Selectivity is a measure of the performance of a radio receiver to respond only to the tuned transmission (such as a radio station) and reject other signals nearby, such as another broadcast on an adjacent channel. This article needs to be cleaned up to conform to a higher standard of quality. ... In radio terminology, a receiver is an electronic circuit that receives a radio signal from an antenna and decodes the signal for use as sound, pictures, navigational-position information, etc. ... A Sansui TU-X1 stereo FM tuner. ... In communications, transmission is the act of transmitting electrical messages (and the associated phenonomena of radiant energy that pass through media). ... To meet Wikipedias quality standards and appeal to a wider international audience, this article may require cleanup. ... In telecommunication, signalling (or signaling) has the following meanings: The use of signals for controlling communications. ... Wikibooks has more about this subject: Marketing Note: broadcasting is also a term for hand sowing. ... In broadcasting an adjacent channel is an AM, FM, or TV channel that is next to another channel. ...

Selectivity is usually measured as a ratio in decibels (dBs), comparing the signal strength received against that of a similar signal on another frequency. If the signal is at the adjacent channel of the selected signal, this measurement is also known as adjacent-channel rejection ratio (ACRR). A ratio is a dimensionless, or unitless, quantity denoting an amount or magnitude of one quantity relative to another. ... The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. ... In telecommunications, and particularly in radio, signal strength is the measure of how strongly a transmitted signal is being received, measured, or predicted, at a reference point that is a significant distance from the transmitting antenna. ... Sine waves of various frequencies; the bottom waves have higher frequencies than those above. ... Various meters Measurement is the estimation or determination of extent, dimension or capacity, usually in relation to some standard or unit of measurement. ...

Selectivity also provides some immunity to blanketing interference. Blanketing is the interference caused by very strong radio signals. ... Interference of two circular waves - Wavelength (decreasing bottom to top) and Wave centers distance (increasing to the right). ...

LC circuits are often used as filters; the L/C ratio determines their selectivity. For a series resonant circuit, the higher the inductance and the lower the capacity, the narrower the filter bandwidth. For a parallel resonant circuit the opposite applies. LC circuits behave as electronic resonators, which are a key component in many applications such as oscillators, filters, tuners and frequency mixers. ...