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[scopehal-apps] azonenberg cd7ce11 - Added factory wrapper to FileBrowser to create the correct type of browser depending on the selected preferences. Also takes fullscreen state into account which previous version did not. See #538.
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<azonenberg>
Nice
<azonenberg>
Did you get machine readable .s2p files too or just printouts?
<azonenberg>
the latter is key for de-embedding and is often not provided with cheaper cables even if they're VNA *tested*
<azonenberg>
With serialized cables from good vendors, half the delta in cost is the extra administrative overhead to manage the s2p files and store them somewhere you can access etc
<d1b2>
<Code and Solder> Nope, though I didn't even ask for the printouts, messaged them to ask if they happen to have them anyway
<d1b2>
<Code and Solder> I get the same "noise" in NanoVNA measurements regardless of what I'm measuring, bad calibration?
<d1b2>
<azonenberg> If you see a constant ripple in every DUT then yes, bad cal would be a definite suspicion. also check your cables are firmly attached to the VNA
<azonenberg>
But thats one of the problems with these cheap VNAs
<azonenberg>
they just take "ideal" standards for short/open/load/thru right?
<azonenberg>
the standards don't come with measured curves?
<azonenberg>
High end VNAs usually use really well matched standards, but a lot of cheap ones use low grade standards
<azonenberg>
My PicoVNA makes up the difference in software
<azonenberg>
they have full s-parameters of each cal standard measured on a fancier VNA and use that data in the calibration
<d1b2>
<Code and Solder> The option to input them is there but no, they were not supplied for some reason
<azonenberg>
Having L /C parasitics is a start but its not the same as full VNA measurements
<azonenberg>
because real standards have reflections and resonances and such
<azonenberg>
they may not be large, but they exist
<d1b2>
<Code and Solder> my first order approximation of that reason would be a price for the whole thing significantly below a reasonable quality calibration kit
<azonenberg>
Yeah exactly
<azonenberg>
thats my point, pico is sitting in a nice midrange where the standard is cheap but you still pay to have it well characterized
<azonenberg>
and have software that can correct for most of the non-idealities in DSP
<azonenberg>
the nanovna probably doesnt
<d1b2>
<Code and Solder> I have no idea what nanovna-saver does inside it
<_whitenotifier>
[scopehal] azonenberg opened issue #735: Refactoring: make filter, oscilloscope, etc serialization use yaml-cpp vs outputting to a std::string with raw concatenation - https://github.com/glscopeclient/scopehal/issues/735
<_whitenotifier>
[scopehal] azonenberg labeled issue #735: Refactoring: make filter, oscilloscope, etc serialization use yaml-cpp vs outputting to a std::string with raw concatenation - https://github.com/glscopeclient/scopehal/issues/735
<_whitenotifier>
[scopehal] azonenberg assigned issue #735: Refactoring: make filter, oscilloscope, etc serialization use yaml-cpp vs outputting to a std::string with raw concatenation - https://github.com/glscopeclient/scopehal/issues/735
<_whitenotifier>
[scopehal] azonenberg labeled issue #735: Refactoring: make filter, oscilloscope, etc serialization use yaml-cpp vs outputting to a std::string with raw concatenation - https://github.com/glscopeclient/scopehal/issues/735
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[scopehal-apps] azonenberg a056418 - Added load vs save support for FileBrowser. Added menus for file load/save that don't actually do anything yet. See #512.