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Is Our Children Learning Part II: All radioactivity is man-made.
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Posted 2008-04-16, 11:53 AM in reply to
Willkillforfood
's post starting
"Nah, but the surface of earth is..."
Nope.
FM is frequency modulation. The amplitude of the output signal is dependant on the dominant frequency of the broadcast frequency at the moment (the broadcast frequency varies within a certain range on purpose).
AM is amplitude modulation. The amplitude of the output signal is dependant on the amplitude of the signal at the broadcast frequency at the moment.
AM equipment is much simpler since you just have to tune to that frequency and your signal strength is your output signal, whereas FM you have to track the frequency change. FM is clearer because it's less vulnerable to noise and differences in station distance.
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