On Wed, Jan 22, 2025 at 01:31 PM, W0LEV wrote:
In doing so, you have reassigned the center of the Smith Chart to 77.7
ohms. Therefore, even if your are measuring a matched 50-ohm resistor, it
will read 77.7-ohms. Set it to 200 ohms, and a 50-ohm resistor will read
200 ohms. Set it to 50-ohms and it will read 50-ohms.
This is incorrect. Changing the system impedance will NOT change the measured impedance value. It only changes metrics based on Zo like Smith Chart plot, Return Loss & SWR.
Roger Need