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Scan Operation Voltage




When the input vertical is 0V, the electron beam can be positioned in the vertical center of the screen. If 0V is also applied to the horizontal input, then the beam is at the center of the CRT faceplate and remains as a stationary point. The controls allow vertical and horizontal move the point to anywhere on the face of the tube. Any DC voltage applied to an input result in a displacement of the point.



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