Compare AM with FM with respect to following points: a) Definition. b) Modulation index. c) Bandwidth. d) Side band.
Parameters
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AM
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FM
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Definition
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It is the process in which the amplitude of carrier signal is varied in accordance with the instantaneous value of modulating signal keeping frequency and phase constant.
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It is the process in which the frequency of carrier signal is varied in accordance with the instantaneous value of modulating signal keeping amplitude and phase constant.
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Modulation index
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The value of modulating index is less than or equal to 1
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The value of modulating index is always greater than 1
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Bandwidth
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Twice the highest modulating frequency.
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Twice the sum of the modulating signal frequency and the frequency deviation.
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Side band
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There are two sidebands
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Infinite number of sideband
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