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Communication Systems

Q1: If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of

A 2

B 3

C 4

D 6

ANS:C - 4

Doubling of frequency increase SNR in frequency modulation by 4. It has no effect in AM.



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