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Praveen Singh • 35.44K Points
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Q. The return to zero waveform consists of

(A) unipolar rz
(B) bipolar rz
(C) rz-ami
(D) all of the mentioned
Correct : Option (D)

Explanation: 
 different types of return to zero waveforms are unipolar rz, bipolar rz, rz- ami. these are used in baseband transmission and in magnetic recording.

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