Which modulation is good for Radio Broadcasting.
AM(Amplitude Modulation) or FM(Frequency Modulation)?
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Either of them may be considered "good" dependent on the service provided.
In the medium frequency broadcast band (535kHz to 1700kHz) a.m. is chosen because of its relatively narrow bandwidth - about 8kHz, so that many stations can operate in that band.
In the v.h.f. broadcast band (87.5MHz to 108MHz) f.m. is used so that the wider bandwidth necessary for reasonably good transmission of music, plus a 38kHz sub-carrier for stereo transmission, may be used.
In the aeronautical v.h.f. band, a.m. is used. This is to avoid what is called the "capture effect" of a stronger f.m. transmission overriding a weaker one, which could mean that a weak signal from an aircraft in distress might not be heard.
So, both a.m. and f.m. are "good" for broadcasting.
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Answer / ashutosh mishra
Both the Modulation technologies are good for broadcasting and having their own advantages and disadvantages.
AM is conventional method of broadcasting.
With AM broadcasting (MW & SW)large distance can be covered but the interference of noice is increased with distance.
FM can be received in limted area only and can not be transmitted over long distance.Quality of Reception in FM is good in comparision to AM.
In television broadcasting both AM and FM are used simultaniously,one for picture and other for sound.
In india AM is used for picture and FM is used for sound.
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frequency modulation is best for radio broad casting.
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