2007-03-13 20:48:35 · 6 answers · asked by e r 1 in Science & Mathematics ➔ Engineering
variation of the amplitude of a carrier wave (commonly a radio wave) in accordance with the characteristics of a signal, such as a vocal or musical sound composed of audio-frequency waves.
2007-03-13 20:51:21 · answer #1 · answered by richard_beckham2001 7 · 0⤊ 0⤋
Amplitude modulation means that the amplitude (strength) of the carrier wave is varied by the changes in the modulating signal.
HTH âº
Doug
2007-03-13 20:58:35 · answer #2 · answered by doug_donaghue 7 · 0⤊ 0⤋
layman's definition:
amplitude: the peak of the wave form
modulation: a way of encoding a signal
so amplitude modulation (am) is encoding a signal by varying the wave form peaks (think sine wave where instead of peaking at 1, it peaks at 1 once, then at 3, then at 2...)
fm is encoding by varying the frequency (how often you send out the signal)
pm is encoding by varying the phase.
2007-03-13 20:59:00 · answer #3 · answered by contemplating 5 · 1⤊ 0⤋
Short for [AM] it is a technique used in electronic communication, most commonly for transmitting info. via a radio carrier wave. AM works by varying the strength of signal sent in relation to the info. sent .
2007-03-13 20:59:42 · answer #4 · answered by hotdiggitydog 1 · 0⤊ 0⤋
I see you have many questions about radio transmitters/receivers It may be worth looking in your local bookstore or on line for something like 'the idiots guid to' or 'beginners guid to' I am not being nasty when I say that. The idiots guide series are excellent for beginners in many subjects
2007-03-13 21:11:02 · answer #5 · answered by Dreamweaver 4 · 0⤊ 0⤋
am
2007-03-13 20:50:25 · answer #6 · answered by Anonymous · 0⤊ 0⤋