Timebase for IN and OUT seems to be different

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jakob
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Joined: Wed Jun 07, 2017 10:29 am

Timebase for IN and OUT seems to be different

Post by jakob » Wed Jun 07, 2017 11:25 am

I have a test setup for low frequencies (ca 1Hz) with a STEM 125-10, 0.97-24.
I just want to compare a generated signal to a processed measured signal.

In the oscilloscope application, when I plot this (see attached image), it seems that the time div for the IN and the OUT do not match. The overlap at the trigger is ok, but before and after the flanks don't match and drift. When increasing the frequency of the signal, the drift decreases.

Another thing which I don't understand is that when I change the time offset for the trigger, it will only move the signal of the IN, not the generated signal. Is this wanted? Makes it pretty hard reliably compare the two signals...

Anything I am missing here?
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