Lectures for Electrical Engineering : CRO


Excerpts From Lecture

Cathode Ray Oscilloscope 

The cathode-ray oscilloscope (CRO) is a multipurpose display instrument used for the observation, measurement, and analysis of waveforms by plotting amplitude along y-axis and time along x-axis. CRO is generally an x-y plotter; on a single screen it can display different signals applied to different channels. It can measure amplitude, frequencies and phase shift of various signals. A moving luminous spot over the screen displays the signal. CROs are used to study waveforms, and other time-varying phenomena from very low to very high frequencies. The central unit of the oscilloscope is the cathode-ray tube (CRT), and the remaining part of the CRO consists of the circuitry required to operate the cathode-ray tube.

Contents
  • Introduction
  • Components of CRO
  • Block diagram of a CRO
  • Cathode Ray Tube ( CRT )
  • Deflection Systems 
  • Electrostatic Deflection
  • Time -base generators
  • Simple saw-tooth generator & associated waveforms
  • Oscilloscope Amplifiers
  • Frequency response
  • Measurements using CRO
  • Lissajous pattern
  • Worked out Problems

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