Modulation Index

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Modulation index
The modulation index (or modulation depth) of a modulation scheme describes by how much the modulated variable of the carrier signal varies around its unmodulated level. It is defined differently in each modulation scheme. See:Amplitude modulation indexFrequency modulation indexPhase modulation index
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modulation index
In angle modulation, the ratio of the frequency deviation of the modulated signal to the frequency of a sinusoidal modulating signal. (188 ) Note: The modulation index is numerically equal to the phase deviation in radians.


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