Question

A carrier wave of peak voltage 12 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?

Answer 1

Here, `A_c = 12 V, A_m = ? Mu - 75% = 0.75`
From `mu = A_m/A_c`
`A_m = mu xx A_c = 0.75 xx 12 = 9 V`.