Well, today I will talk about the operation of cathode ray oscilloscope.
On an oscilloscope, the electron beam is deflected horizontally by a voltage sweep, and vertically voltage to be measured. While the electron beam is moved across the face of the CRT by one horizontal scanning signal, the input signal does not deflect vertically, allowing a view of the waveform of the input signal. One scan of the beam across the face of the tube, followed by a period "inactive", during which the beam is turned off while returning to the starting point. Constitutes a scanning beam.
A stationary exposure is obtained when the beam sweeps repeatedly the tube, with exactly the same image every scan. This requires a synchronization, starting the sweep at the same point in a cycle of repetitive waveform. If the signal is synchronized properly, the exhibition will be stationary. In the absence of synchronization, the image will appear to move or move horizontally on the screen.
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