index of modulation

- A measure of the degree of modulation, usually involving the ratio of a peak variation to a steady non-peak value. The result may be multiplied by 100 to obtain a percentage.
- In frequency modulation, the ratio of the peak variation of the
__carrier wave__frequency, to the frequency of the modulating signal. The result may be multiplied by 100 to obtain a percentage. - In
__amplitude__modulation, the__peak amplitude__variation of the composite__wave__, to the unmodulated carrier amplitude. The result may be multiplied by 100 to obtain a percentage. - In
__amplitude__modulation, the ratio of half the__difference__between the__maximum__amplitude and__minimum__amplitude, to the__average__amplitude. The result may be multiplied by 100 to obtain a percentage.

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