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Overmodulation results in ________________

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Overmodulation results in ________________

(a) Distortion

(b) Weakens signal

(c) Strengthens the signal

(d) provides immunity to noise

I got this question in final exam.

Asked question is from Power Relations in AM Waves in portion Amplitude Modulation of Analog Communications

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Best answer
Correct choice is (a) Distortion

Easiest explanation: When instantaneous level of modulating signal exceeds the value necessary to provide 100% modulation, the signal is said to over-modulated. In other words, when modulation index is greater than 1, it results in Overmodulation. Thus, Overmodulation results in distortion of the modulating signal.

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