1. A PRESENTATION ON
CRO
(Cathode Ray Oscilloscope)
Sr.No. Name of students Roll No.
1 Krishna T. Korankar 21EE132
2 Ishwar S. Gurnule 21EE125

2. INDEX :-
• Oscilloscope
• Types Of Oscilloscope
• Working Of Oscilloscope
• Cathode ray Tubes The interior of a cathode-
ray tube for use in an oscilloscope
• A Tektronix model 475A portable analog
oscilloscope
• Use & Advantages

3. WHAT IS OSCILLOSCOPE :-
• An oscilloscope is a laboratory
instrument commonly used to display and
analyze the waveform of electronic
signals. In effect, the device draws a graph
of the instantaneous signal voltage as a
function of time.

4. TYPES OF OSCILLOSCOPE :-
• Dual Beam
• Analogue Storage
• Digital Oscilloscope
• Digital Storage
• Digital Snapping
• Digital Phosphor
• PC Based
• Mixed

5. CATHOD RAY OSCILLOSCOPE :-
• A cathode ray oscilloscope is a very important
electronic measuring Instrument.
• It is used to display and measure electrical
signals, Time intervals and phase shift between
two electrical signals non electrical Quantities
such as Pressure, strain and temperature can be
measured by first converting them into an
equivalent voltage using appropriate Transducer.
The internal section of an oscilloscope Vary
depending on the model and manufacturer.

6. SEVEN MAJOR SECTIONS OF CRO :-
1. Cathode ray Tube(CRT)
2. Time Base Circuit
3. Trigger Circuit
4. Vertical Deflections System
5. Horizontal Deflections System
6. High voltage Power Supply And,
7. Low Voltage Power Supply

7. CATHODE RAY TUBES :-
• Originally all oscilloscopes used cathode ray
tubes as their display element and linear
amplifiers for signal processing.
• But modern oscilloscopes can have LCD or
LED screens.
• Fast analog-to-digital converters and digital
signal processors.

8. THE INTERIOR OF A CATHODE-RAY TUBE
FOR USE IN AN OSCILLOSCOPE :-

9. • The cathode ray tube (CRT) is a vacuum tube
containing an electron gun (a source of
electrons) and a fluorescent screen, with
internal or external means to accelerate and
deflect the electron beam, used to create
images in the form of light emitted from the
fluorescent screen.

10. A TEXTRONIK MODEL 475A PORTABLE
ANALOG OSCILLOSCOPE, A VERY TYPICAL
INSTRUMENT OF THE LATE 1970S :-

11. DIAG. OSCILLOSCOPE:-
• A typical oscilloscope has a display screen,
numerous input connectors, and control knobs
and buttons on the front panel.

12. USES:-
• Observe the exact wave shape of an
electrical signal.
• Measurement of voltage and current.
• Measurement of phase and frequency.
• In addition to the amplitude of the two
signal.
• Oscilloscope can show distortion and
measure frequency...

13. ADVANTAGES
• One of the advantages of a scope is that it can
graphically show signals: where a voltmeter
may show a totally unexpected voltage.
• Distortion is very small.
• Very fast instrument.
• Storage scopes are helpful for “capturing” rare
electronic events that cause defective
operation.

14. REFERENCES:-
• http://en.wikipedia.org/wiki/Oscilloscope
• http://www.veenakumari.in/?q=node/22
• Engineering Physics: Fundamentals & Modern
Applications
By P. Khare, A. Swarup(Page No:-74)
• http://searchciomidmarket.techtarget.com/defini
tion/oscilloscope