Calibration with SO-239 connector & NanoVNA-H

•   With this solution I can directly connect antennas with PL-259 and have exact calibration at the  output of the SO connector.

When you calibrate the NanoVNA with the supplied cable and you put the loads (open-closed-50 ohm) you have calibrated the instrument. Then you have to put a reducer to connect the antenna cable, in my case I have RG213 drops with UHF PL-259 female connector. Before connecting the antenna cable, the NanoVNA changes the calibration as soon as the reducer is inserted. In this way I have calibrated antenna analyzer with all the reducer and thus I get exact measurement of the cable and antenna.