electrical mesuring and measurement instruments, Study notes of Electrical Engineering

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CATHODE RAY

OSCILLOSCOPE WORKING

AND APPLICATIONS

B.Tech Electrical Engineering IV Sem

Electrical Measurement & Measuring

Instruments

(EEE-412) Unit-IV

TOPICS COVERED :

Introduction to CRO

Block diagram of CRO

Detailed description of

CRT

Multi –Input Oscilloscope

Lissajous Patterns

Application

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.

BASIC DIAGRAM

WORKING OF A CRO

THE MAIN PARTS OF

CATHODE RAY TUBE

ARE:

• Electron Gun Assembly
• Focusing Anodes
• Deflection Plates Assembly

Screen for CRT

The most common one is of - TWO INPUTS

.

Although FOUR and EIGHT inputs are

available for special applications

SOME EXAMPLES OF

LISSAJOUS FIGURES……..

 With the help of lissajous figures we

can measure…….

 Frequency

 Phase

Phase

Measuremen

t

sin Ф =

c/b

A N A L O G S T O R A G E

O S C I L L O S C O P E