An oscilloscope is a very widely used electronic measuring instrument. It can transform electrical signals that are invisible to the naked eye into visible images, which is convenient for people to study the changing process of various electrical phenomena. The oscilloscope uses a narrow electron beam composed of high-speed electrons to hit a screen coated with a fluorescent substance to produce a small light spot. Under the effect of the measured signal, the electron beam is like the tip of a pen, and the curve of the instantaneous value of the measured signal can be drawn on the screen. Using an oscilloscope, you can observe the waveform curves of various signal amplitudes changing with time, and you can also use it to test various electrical quantities, such as voltage, current, frequency, phase difference, and amplitude adjustment.
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