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Communication Systems

Q1: In AM, the modulation envelope has a peak value double the unmodulated carrier level, when the modulation is

A 25%

B 33%

C 50%

D 100%

ANS:D - 100%

If Amplitude of unmodulated signal=Amplitude of the carrier, then Modulation = 100%.

And if Amplitude of unmodulated signal=2*Amplitude of the carrier, then Modulation=200%.
So, the answer should be 200%.



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