Joke Collection Website - Bulletin headlines - What does the short wave on the radio mean?
What does the short wave on the radio mean?
The most common are frequency modulation and amplitude modulation.
FM, also known as ultrashort wave broadcasting, has the shortest wavelength, almost straight-line signal propagation, the most stable signal, the best sound quality and the smallest coverage. Basically covering a city or some surrounding urban areas, the frequency of electromagnetic waves is similar to that of TV, so some radios have the function of receiving TV sounds.
AM medium wave, in the past, should have the most contact with medium wave radio stations, covering a larger area than FM, and will receive more stations at night, and the eastern region can sometimes receive medium wave broadcasts from Taiwan Province Province, Hongkong and Japan.
SW is an international broadcast, and listening to it depends on it! Its coverage is naturally the largest.
SW is usually divided into seven bands, plus AM and FM are nine bands, and the range of short wave is extended to nine bands, so there are twelve bands, that is, full-frequency radio!
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