I agree....... my NANOvna and my Antuino sit there unused because my old brain and the fact that my medical education didn¡¯t cover electrical or RF engineering I am hopelessly lost in using these neat and ¡°simple¡± devices and life doesn¡¯t have enough days left to live in books learning from scratch all the stuff that has been in this group since the vna came out. I should be happy as my YOuKits FG-01 does just what I need to set up an antenna but these new toys piqued my interest. I want to be part of the ¡°in¡± group but find it is getting more difficult.
Dave K8WPE since 1960
David J. Wilcox K8WPE¡¯s iPad
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On Oct 18, 2019, at 1:09 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
?An excellent idea.
Someone new to VNA's and what a complex impedance is will be overwhelmed
if told to check the wiki, all the forum posts, and read some Agilent document.
They just want to measure their antenna's SWR (they think).
Or maybe sweep a filter.
A first document should tell them that without having to first wade through a lot of new material.
We need a single document that tells how to charge it, turn it on, configure it to show SWR
and complex impedance, and then sweep across a range of frequencies.
How to measure that filter.
How to deal with the user interface, what parts of the menu structure they can ignore,
If ambitious, further sections of this document could give a primer on what a complex impedance is.
When calibration might be a good idea.
What a reference plane is.
Maybe set up a few example exercises, using a 100 pF cap and a 100 ohm resistor so the parts are likely on hand.
Keep the frequency fairly low so it's easy to reproduce.
Show them how to measure these parts in various configurations, and what results to expect.
Perhaps add a hand wound inductor to the mix.
And what happens when this stuff is put on the end of 25 feet of cheap RG79 coax.
An appendix with links into other documents with a brief description of what can be found there.
Things like transmission line theory, impedance matching, Smith charts, S parameters.
Jerry, KE7ER
David Wilcox K8WPE