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Amplitude of a Wave

A message sig...

Question

A message signal of peak voltage $20 V$ is used to modulate a carrier wave of peak voltage $30 V$ . Determine the modulation index.

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Solution

The modulation index is the ratio of modulating signal voltage to the carrier wave peak voltage.
That is, $m = \frac{V_{m}}{V_{c}}$
$= \frac{20 V}{30 V} = 0.66$

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Amplitude of a Wave

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