fm broadcasting wikipedia - EAS
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FM broadcasting - Wikipedia
FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio. FM broadcasting is capable of higher fidelity—that is, more accurate
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Xem thêmThroughout the world, the FM broadcast band falls within the VHF part of the radio spectrum. Usually 87.5 to 108.0 MHz is used, or some portion thereof, with few exceptions:
• In the...
Xem thêmModulation
Frequency modulation or FM is a form of modulation which conveys information by varying the frequency of a carrier wave; the older amplitude modulationor AM varies the amplitude of the carrier, with its frequency remaining...
Xem thêmConsumer use of FM transmitters
In some countries, small-scale (Part 15in United States terms) transmitters are available that can transmit a signal from an audio device (usually a...
Xem thêmIn 2017, Norway became the first country so far to completely switch to Digital audio broadcasting, the exception being some local stations remaining on FM until 2022, and might be extended to
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The FM broadcast band is a range of radio frequencies used for FM broadcasting by radio stations. The range of frequencies used differs between different parts of the world. In Europe and Africa (defined as International Telecommunication Union (ITU) region 1) and in Australia and New Zealand, it spans from 87.5 to 108 megahertz (MHz) - also known as VHF Band II- while in the Americas (ITU regio…
Wikipedia · Nội dung trong CC-BY-SA giấy phépPhát thanh FM – Wikipedia tiếng Việt
FM broadcast band - Wikipedia
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