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Somehow my photo of NanoVNA with STM32F303CCT6 and the USB mod uploaded to "files/Hardward Mods" didn't show up there. So I attached my photo below. The PCB was provided by Hugen, since I don't have

Hello Kurt, that is a wonderful description of what you three did a while go when measuring the performance of ferrite materials. Very cool stuff and because I'm just looking in exactly that topic I

The coordinate system of the Smith Chart is a plot of complex numbers representing the reflection coefficient. The reflection coefficient is basically a ratio, and thus has no units. You can read

Hi Dave. I was replying as an aside to Dick’s post-script aside regarding Smith Charts in the thread, here: /g/nanovna-users/message/5216 Best, - Jeff

My >>guess<< is limited code space and performance: * Typical use wants correction for each reading - don't want custom loop for calibration - don't want special test for calibration to slow that

Hi vk2krn - "RESET" on touch screen only clears current calibration data, does not affect SAVE 0-4 - unless by some firmware bug[s] ~ configuration data (including calibrations) is liable to

I personally do not understand the need for "reset". If you go through each cal step and save, why can't it simply over-write what was in the memory in the first place? If you save the data with

NooElec is more like 1 person not 50! been around for a while. Had a very bad warranty experience with them. I do not see any advantage in ordering from them. Authorized give me a break! Tim -- Tim

Hi Starsekr and All, Another test jig for measuring Ferrite is shown here: https://www.kn5l.net/S21adapter/ There is also a section describing process for plotting Complex Permeability using SimSmith.

OK, gnuplot Smith chart is slightly smaller by gif than png on my Windows PC, but gif takes a disturbingly long time to generate, so updated: http://ormpoa.altervista.org/gnuplot/ .. with a small

#60 : @ Gary O'Neil - 17 October 2019: /g/nanovna-users/message/5075 Dear Gary, Allow us, please, to reply your most valuable comments and suggestions as follows: C1-GN : 1st

@Oristo - Is my understanding correct that if I select "Reset" and then proceed with a calibration, ALL previously stored Cal data is cleared? Now if I make a fresh calibration for a different

Here is an example for gnuplot line colors: http://www.gnuplotting.org/multiple-lines-with-different-colors/

Hi Rudi First of all the use of the testcables from the NanoVNA female SMA adaptor (the SMA male female adaptor saver) to the reference plane is a bad idea. The female female adaptor used during

Hi Rune - Oops, thanks for testing. Before Smith charts, my gnuplots were smaller by gif than png, and I did not think to recheck.

That's interesting. I just tried it with a different plot I have a script making hourly plots, 1024x768 pixels. .gif is 18547 bytes, .png is 14244 bytes. So I definitely see .png being smaller. (Also,

Do new calibrations not work immediately after creating? Run RESET before any calibration or to run uncalibrated. nanoVNA always loads C0 (if saved) at power-on; use RECALL to load any other saved

VcXsrv works for me with WSL since 2017 https://codeyarns.com/2019/05/11/vcxsrv-x-server-for-windows/ gif will be smaller than png Thanks, I forgot to update color coding. gnuplot works fine directly

Hi Rune, thanks for your kind offer, S21&S11 on the same plot is for sure good enough!? Kind regards Norbert, DG1KPN

Smith charts show resonances, where plots crosses horizontal axis. Sad, because Smith chart simply plots S11 reactance vs resistance.