What is the purpose of the trigger circuit in a Cathode Ray Oscilloscope (CRO)? 

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SSC JE Electrical 4 Dec 2023 Official Paper II
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  1. To generate the electron beam 
  2. To synchronise the horizontal and vertical deflections 
  3. To control the power supply circuit 
  4. To amplify the input signal 

Answer (Detailed Solution Below)

Option 2 : To synchronise the horizontal and vertical deflections 
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Detailed Solution

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The correct answer is option "2"

Explanation:

  • The trigger circuit in a Cathode Ray Oscilloscope (CRO) serves the crucial role of synchronizing the horizontal and vertical deflections of the electron beam.
  • It ensures the stable and repetitive display of input signals by triggering the start of each sweep at a specific point in the input signal waveform.
  • This synchronization allows for a clear and stable representation of the waveform on the screen, making it easier to analyze and measure electrical signals accurately in both time and amplitude domains.
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