1.

Delay line is essential in a CRO, to ensure that1. Vertical signal starts after the retrace period of sweep signal2. The sweep reaches the horizontal plates before the desired signal under consideration3. Initial part of signal to be observed is not lost4. All of the above

Answer» Correct Answer - Option 3 : Initial part of signal to be observed is not lost

A delay line is placed between output of vertical amplifier and y input of cathode ray tube, to delay incoming unknown signal.

Purpose of delay line is to synchronize unknown signal with sweep signal such that complete signal portion will be displayed without any loss.


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