What is the PHYSICAL significance of modulation index? What is the advantage or disadvantage of FM over AM?
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The modulation index (or modulation depth) of a modulation schemes describe by how much the modulation variable the carrier signal varies. Around its unmodulated level. It is defined differently in each modulation scheme .
All the transmitted powers FM is useful while AM most of the transmitted power In carrier which contains no information.
The amplitude of FM is constant which makes it independent of the modulation depth while In AM modulation depth directs the transmitted powers .
All the transmitted powers FM is useful while AM most of the transmitted power In carrier which contains no information.
The amplitude of FM is constant which makes it independent of the modulation depth while In AM modulation depth directs the transmitted powers .
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