The document discusses the cathode ray oscilloscope. It describes the cathode ray oscilloscope as an electronic voltmeter used to display and measure peak voltage, frequency, phase difference, pulse width, delay time, rise time, and fall time. It outlines the topics of cathode ray tube construction, electrostatic lens, electrostatic deflection, and phase and frequency measurement. Lissajous patterns are discussed for measuring phase differences and frequencies.

1. Electrical and Electronic Measurement
Cathode Ray Oscilloscope
Parveen Malik
Assistant Professor
School of Electronics Engineering
KIIT University
parveen.malikfet@kiit.ac.in
October 30, 2019
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2. Outline
1 Cathode Ray Oscilloscope
2 Cathode Ray Tube - Construction
3 Electrostatic Lens
4 Electrostatic Deflection
5 Phase and Frequency Measurement
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3. Cathode Ray Oscilloscope

4. Cathode Ray Oscilloscope
Cathode Ray Oscilloscope is an electronic voltmeter.
Applications - To display and measure Peak voltage, Frequency,
Phase difference, Pulse Width, Delay Time, Rise Time,Fall
Time.
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5. Cathode Ray Tube - Construction

6. Cathode Ray Oscilloscope
CRT Construction
Cathode Ray Tube
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7. Cathode Ray Oscilloscope
CRT Construction
CRO Block Diagram
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8. Cathode Ray Oscilloscope
Electron Lens
Electrostatic Lens
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9. Electrostatic Deflection

10. Electrostatic Deflection
Electrostatic Deflection
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11. Phase and Frequency
Measurement

12. Phase and Frequency Measurement
Lissajous Pattern - Equal Frequency
(a) (b)
Phase difference (a) φ = 0◦
(b) φ = 180◦
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13. Phase and Frequency Measurement
Lissajous Pattern- Equal Frequency
(a) (b)
Phase difference (a) φ = 90◦
(b) φ
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14. Phase Measurement
Lissajous Pattern
Lissajous Pattern for different phases
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15. Frequency Measurement
Lissajous Pattern- Different Frequency
Lissajous pattern with frequency ratio 2:1
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16. Frequency Measurement
Lissajous Pattern- Different Frequency
(a) (b)
(c)
Lissajous pattern with (a) Different frequency ratio (b) Half tangencies (c)
Frequency measurement
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