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Pocket-Sized 6 GHz 1 TS/s ET Scope
joeqsmith:
So the weights now come out correctly. Least squares fit?
SJL-Instruments:
--- Quote from: joeqsmith on January 30, 2024, 01:50:54 am ---So the weights now come out correctly. Least squares fit?
--- End quote ---
Run some actual CDF data (e.g. the data in example 4.3.2). Fit InvGauErr on the y axis versus voltage on the x axis, with the computed weights. You'll get a straight line intersecting the x axis. The intersection point is the voltage you want.
joeqsmith:
If you get the same results, the next question I have is there any difference between this and what your software is doing?
It's too bad but I really don't see a future for LabView.
SJL-Instruments:
--- Quote from: joeqsmith on January 30, 2024, 02:11:56 am ---If you get the same results, the next question I have is there any difference between this and what your software is doing?
--- End quote ---
Looks good to us. This is exactly what the software implements.
We also have a check that the extracted fit voltage lies between the 25th and 75th percentile of the CDF. If not, we revert to using the interpolation method. This only matters at low triggers/sample or samples/cdf, when the data is very noisy and the fit might blow up.
If you keep Nmax above 500 and K above 20, this shouldn't be an issue.
joeqsmith:
Painful for you I'm sure but I appreciate you hanging in there.
Also, this entire time I have been running tests looking for a single glitch using your software (and not touching the screen) and everything is clean. I tried all sorts of settings.
I think the next step is to roll the fitter into my software and see if it remains stable.
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