The CRO stands for cathode ray oscilloscope. CRO is an electron test instrument , it is used to obtained wave forms when the different input signals are given the oscilloscope observes the changes in the electrical signals overtime. By seeing the waveforms, we can analyze sum properties like ampitude, freqency, rise time, distorchan, time interval etc.
CRO consist of a set of blocks .The function each box of CRO in mentioned below.
1) Vertical ampilifier :-
It ampilifies the input signal , which is to be displayed on the screen of CRT.
2) Delay line :-
It provides sum amount of delay to the signal , which is obtained and the output of vertical ampilifier. This delayed signal is then applied to vertical deflection plates of CRT.
3) Trigger circuit :-
It provides a triggering signal in order to syndronize both horizontal and vertical deflection of electron beam.
4) Time base generator :-
It produces a sawtooth signal sawtooth wave wories linearly
with time and it causes movement of spot on screen with constant velocity.
5) Horizontal ampilifier :-
It ampilifier the sawtooth signal and then connects its to the horizontal deflection plates of CRT.
6) Power supply :-
Power supply produces both high low voltages. high voltage is given negative high voltage to the CRT and low voltage are applied to other circuits. The power supply DC in nature.
7) CRT :-
CRT is the major and important block. it consists of four parts these are electron gun, vertical deflection plates, horizontal deflection plates and fluoresent screen.
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