Which of the following function is performed by \( \mathrm{P} \) de...

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Which of the following function is performed by
\( \mathrm{P} \) demodulator

W
(1) Selecting the desire signal and rejecting the unwanted signals.
(2) Amplifying and demodulating the desired signal
(3) Displaying the original modulating signal
(4) All of these
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