Qstnid -5- 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%? - 15: Communication Systems - Neet-xii-physics

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NEET-XII-Physics

15: Communication Systems

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#5
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%?

Ans : Amplitude of the carrier wave, A_c = 12 V

Modulation index, m = 75% = 0.75

Amplitude of the modulating wave = A_m

Using the relation for modulation index: