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probably it just means that you calibrated your VNA with bad terminator. So, now it shows good terminators as bad, because they are not bad as one which is used for calibration :)

I had some time and tested some terminators for fun. I thought that commercial terminators are nearly perfect, but not mine. I have a N terminator perhaps from Digikey, and It was worse than my very

Thank you all for helpfull posts and links.

Nope, I always reformat data before gnuplot so that it reads in traditional columns. Attached should be the gnuplot Smith Chart command files

Thanks for all the feedback. First to clarify, the correction process is 2 -step for the BNC-alligator clip lash up. One is the removal of the shunt C of the OPEN clips and Two is the total series

Thanks!

WB2UAQ, Between the HP8721 directional coupler and HP 85032 calibration standard you've got some pretty expensive toys there. The NanoVNA must feel outclassed when used with them :) Herb

Hi Alan Yes the type J pots are good. Years ago I built a K2BT noise bridge and also a Wilford Caron bridge. The pot called out for one side of the bridge was a 250 ohm type J linear pot. I still have

$ python3.7 -m pip install --upgrade --force-reinstall numpy That solved the problem. NanoVNASaver now runs on my Mint workstation.

https://www.st.com/en/development-tools/stsw-stm32080.html /g/nanovna-users/search?q=windows+7+usb From Nigel ZS6RN: "I have updated with the newer version based on the file name

Oristo, I forgot to mention that I use the NanoVna to measure return loss with good dynamic range. First I tested the S21 performance of the NanoVna with an HP 355D and found that I could measure the

Yes, slow devices >>on the same hub<< can impact thruput of faster devices. USB is, after all, "Universal Serial Bus". so faster devices must toe-tap while slow ones (e.g. HID keyboards and mice)

Thanks for the explanation! I haven't tried this yet but will do what the manuals for the old Gen Rad bridges suggest. They suggest "shunting down" the unknown and out of range impedance with a

Hi, I'm looking for drivers for windows 7 nanovna usb port. thanks Gaetano

Hi Herb - I understood that. Exactly, but (lacking another impedance bridge) I would like to know how far off is nanoVNA measurement using >>MY<< "Mickey Mouse calibration"

They are mixed down for the analog-to-digital converter (ADC), which arguably makes DSP harder, since it has to sort opposite side band suppression. Here is a collection of articles that I find

Oristo, My reading of Alan's post is that he performed a normal OSL calibration at port 0. After that he connected his shorted clips to port 0 and noted the difference between the OSL short and the

Hi Alan - I would be very interested to know what value is reported by nanoVNA for that inductor @ 3 MHz after "Mickey Mouse calibration" by short, open and ~ 50 Ohm resister in alligator clips.

Herb, the "cutoff frequency" is the -3 dB point. I should make that more clear, I suppose :-) -- Rune / 5Q5R

Rune, The international definition of bandwidth is actually the -3 dB points. That is what most manufacturers mean in their literature unless specified otherwise. The -6 dB and -60 dB points are more