In telecommunication, the capture effect, or FM capture effect, is a phenomenon, associated with FM reception, in which only the stronger of two signals at or near the same frequency will be demodulated. BlackBerry 7100t Telecommunication refers to the communication of information at a distance. ... The abbreviations FM, Fm, and fm may refer to: Electrical engineering Frequency modulation (FM) and its most common applications: FM broadcasting, used primarily to broadcast music and speech at VHF frequencies FM synthesis, a sound-generation technique popularized by early digital synthesizers Science Femtometre (fm), an SI measure of length... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ...

The capture effect is defined as the complete suppression of the weaker signal occurs at the receiver limiter, if it has one, where it is not amplified, but attenuated. When both signals are nearly equal in strength, or are fading independently, the receiver may switch from one to the other. 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. ... In electronics, a limiter is a circuit that allows signals below a set value to pass unaffected, as in a Class A amplifier, and clips off the peaks of stronger signals that exceed this set value, as in a Class C amplifier. ... Fading (or fading channels) are mathematical models for the distortion that a carrier-modulated telecommunication signal experiences over certain propagation media. ... Electrical switches. ...

Note: AM radio transmission is not subject to this effect. For this reason, the aviation industry and others have chosen to use AM for communications rather than FM, allowing multiple signals to be broadcasted on the same channel. AM radio is radio broadcasting using Amplitude Modulation. ...

However, for digital modulation schemes this is not the whole story. It has been shown that for properly implemented OOK/ASK systems, co-channel rejection can be better than for FSK systems. On-off keying (OOK) is a type of modulation that represents digital data as the presence or absence of a carrier wave. ... Amplitude-shift keying (ASK) is a form of modulation which represents digital data as variations in the amplitude of a carrier wave. ... This article or section is in need of attention from an expert on the subject. ...

Source: from Federal Standard 1037C and from MIL-STD-188 Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ... MIL-STD-188 is a series of U.S. military standards relating to telecommunications. ...