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FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong , wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio .
- FM Broadcast Band
Graphical depiction of FM broadcasting allotments. The FM...
- Radio Broadcasting
Broadcasting tower in Trondheim, Norway. Radio broadcasting...
- FM Broadcast Band
In the United States, FM broadcasting stations operate on a 20.2 MHz-wide frequency band, spanning from 87.8 MHz to 108 MHz. This is divided into 101 0.2 MHz-wide channels, which are designated as channels 200 through 300. In actual practice, few except the FCC use these channel numbers; the frequencies are used instead.
FM sound broadcasting began in the United Kingdom on 2 May 1955 when the BBC started an FM broadcasting service the Light Programme, the Third Programme and the Home Service to the south east of England. There are now over 40 BBC and over 250 commercial FM sound broadcasting stations in the United Kingdom.
BEFORE FM, THERE WAS APEX. In the early and mid-1930s, radio communication was confined to the Low Waves (100-500 kHz), Medium Waves (500-1500 kHz), and the Short Waves (1,500 to 30,000 kHz). The frequencies above that, referred to as the “ultra-high frequencies”, were truly the “Wild West” of radio. It was a place for experimentation ...
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In 1937, W1XOJ, the first experimental FM radio station after Armstrong's W2XMN in Alpine, New Jersey, was granted a construction permit by the US Federal Communications Commission (FCC). FM in Europe. After World War II, FM radio broadcasting was introduced in Germany.