Edit: The tool is still under active developement, I have just read the wrong copyright message.
@someone:
You made my day! Have of course not dug deeper into it yet, but by its requirements at first glance it may eventually even be able to run on linux! Of course developement has halted, but one never knows wether it does not get picked up again one day. And by upgrading to a slightly higher spec'd picoscope, it also may grow along.
@Mechatrommer
Thanks again for your time and in depth explanations.
I indeed have wondered, wether I should ask in Beginners or here. But since we are talking about my quest for new test equipment, I threw a coin and went here.
But I am not looking for a spectrum analyzer, I already do have this one my picoscope. So S21, if I understand your explanation correctly, is exactly what I am looking for. S11 is way above my head, but I suspect it is, what draws those nice wormholes on the screen.
To jump right to your last sentence, DSO+FG are perfectly fine, I do not need an ultra low noise floor, I am not in the high end business at all, but I do need a FG/DSO combination with a software, that supports creating this report. Or rather a standalone device, that has been my hope.
While there seems not to be such a hardware device,
someone has found the software! And you as well. Needs a test and a deeper peek at the thread over at picoscope, as it seem out of developement, but at least a very promising start.
And in case I still have a XP VM with a passed though USB Card, that'll do the trick as a fallback, if the software should become incompatible with a new SDK.
if you want cheap/audio spectrum analyzer, some forum members swore by PC softwares that utilize your sound card with better dynamic range than a scope
And somebody even has made a frontend for this method:
http://www.pmillett.com/ATEST.htmAnd as mentioned before, I do own a pretty decent soundcard, somehow I just feel uncomfortable in using it as a mesuring device. Gotta really hate psychology. And software like mataa for Gnu Octave or Matlab seem to be quite powerfull, but come in at a rather steep learning curve.
However, there are some interesting discussions about this soundcard solution vs. the QA401, but generally, they are all way above my humble requirements. May change in future.
So for now I'll give the Fra4Picoscope software a go and see from there, where I will eventually be heading.
Thanks again all for your input! Big help