1. CATHODE RAY
OSCILLOSCOPE
Prepared by-
RAKESH YADAV

2. TOPICS COVERED :
• Introduction
• History
• Advancement
• Block diagram
• Detailed description
• Multi –Input Oscilloscope
• Types of Oscilloscope
• Application

3. HOW A CRO LOOKS LIKE

4. INTRODUCTION TO CRO
• Versatile electronic instrument giving visual
display of signals
• Used for measurement of frequency , amplitude,
phase etc.
• Also used in determining the nature and
characteristics of various components.
• Has a high bandwidth range thus making it a
sensitive and accurate device.
• Easier to use as the internal routine act as a
guide to the user.

5.  History
• Hand-drawn oscillograms:
The earliest method of creating an image of a
waveform was through a laborious and painstaking process of
measuring the voltage or current of a spinning rotor at specific points
around the axis of the rotor, and noting the measurements taken with
a galvanometer.

6.  Advancement:
Automatic paper-drawn oscillograph

7. Cathode ray tubes

8. Tektronix

9. OSCILLOSCOPE:
The device which convert any electrical signal to
visual.(waveform)
The graph, usually called the trace, is drawn by a beam of electrons striking
the phosphor coating of the screen making it emit light, usually green or blue.
This is similar to the way a television picture is produced.

10. BASIC DIAGRAM

11. ANOTHER SCOOP….

12. WORKING OF A CRO

13. The main parts of Cathode
Ray Tube are:
•Electron Gun Assembly
•Focusing Anodes
•Deflection Plates Assembly
•Screen for CRT

23. Multi-Input Oscilloscope
Oscilloscope can have multiple input and display
facilities.

24. The most common one is of - TWO INPUTS
.
Although FOUR and EIGHT inputs are
available for special applications

25. Types of oscilloscope:
• Single beam oscilloscpe:

26. • Dual beam oscilloscope:

27. WHY DUAL TRACE?
Unlike single trace oscilloscope , dual trace oscilloscope can display two traces
on the screen, allowing you to easily compare the input and output .
FOREXAMPLE: input and output of an amplifier.

28. Amplifier input Amplifier output

29. Input and output comparison on DTO

30.  Typical Applications:
Troubleshoot electrooptical and electrical systems.
Observe a triggered event separately or relative to the
trigger itself.
Use with analog light meter output to visualize
intensity of a source.
Check response of a silicon, InGaAs, or avalanche photo
diode.
Analyze signals produced by function generators.
Evaluate system performance.