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Amplitude of a Wave

A carrier wav...

Question

A carrier wave of peak voltage 20 V is used to transmit a message signal. what should be the peak voltage of the modulating signal, in order to have a modulating index of 80%?

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Solution

Modulation index = $\frac{P e a k v a l u e o f m o d u l a t i n g s i g n a l}{P e a k v a l u e o f c a r r i e r s i g n a l}$

Hence ,

Peak value of modulating signal = ( Modulation index ) ( Peak value of carrier signal )

= $\frac{80}{100} \times 20$

$= 16 V$

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Amplitude of a Wave

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