Probe calibration.

[doppelfaust]

I finally got my DSO138 functional and went to do probe calibration but the wave form is off the display... I checked my voltages everywhere and they are pretty close to the values they're suppose to be at. I've attached a picture for reference. Any recommendations on how to fix this?

Please be easy on me, this is my first foray into anything more complicated than a standard multimeter.

[amb]

Do a VPOS alignment as detailed in the instructions.

You can reposition the trace vertically using the + and - buttons when you have the vertical position indicator highlighted.

Similarly you can shunt it left and right when the horizontal position indicator is highlighted.

[doppelfaust]

I tried repositioning it but only had enough adjustment to get one side displaying.

I'll try the VPOS alignment tomorrow.

[doppelfaust]

I tried the VPOS alignment but the test wave is still aligned incorrectly. At 1v it looks great but when I have the SEN1 switch set to 0.1v only one side of the wave form can be displayed.

[MaxxB]

Did you manage to move the little triangle on the left side all the way to the bottom? Can you post a photo when it is down, then we can see how much of the wave form is still missing. It might give a clue as to what needs adjusting.

Maxx

[John]

Hello doppelfaust,
in the picture the CPL switch is set to DC.
Please set the CPL switch to AC.