1.

In FM signal with a modulation index mf is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of A. mf B. 3mf C. mf/3 D. mf/9

Answer»

B. 3mf 

Frequency multiplier increase the deviation,

β = Δf/fm 

If multiplied by three,3 β = 3Δf/fm



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