Here is a second report on the effect of calibrating the NanoVNA on SWR and Return Loss measurements. This time a 20M dipole was used as the antenna. It was surprising to me to see how good the measurements were when using the default 50 kHz. to 900 MHz. calibration and setting the Stimulus range to 13 to 15 MHz. Interpolation works well under certain conditions.
Roger
Roger Need