Before using the oscilloscope, you need to adjust or compensate the probe. The probe has a trimmer capacitor that must be adjusted so it doesn't distort the measured signal. To do this, set the probe divider to 10. Apply a 1 kHz square wave to the probe input. Oscilloscopes typically have a 1 kHz generator output, to which the probe is connected
The screwdriver should have an insulated handle. Start turning the capacitor's rotor with the screwdriver and observe the signal on the oscilloscope screen.
If the straight line slopes downwards, it means that low frequencies predominate.
If the line tends to the top, it means that high frequencies predominate.
If the line is straight, then everything is fine and the probe compensation setup is complete. Now you can start taking measurements.
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