are very effective EMI Suppressors that are quickly and easily connected inline on Cat5e or Cat6 network cables. Their patented* design provides common mode RF interference and EMI noise filtering of radio frequencies from well below 1 MHz to over 100 MHz. DX Engineering ISO-PLUS Ethernet RF Filters are bidirectional (input and output is interchangeable) and they have no effect on digital throughput; Ethernet data signal levels and speed remain unchanged. NOTE: DC The ISO-PLUS filters are for use with Ethernet cables only. They are not to be used on other products that have an RJ-45 cable such as radio microphones, audio interfaces (SignaLink), etc. Additionally, any cable used that supplies power over Ethernet will not work - the ISO-PLUS units do NOT pass DC voltages and do not support PoE (Power over Ethernet).

Electromagnetic interference (EMI), also known as RF interference (RFI), can be imposed onto your received radio and data signals from many electronic devices normally found around a residence, a radio room or a business network. Areas of major concern are Gigabit Ethernet Cat5(e) and Cat6 cables used for network (LAN) connections between personal computers, printers, multi-port switches, cable modems, routers and radio transceivers, and between many other devices.

DX Engineering ISO-PLUS RF filters, installed on both ends of Ethernet cables, work two ways. First, they can mitigate RF interference caused to the Ethernet connected device. Second, they can reduce interference to radio receivers and other Ethernet devices that is caused by RFI or EMI generated by an Ethernet connected device. ISO-PLUS filters are sold in pairs and are normally installed at each end of an Ethernet cable; one filter at the RJ-45 Ethernet plug of the first device and the other filter at the RJ-45 Ethernet plug of the second device. Each ISO-Plus comes with one six inch shielded RJ-45 patch cable (color may vary).

Features of DX Engineering ISO-PLUS Ethernet RF Filters:

• Suppress EMI by reducing common mode RF interference to and from Ethernet cables
• Effective from well below 1 MHz  through 100 MHz (including 160 through 6 meter Amateur bands)
• Support 10/100 Mbps Fast Ethernet and GbE Gigabit Ethernet with no effect on data signal or speed
• Work with Cat5, Cat5e, Cat6 and Cat6A cables with RJ-45 male connectors
• Provide common mode RF attenuation resulting in reduced or eliminated EMI or RFI
• Each ISO-PLUS comes with one six inch shielded RJ-45 Hook-up Ethernet patch cable (color may vary)

Designed to be installed in pairs; offered in a two-filter package DXE-ISO-PLUS-2 or a ten-filter package DXE-ISO-PLUS-10.

Common Mode RF Attenuation for a typical installation of DXE-ISO-PLUS-2.

RFI can creep in from switching power supplies, wall power adapters, dimmer switches, touch lamps, appliances and just about anything near Ethernet cables. The RFI generated internally by the device can be radiated over the Ethernet cable. Once RFI is in the Ethernet cable it acts as an antenna and radiates RF signals that can be picked up by your receiver. Proximity of transmitting antennas near internal wiring can cause interference that gets into Ethernet cables. Even if the RJ-45 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. ISO-PLUS RF Filters can reduce or eliminate this trouble.

Always use RF clean power supplies. Linear power supplies are usually better than switching power supplies. Some switching power supplies that are specifically designed for use with Amateur radios usually have extra internal filtering to avoid causing RF interference in the amateur radio bands. However, most wall adapters do not have proper filtering and can cause significant interference problems.

Be aware that proper equipment installations will contribute to the reduction or elimination of RF and noise interference. Proper power and RF wiring and grounding, quality coaxial cable and connector installation, and tight positive mechanical connections are all very important, as well as other good RF practices. DX Engineering offers many useful accessories for the reduction of RFI in the station including DX Engineering Ferrite and the Radio RF Ground Plane Kits

DX Engineering ISO-PLUS Ethernet RF Filters are an important tool to improve productivity and radio reception of weak signals. “If you can’t hear them, you can’t work them.” Order ISO-PLUS Ethernet RF Filters exclusively from DXEngineering.com