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(i) Define modulation index. (ii) Why ...

(i) Define modulation index.
(ii) Why is the amplitude of modulating signal kept less than the amplitude of carrier wave ?

Text Solution

Verified by Experts

(i) Modulation index is defined as the ratio of amplitude of modulating signal and amplitude of carrier wave
Alternatively,
`mu = (A_m)/(A_c)`
(ii) The amplitude of modulating signal is kept less than amplitude of carrier wave to avoid / minimize distortion / noise.
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