Question

The carrier wave is given by:
$c(t)=2\sin 8\pi t$ (in volt)
The modulating signal is a square wave as shown in the figure.

Find modulation index.

Answer 1

Answer: 0.50

Here, $c(t)=2\sin 8\pi t$ (in volt)
Therefore, amplitude of the carrier wave, $E_c=2V$
From the figure, the amplitude of the modulating signal, $E_m=1V$
Therefore, modulation index,
$\mu =\frac{E_m}{E_c}=\frac{1}{2}=0.5$