[Kst] Zero calibration
Gunter.Koenigsmann at semikron.com
Fri Feb 6 15:37:31 UTC 2015
Sorry that I disturb you. But I found this exceedingly fast program
that seems to be capable to load any length of data and am now trying
for a long time already to do a seemingly simple thing -
that I am hoping to archieve with it:
I am measuring endless streams of positive and negative pulses that
look like the following:
The problem is that the measuring device only measures the AC part of
the signal. The result of the measurement actually doesn't look bad. But
a closer look shows that at the end of the sequence of positive pulses
the zero level has dropped a little below the actual zero line and ad
the end of the sequence of negative pulses the zero level has moved to a
place slightly above the zero line.
What I therefore need is a dynamical zero level correction. My plan was
to do something like the following:
1.) sample one pixel in every period the signal is near zero. The
frequency of the signal is rather stable so I just could take every nth
pixel and everything would be fine.
2.) connect these pixels by a line. Either a linear line, a spline or
whatever kst offers me.
3.) Subtract the resulting curve from the one I have measured and
declare the result to be the thing that actually happened.
I assumed that there would be a filter that samples only every nth
pixel or a login amp that samples only if the reference signal is below
a certain value or something similar. But I didn't find anything that
Do you have any idea?
Alternatively is there a working link to a place that describes how to
write a plug-in? I would like to avoid having to write additional
software (and I don't have a working build system for windows but would
want to use my plug-in there, if even remotely possible) but would be
willing to, if that is really needed.
Tel: +49 911-6559-6025
Fax: +49 911-6559-776747
gunter.koenigsmann at semikron.com
SEMIKRON Elektronik GmbH & Co. KG
Sigmundstrasse 200, 90431 Nürnberg, Germany
Amtsgericht Nürnberg HRA 13650
SEMIKRON Elektronik Verwaltungs GmbH
Amtsgericht Nürnberg HRB 21338
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