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Correcting for low freq roll-off

 
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rhbrown



Joined: 28 Dec 2011
Posts: 1

PostPosted: Wed Dec 28, 2011 7:43 am    Post subject: Correcting for low freq roll-off Reply with quote

Wondering whether there is an easy way to correct a data set for a known first-order low freq roll-off? For example, I have a scope trace where I know the measurement time constant was 100 s (high-pass RC filter), and I would like to see what the "true" DC-coupled signal would look like.

Clearly I could model the high-pass filter, generate an FFT, "invert it", process and IFFT the data, but it would be a very useful feature if this could be offered as a feature within DPlot filter options! Perhaps this is possible using the user-defined filter - if anyone knows how to do this, I'd appreciate any tips - thanks!
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