What frequency range does the unites states use for FM broadcasting?

Answer 1

The range of a radio wave at higher frequencies becomes line-of-sight much past 50MHz or so. The higher frequencies are not reliably reflected by the ionosphere.

The type of the modulation (FM, AM, pulse code etc) does not affect the range of a radio wave.

As an FM signal gets weaker furthest from the transmitter, the background hiss caused by the discriminator gets louder, reducing the intelligibility.

AM and SSB are favoured by amateurs, as it is easier to hear a very weak signal. Not exactly HiFi though.

Answer 2

It depends on from which country the signal is broadcasting .

In general it is the range of kilo to mega Hz.

usually, throughout the world 87.5 MHz to 108.0 MHz is used .

A2

The range of any RF signal is dependant on the power output, the height and efficiency of the aerial. So there is no information to give you an answer.

The difference between FM and AM, is that FM has the 'capture effect'. This is where the strongest signal wins, at the receiver.

AM signals on the same frequency, will compete and beat together, so you will hear both stations at the receiver.

FM signals at the receiver will detect the strongest signal and supress a weaker signal on the same frequency, so you only hear the stronger signal.

If you are tuning into a weak FM signal, the background hiss will increase with range until you cannot hear the signal over the noise.

FM is more desirable for quality signals containing music, at close range.

AM suffers more from other stations but does not get noisey with range, so weak communications can be heard at a greater range. This is desirable for communications.

Answer 3

the range of AM Signal is 522 to 1680 khz

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