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A(m)/A(c)=0.5 is known as 50% modulation index. where, A(m)=amplitude of message signal A(c)=amplitude of carrier signal
AM: amplitude modulation
Americum; Amplitude Modulation; Ante Meridiem...
It is a way to see differentences between items. Like: Cow is to barn as elephant is to zoo.
AM is already an acronym for "amplitude modulation", a system where a radio wave carries a signal by varying the amplitude of the wave. It is opposed to FM or "frequency modulation" where the signal is carried by variations in the wave's frequency. AM should not be confused with the acronym am which stands for "ante meridionem", a Latin phrase meaning "before noon".