Abbreviated RFI. Many electronic devices, including computers and peripherals, can interfere with other signals in the radio-frequency range by producing electromagnetic radiation; this is normally r ... more
RFI. Many electronic devices, including computers and peripherals, can interfere with other signals in the radio-frequency range by producing electromagnetic radiation; this is normally regualated by government agencies in each country.
RFI is commonly generated by devices that switch the output power at some voltage other than zero. Typically, phase-angle fired SCRs may generate RFI while zero-cross fired SCRs virtually eliminate RFI.
RFI is manmade or natural, intentional or unintentional electromagnetic propagation which results in unintentional and undesirable responses from or performance degradation or malfunction of, electronic equipment.
Often synonymous with electromagnetic interference, RFI is a frequency range containing coherent electromagnetic radiation of energy useful for communication purposesâ€”roughly the range from 10 kHz to 100 GHz. This energy may be transmitted as a byproduct of an electronic device's operation. RF is transmitted through two basic modes: Radiated emissions: The component of RF energy that is transmitted through a medium as an electromagnetic field. RF energy is usually transmitted through free space; however, other modes of field transmission may occur. Conducted emissions: The component of RF energy that is transmitted through a medium as a propagating wave, generally through a wire or interconnect cables.
Typically experienced as "snow" in a TV screen or "pops" in your speakers, there are numerous sources of radio interference. Some sources are nearby like CB or Ham radios, or cell phones. Other sources can be far away like radio stations, microwave towers and the like.
An unwanted electrical signal that travels through the air or follows the path of a conductor and interferes with communications. Some common causes of RFI include light dimmers, fluorescent lights, variable frequency drives, and computers.
This type of interference results from radio waves that can be generated by radio stations, microwaves, cell phones, lawn mowers, generators, CB radios, and many other sources. Often originating a great distance from your home, these patterns of interference can be heard as clicks, pops, and sometimes even unwanted voices, and can be seen as "snow" on your TV's picture.
A signal (noise) that is radiated or conducted from one electronic circuit or device the may cause incorrect operation interference in another electronic circuit or device. An electronic circuit or device can be an emitter of electromagnetic interference (EMI) or susceptible to electromagnetic interference.