On Tue, Sep 5, 2023 at 10:24 AM, Mark KQ4EKK wrote:
Is there a way to select those 5 options in NanoVNA-APP?
|S21|
S21 |Z| shunt
S21 |Z| series
S21 R+jX shunt
S21 R+jX series
NanoVNA app does not calculate/plot S21 impedance measurements. BTW S21 impedance measurements are not very accurate using NanoVNA's because they do not do 12 point error calibration and do not have precise 50 ohm source and termination impedances. You also need a good test jig or stray capacitance will greatly affect the measurements. If you search the archives of this group you will find many discussion posts on this topic. Using a -H4 I have found that i can make fairly good measurements from 2 to 3000 ohms impedance using the s11 shunt method.
Roger
Roger Need
