The technique of adding a precise amount of time between the trigger point and the beginning of the scope sweep in a CRO is known as

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BPSC AE Paper 5 (Electrical) 25 Mar 2022 Official Paper
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  1. free running sweep
  2. delayed sweep
  3. triggered sweep
  4. non-sawtooth sweep

Answer (Detailed Solution Below)

Option 2 : delayed sweep
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Delay Circuit in CRO:

  • The technique of adding a precise amount of time between the trigger point and the beginning of the scope sweep in a CRO is known as the delayed sweep.
  • The input signal is not directly applied to the vertical plates because the part of the signal gets lost when the delay time is not used.
  • Therefore, a delay line is placed between output of vertical amplifier and y input of cathode ray tube, to delay incoming unknown signal.
  • The 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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