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LCR Impedance Viewer for Picoscope+Keysight+R&S Bode Plot Data (open source)
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_Wim_:

--- Quote from: Hans Polak on April 25, 2019, 02:53:16 pm ---The only very very small thing is that you have to start measuring twice.
The first time it contacts the Picoscope and after that you have to press measure again, not very important.

--- End quote ---

Next to the button "abort measurement" you have the option to leave the picocontrol screen open. This way you only need a single mouseclick for each measurement (I guess this is what you want).
Hans Polak:
Wim,
I still noticed a small anomaly. In the Modulus diagram, now having the correct phase, the cursor below the image still gives the phase of the bode diagram.

Then I have a few suggestions concerning noise fighting in noisy pictures, although I have no idea whether or in what way noise fighting is already part of your software Tool.
1) the most simple step would be when testing up to a frequency A, to limit BW of both channels to a BW of 5A or something like that.
The scope's BW in my case of 100mHz, has a noise of 100uV.
When measuring up to 100kHz, BW could be limited to 500kHz, already giving a possible noise reduction of 23dB.
2) Since it is possible to "overlay" several measurements in your program, it would help to reduce noise when they could be averaged.

Kindest regards,
Hans
_Wim_:

--- Quote from: Hans Polak on April 26, 2019, 09:00:12 am ---I still noticed a small anomaly. In the Modulus diagram, now having the correct phase, the cursor below the image still gives the phase of the bode diagram.
 
--- End quote ---
Thanks for spotting this (again). Updated version in first post.


--- Quote from: Hans Polak on April 26, 2019, 09:00:12 am ---1) the most simple step would be when testing up to a frequency A, to limit BW of both channels to a BW of 5A or something like that.
The scope's BW in my case of 100mHz, has a noise of 100uV.
When measuring up to 100kHz, BW could be limited to 500kHz, already giving a possible noise reduction of 23dB.
 
--- End quote ---
I directly use the DLL from FRA4Picoscope, and get gain and phase results directly. A good discussion on the noise improvement for FRA4Picoscope can be found here:
https://www.picotech.com/support/topic14311.html?&start=390


--- Quote from: Hans Polak on April 26, 2019, 09:00:12 am ---2) Since it is possible to "overlay" several measurements in your program, it would help to reduce noise when they could be averaged.
 
--- End quote ---
Yes, this is on my todo list, but a little more work than simple bug fixes, and currently not so much spare time and too many other projects.

Hans Polak:
Wim,
Thank you for the link. As I found out, there are several paramaters that can be used to reduce noise, that was very helpful.

If have another suggestion. In your Reactance plots, you are using positive and negative values, just as they are calculated.
In all Network Vector analyzers and in Spice, the absolute value of these imaginary numbers are displayed, giving the  image almost twice the resolution and a sharp transition at the point of Fres, also quite useful.
See attachment as an example.

Hans
_Wim_:

--- Quote from: Hans Polak on April 28, 2019, 03:09:16 pm ---Wim,
Thank you for the link. As I found out, there are several paramaters that can be used to reduce noise, that was very helpful.

If have another suggestion. In your Reactance plots, you are using positive and negative values, just as they are calculated.
In all Network Vector analyzers and in Spice, the absolute value of these imaginary numbers are displayed, giving the  image almost twice the resolution and a sharp transition at the point of Fres, also quite useful.
See attachment as an example.

Hans

--- End quote ---

Thanks for this suggestion, I was not aware it is commonly done different (have yet to find an affordable VNA). I will implement this in the next version.
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