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Message: <blockquote data-quote="maylar" data-source="post: 8269919" data-attributes="member: 541144">You need to set the vertical sensitivity to match the signal voltage of what you're measuring. The top menu item "VD" is volts per division. Pressing the left or right arrows will change the sensitivity.Be aware that the scope displays peak-to-peak, which is 2.82 times the RMS voltage. There is also a X1/X10 switch on the probe - the X10 position will lower the amplitude by a factor of 10.So if you are trying to measure 40 VRMS it will show about 113 v peak-peak. For the waveform to fit on the screen you need to set the X10 switch on the probe and the vertical sensitivity to 20V per division.</blockquote>

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