The document describes the cathode ray oscilloscope (CRO), emphasizing its function for displaying, measuring, and analyzing waveforms. It outlines the internal structure of the cathode ray tube (CRT), including components like the electron gun, deflection plates, and phosphor screen. Key functionalities of the CRO involve the manipulation of electron beams to produce visual waveforms on the display.

1. 1
Cathode Ray Oscilloscope
• For display, measurement and analysis of
waveform

2. 2
• Very fast X-Y plotters (Lissajous pattern)

3. 3
Cathode Ray Tube (CRT)

4. 4
Photograph of electron gun
Vertical
Deflection
Plates
Accelerating
Anode
Preaccelerating
Anode
Focusing
Anode
Control
Grid
Heater
Cathode
Internally coated
with conducting
material (Aquadag)

5. Internal Structure of CRT
H.T. supply
heater
supply
y plates
x plates
+-
phosphor
screen
anode

6. H.T. supply
heater
supply
y plates
x plates
+-
phosphor
screen
anode
electron gun
produces a beam
of electrons light produced
on the screen by
electron beam
a p.d. across the y-
plates deflects the
trace vertically
a p.d. across the x
plates deflects the
trace horizontally
Function of Components of CRT

7. 7