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Stabilize the S22 port with a 6 dB or greater attenuator for starters and 90% of the problems. In addition any VNA has trouble measuring high impedances. For measuring CMRR of my common mode chokes

Nizar, The NanoVNA H4 has difficulty making accurate S21 measurements for several reasons that have been posted many times in this group. I suggest you try measuring a 5K and a 10 K resistor using

Thanks, Nizar. There is almost no difference between the two methods for Z (|Z|), a bit more for R and I. This suggests that the residual shunt capacitance in your test fixture is negligible. The S21

Hi Brian Here S1p and S2P attached 73's Nizar

Hi thanks Sent from Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ Sent: Sunday, May 18, 2025 8:03:31 AM To: [email protected] <[email protected]> Subject:

Nizar, please post the .s2p file. I'd like to see whether the Y21 method offers any improvement over the S21 method for your test. Brian

Hi Roger Thanks for all this papers and sharts, here my simple direct measurements comparaison of this morning for the same balun 1/1 commun mode impedances done by two differents methods : 1) S11

Hi Rod, Confession - I'm not a software guy. It does look like an issue with PIP/python rather than nanovna-saver. Google tells me it is likely the libssl-dev was not installed when python was built.

Hi Paul, when installing nanovna-saver 0.7.3 from github I get the error shown here: a Thank you again for helping me. I love the software. Cheers,? Rod

Hi Paul, Thank you, installing via apt JustWorks! I am using it an it's great! I had been attempting an install from? github. Later this weekend I will send feedback to you with screenshots on how I

Hi Rod, Did you have trouble installing it, or you install it and it doesn't run? I have mint mate (i.e. not cinnamon). I can't recall if it is 22 or 22.1. ?All I did was 'sudo apt install

All: In my recently emailed out method of measuring inductors and capacitors using the Smith Chart presentation on the NANOVNAs, I seriously also considered treating accuracy and determination of SRF.

Below are plots of a 3K SMD resistor and a 1 ohm resistor. Also a 10 pF capacitor which shows good results over a wide reactance range. Note that you need a good test jig and this becomes critical

Comments by Jean-Roger, Nizar and others concerning accuracy of S11 shunt measurements inspired me to write this post. The accuracy of any measurement is important and an excellent paper on this

Hello, Using Mint22.1 All attempts to install NVNAsaver have failed B/C ssl problems, including the instructions at

"Because in case one is measuring a reactive component at a frequency range of interest, which coincidentally is around the self resonant frequency." On the silver mica new unit the leads are about

Hi Nizar, Be careful with this NanoVNA accuracy sheet. It remains indicative, and as you say, accuracy remains dependent from hardware bridge and calibration load. The initial purpose of this picture

Hi Jean Your NanoVNA accuracy Shart is Very Nice : imposed naturaly by the S11 NanoVNA hardware 50 Ohm bridge , indeed S11 accuracy is better around 50 Ohm bridge resistor : S11 accurate prety good 3%

Thank you Dave. It is a quite interesting overview. I just suggest to add an advice about having also an eye of the jX (reactance) value. The idea is to check that this value combined with R (Z

I just implemented a simple method to freeze the automatic scaling. While the numbers are the same, this capacitance comparison is much more compelling. Brian