A modulating signal is a square wave, as ...

NCERT Class XII Chapter
Communication Systems
Questions With Solutions

Question : 6 of 8

Marks: +1, -0

A modulating signal is a square wave, as shown in Figure.

The carrier wave is given by c(t) = 2sin(8πt) volts

(i) Sketch the amplitude modulated wave form

(ii) What is the modulation index?

Solution:

(i) The amplitude modulated wave is shown here :

(ii) Modulation index, µ =

\frac{A_m}{A_c}

\frac{1V}{2V}

= 0.5

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