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A modulating signal is a square wave, as shown in figure,
Question: A modulating signal is a square wave, as shown in figure,The carrier wave is given by  cleft(tright)=2sin left(8mathit{pi t}right)mathit{volts}  (i) Sketch the amplitude modulated waveform  (mathit{ii}) What is the modulation index?
The carrier wave is given by \(c\left(t\right)=2\sin \left(8\mathit{\pi t}\right)\mathit{volts}\)
\((i)\) Sketch the amplitude modulated waveform
\((\mathit{ii})\) What is the modulation index?

Answer

\((i)\) time period of carrier wave, \(T=\frac{2\pi }{8\pi }=0.25s\) ( \(4\) oscillation in \(1\mathit{sec}\) )
from \(0\lt t<0.5\) , amplitude of modulated wave, \(A=A_M+A_C=1+2=3\)
from \(0.5\lt t<1\) , amplitude of modulated wave,   \(A=\left(-1\right)+2=1\)
Answer for A modulating signal is a square wave, as shown in figure,The carrier wave is given by  cleft(tright)=2sin left(8mathit{pi t}right)mathit{volts}  (i) Sketch the amplitude modulated waveform  (mathit{ii}) What is the modulation index?
\((\mathit{ii})\) Modulation index,   \(\mu =\frac{A_M}{A_C}=\frac 1 2=0.5\)
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