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DSO6014A Oscilloscope ground floating

Question asked by scopeuser on Jun 13, 2012
Latest reply on Jun 14, 2012 by scopeuser
Dear all,

We are having trouble in getting a ground signal (0V) when we connect to the ground on the scope. For some reason when we connect the scope to the internally generated square wave signal and to the scope ground, the ground seems to be floating at about 20mV.
In addition the ground level doesn't change even if the scope ground is connected to an external power-supply ground.

What could be the issue?