Discussion
Which part is called as heart of CRO ?
Answer: A
The heart of a CRO is the CRT, the cathode ray tube.
In a cathode ray oscilloscope, the CRT produces the display: an electron gun generates and focuses a beam, deflection plates move it horizontally and vertically according to the time base and the input signal, and the beam strikes a phosphor screen to draw the waveform. All other sections exist to drive the CRT.
The sweep (time base) generator provides the horizontal deflection voltage, the trigger circuit synchronises the sweep with the signal, and the vertical amplifier scales the input signal for the deflection plates. Each is essential, but they serve the CRT.
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