With a "normal" nanoVNA (50 ohms), if, during the SOL calibration, instead of using 50 ohms during the LOAD you place a load of 75 ohms, it works. The central point of the Smith will correspond to 75 ohms. On the other hand, it will be necessary to make a rule of 3 for the values ??calculated by the NanoVNA. It is only the measured ROS that is correct and the Smith only displays this ROS.
--
F1AMM
Fran?ois
