Cro (emmi) (2)
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Transcript of Cro (emmi) (2)
![Page 1: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/1.jpg)
CATHODE RAY
OSCILLOSCOPE
![Page 2: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/2.jpg)
Functional Units
a) Electron Gun
b) Evacuated Tube
c) Deflecting System
d) Time Base
e) Trigger Circuit
![Page 3: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/3.jpg)
Electron Gun
![Page 4: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/4.jpg)
a) Heating Filament
b) Cathode
c) Grid
d) Electron lens
Link to figureReturn
![Page 5: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/5.jpg)
Evacuated Tube
• Vacuum space
• Screen
• Graphite inner wall
• Shielded from electric and magnetic fields
Return Link to figure
![Page 6: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/6.jpg)
Deflecting System
• X-plates
• Y-plates
• X and Y Deflection Amplifiers
• X-shift Control
• Y-shift Control
• Sensitivity Control
Return Link to figure
![Page 7: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/7.jpg)
Time Base
• Sawtooth potential difference
• Time period control
Return Link to figure
![Page 8: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/8.jpg)
Trigger Circuit
• Maintain a stable trace
• Trig level control
• Trigger time base
• automatic triggering
![Page 9: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/9.jpg)
USES OF CRO
a) Voltmeter
b) Display of waveforms
c) Measurement of short time intervals
d) Measurement of frequency
e) Display of phase relationship
f) Comparison of frequencies
![Page 10: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/10.jpg)
Voltmeter
• Calibration
• D.C. voltmeter
• A.C. voltmeter
• Advantages over moving-coil voltmeters
Return
![Page 12: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/12.jpg)
Measurement of Short Time
Intervals
• Calibrate for the time base
• Measure a very small time interval, e.g.
measurement of sound speed in a metal rod
Return
![Page 13: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/13.jpg)
Measurement of Frequency
• Signal applied to Y-plates
• ‘Lock’ the trace
• Choose a suitable time base
• Determine the period, T
• Calculate the frequency
Return
![Page 14: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/14.jpg)
Display of Phase Relationships
Return
Computer
Simulation
![Page 15: Cro (emmi) (2)](https://reader036.fdocuments.in/reader036/viewer/2022073014/55a6490f1a28ab432e8b48de/html5/thumbnails/15.jpg)
Comparison of Frequencies
• Lissajous’ figures
• Frequency ratio