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LCR Impedance Viewer for Picoscope+Keysight+R&S Bode Plot Data (open source)
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Hans Polak:
Hi Wim,

Thanks for replying so rapidly.
Two questions:

1) What do you mean with calibrations calculations. Would this be to assess the load of the probe and to verify the value of the used measuring resistor ?
I won't need all this.

2) Since I'm not a programmer would it help when I provide you with the math, where the probe's capacity is now also part of the equation, to calculate the DUT's exact impedance, inductance and capacitance ?

Kindest Regards,
Hans
_Wim_:

--- Quote from: Hans Polak on May 10, 2021, 01:32:14 pm ---1) What do you mean with calibrations calculations. Would this be to assess the load of the probe and to verify the value of the used measuring resistor ?
I won't need all this.

--- End quote ---

Yes, this is what I meant


--- Quote from: Hans Polak on May 10, 2021, 01:32:14 pm ---2) Since I'm not a programmer would it help when I provide you with the math, where the probe's capacity is now also part of the equation, to calculate the DUT's exact impedance, inductance and capacitance ?

--- End quote ---

That might be an option, but no promises. This thread describes what is currently in the code:
https://www.eevblog.com/forum/testgear/rlc-impedance-viewer-for-picoscope-bode-plot-data/msg2238570/#msg2238570

The actual part of the code that does the calculations is here:
https://github.com/WimHuyghe/FRA-Impedance-Viewer/blob/master/FRA_IMP/FRAResult.cs

It should be fairly readable even for a non programmer. Please that this into account when describing the update in the math. Adding an additional input parameter to the GUI is no issue for me, so that can be done easily.
Hans Polak:
O.K. I'll provide the math, then we see what can be done.

Regards,
Hans
Hans Polak:
Wim,
Before going into mathematical detail, may I ask you how many bits are used from Picoscope's options.
My Picoscope 5243B has various bit depth settings from 8 bits to 16 bits.
I don't know whether this is an option that your software can influence, bit more bits will of course result in more accurate results, especially when calculating a capacity.

Hans
_Wim_:

--- Quote from: Hans Polak on May 12, 2021, 02:13:52 pm ---Wim,
Before going into mathematical detail, may I ask you how many bits are used from Picoscope's options.
My Picoscope 5243B has various bit depth settings from 8 bits to 16 bits.
I don't know whether this is an option that your software can influence, bit more bits will of course result in more accurate results, especially when calculating a capacity.

Hans

--- End quote ---

My software uses the data obtained from FRA, I would need to check his source code. But I would guess max resolution is used, but I am not sure.
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