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FM receivers employ a special detector for FM signals and exhibit a phenomenon known as the capture effect, in which the tuner "captures" the stronger of two stations on the same frequency while rejecting the other (compare this with a similar situation on an AM receiver, where both stations can be heard simultaneously).
HD Radio is used primarily by AM and FM radio stations in the United States, U.S. Virgin Islands, Canada, Mexico and the Philippines, [citation needed] with a few implementations outside North America. HD Radio transmits the digital signals in unused portions of the same band as the analog AM and FM signals.
Comparison of AM and FM modulated radio waves (from Radio) Image 30 Frequency spectrum of a typical modulated AM or FM radio signal. It consists of a component C at the carrier wave frequency f c {\displaystyle f_{c}} with the information ( modulation ) contained in two narrow bands of frequencies called sidebands ( SB ) just above and below ...
FM AM USB LSB RTTY W N few 7.5 7 38 2 IR Icom R72 Hobbyist 1990 Icom R75 Hobbyist 1990 -60 triple conversion SSB AM S-AM CW FM 2.1 6 12 99 3 94x241x229 3 35 1 CI-V RS232 +16 [29] Icom R8500 Hobbyist 1990 1000 CI-V RS232 Icom R8600 Hobbyist 2016 .01-3000 SDR + superhet S-AM, AM, USB, LSB, CW, FM, RTTY, D-STAR, NXDN, dPMR, DCR and APCO P25: 2000
A portable battery-powered AM/FM broadcast receiver, used to listen to audio broadcast by local radio stations. A modern communications receiver, used in two-way radio communication stations to talk with remote locations by shortwave radio. Girl listening to vacuum tube console radio in the 1940s.
AM detectors cannot demodulate FM and PM signals because both have a constant amplitude. However an AM radio may detect the sound of an FM broadcast by the phenomenon of slope detection which occurs when the radio is tuned slightly above or below the nominal broadcast frequency. Frequency variation on one sloping side of the radio tuning curve ...
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