Carson's rule for calculation of bandwidth of FM signal

Q.  Carson's rule is used to calculate
- Published on 14 Oct 15

a. Bandwidth of FM signal
b. Signal to noise ratio
c. Modulation index
d. Noise figure

ANSWER: Bandwidth of FM signal
 
According to Carson s rule, the bandwidth required is twice the sum of the maximum frequency deviation and the maximum modulating signal frequency. Or,
B=2(Δf +fm) Hz.

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