Due to waveform distortion, the vertical displacement or the ↑↓ button should be adjusted to make the whole waveform translate, thus making the waveform complete; Vertical displacement or ↑↓, attenuation or attenuation adjustment, y gain;

If the positive and negative half cycles of the sine wave are beyond the range of the screen, you should adjust the attenuation or attenuation adjustment button or the Y gain button, or use them together, so that the whole waveform of the sine wave can be compressed and the waveform can appear on the screen completely; Scanning range, 1k gear, scanning fine adjustment.

Extended data:

The deflection system of oscilloscope tube is mostly electrostatic deflection type, which consists of two pairs of parallel metal plates perpendicular to each other, called horizontal deflection plate and vertical deflection plate respectively. Respectively controlling the movement of the electron beam in the horizontal direction and the vertical direction.

When electrons move between the deflection plates, if no voltage is applied to the deflection plates, there will be no electric field between the deflection plates, and the electrons entering the deflection system after leaving the second anode will move along the axial direction and shoot at the center of the screen. If there is a voltage on the deflection plates, there will be an electric field between the deflection plates, and the electrons entering the deflection system will be emitted to the designated position of the fluorescent screen under the action of the deflection electric field.

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