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Question

The frequency spectrum of a signal is shown in the figure. If this is ideally sampled at intervals of 1 ms, then the frequency spectrum of the sampled signal will be

A
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Solution

The correct option is A

Given that, sampling interval = 1 msec
i.e Ts=1 msec=103sec
Therefore sampling frequency
Fs=1Ts=1103=1kHz
after sampling new signal in frequency domain
UT(f)=1Tsn=U(fnfs)
Spectrum of sampled signal will be

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