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Deviation/Frequency of Modulation...times penis...

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Q: What is the formula to find the modulating index?
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When modulating freq is doubled then modulating index is halved and modulating voltage remains constant system is?

It's Angle modulated system where the amplitude remains constant & frequency & phase varies with respect to modulating signal.


When signal amplitude is equal to carrier amplitude then modulation index is?

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When modulation frequency is double the modulation index is halF and the modulating voltage remains constant the modulation system is?

frequency modulation..


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When modulation frequency is doubled the modulation index is halved and the modulating voltage remains constant the modulation system is?

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Define modulation and modulation index?

a measure of the degree of frequency modulation expressed numerically for a pure tone modulation as the ratio of the frequency deviation to the frequency of the modulating signal.


Why large value of modulation index is undesirable?

Modulation index(m) is given by the formula (|x(t)max|)/v, where x(t) is the modulating signal and v is the maximum carrier voltage. so m will be greater then 1 if x(t) is greater then v. This results in overlapping of upper and lower wave in the output signal which is called diagonal clipping and this information is lost and thus greater value of m is undesirable.