W5DXP, thanks again, good information.
With regard to your previous post, and calibration at the "measurement plane." II understand correctly, this means conducting the SOLT calibration procedure with a 50 ohm resistive load at the point of interest in the network. In the instance of wishing to measure the impedance at the end of the ladder line on the far side of the 1:1 balun, I would connect the VNA to the balun, and conduct the SOLT calibration at the balun output - in my case, a pair of terminal posts. So, with the VNA connected to the input side of the balun, I would first short the output terminal posts, then leave them open, then install a 50 ohm resistive load between them, and...I wouldn't do the "through" calibration, in this case. After the calibration steps, I would connect my ladder line to the balun's output terminal posts, and would then be looking at the impedance of the feed-line/dipole network at the point where it connects to the balun. Correct? And, if so, what would be the most appropriate way to connect the 50 ohm load across the output terminal posts for the "L" portion of the calibration?
