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Hi Roger Here my plots of S11 and S21 measurement of the 4.63Kohm leaded resistor at same time , same graphe , same scale they are dramatically differents , and I prefer the S21 obviosly . May be i am

An ideal test fixture would maintain a 50Ω impedance right to the device body. The Keysight high-frequency SMD fixtures come close to this ideal, the device interface center conductor is a disk,

Those leads account for about +j5 at 28 MHz. I'm giving the leads about 28 nH of inductance. The +j5 ohms is about 10 % of your measurement system impedance of 50 ± j 0 ohms. Dave - W?LEV

Nizar, The NanoVNA-H4 is only a one-way VNA so it does not calibrate for s22 and S12 and only does six point calibration. In order to get good S21 series measurements you need the source and load

Hello Dave, I agree with Luc. Everything I've read about Smith Charts says that ABOVE the horizontal (resistance) centerline is Inductive, and everything BELOW is capacitive. But I still have a lot to

I have used mine to measure the inductance of antenna load coils that I have made. I fabricated a test lead that is a coax that terminates in a pair of alligator clips. I clip the leads onto a panel

Hi Dave It's a leaded resistor with 2cm legs 73's Nizar

Were you using a leaded or SM resistor in these tests? A picture of the setup might be of value. Dave - W?LEV [email protected]> wrote: -- Dave - W?LEV

Hi Roger You are right, i tested a 4.63 K Ohm serial resitor S21 gives me 5.35 Khom +15.6% error but regular static value across the 30Mhz span , S11 shunt gives me a very irregular values across the

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