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What are AM, FM & SW in radio stations.

Tags: fm, sw in radio stations
Asked by guruchawla, 02 May '08 10:41 am
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fREQUENCY MEDIUM,aMPLITUDE MODULATION AND SHORT WAVE THESE ARE THE TERMS ASSOICATED WITH BROADCASTING AND SOUND WAVES;AM radio band (group of frequencies). AM stands for amplitude modulation, which will be explained later.

AM radio ranges from 535 to 1705kHz (kilohertz, or thousands of cycles per-second of electromagnetic energy). These are the numbers you see on your AM radio dial, and some stations seen to endless repeat when they promote themselves.

Answered by srini, 02 May '08 10:43 am

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AM: Amplitude Modulation
AM broadcasting is the process of radio broadcasting using amplitude modulation.
AM radio began with the first, experimental broadcast in 1906 by Reginald Fessenden, and was used for small-scale voice and music broadcasts up until World War I. The great increase in the use of AM radio came the following decade. The first licensed commercial radio services began on AM in the 1920s. XWA of Montreal, Quebec (later CFCF) was the first commercial broadcaster in the world, with regular broadcasts commencing on May 20, 1920. The first licensed American radio station was started by Frank Conrad, KDKA in Pittsburgh, Pennsylvania. Radio programming boomed during the "Golden Age of Radio" (1920s1950s). Dramas, comedy and all other forms of entertainment were produced, as well as broadcasts of news and music.

FM: Frequency Modulation
In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast ...more
Answered by Sunita, 02 May '08 10:47 am

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