I found the solution to the level shifting when printing out a persistence plot. Simply convert the data file to a Bitmap or .jpg file and everything is fine.

I am engaged in the development of pulse induction metal detectors for various applications and recently purchased a 2206B. I am still on a learning curve with this Picoscope but very impressed by its performance so far. Basically, I am looking at the eddy current decay curve from a metal target at ...