Describe the construction and working of a cathode ray oscilloscope?

Question: Describe the construction and working of a cathode ray oscilloscope?

A cathode ray oscilloscope, or CRO for short, is a device that can measure and display various electrical signals. It consists of a cathode ray tube, which is a glass tube with a vacuum inside. The tube has two electrodes: a cathode, which emits electrons, and an anode, which attracts them. The electrons form a beam that travels from the cathode to the anode. The beam can be deflected by applying electric or magnetic fields to the tube. The deflected beam hits a phosphor screen at the end of the tube, creating a bright spot of light.

The CRO can be used to measure the voltage, frequency, phase and shape of an electrical signal. To do this, the signal is connected to the input terminals of the CRO. The signal is then amplified and fed to the vertical deflection plates of the tube, which control the vertical position of the beam. The horizontal position of the beam is controlled by a time base generator, which produces a sawtooth wave that sweeps the beam from left to right at a constant speed. The result is that the beam traces out the shape of the signal on the screen, creating a waveform. The waveform can be analyzed by using various controls on the CRO, such as amplitude, time base, trigger and focus.

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