Tenma 72-10175 User Manual page 41

Digital oscilloscope
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Click "Probe" in Vertical Setup window to select the probe attenuation
The probe setting window in the sidebar
Note: The attenuation factor changes the vertical scale of the oscilloscope so that the
measurement results reÀect the actual voltage levels at the probe tip.
Invert
The invert function turns the displayed waveform 180 degrees, with respect to the
ground level. When the oscilloscope is triggered on the inverted signal, the trigger is also
inverted.
Click "Invert" in Vertical window
The following picture shows the waveform before inversion:

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