What are the 50 ohm scattering parameters for a piece of 75 ohm coax? (I just need two of them of course). For simplicity assume that the length of 75 ohm coax is 2 electrical wavelengths at the frequency of interest and that the line is lossless.
I am trying find discrepancies in measurements from a VNA for a two port DUT. I suspect that 75 ohm coax was used to connect to a DUT on at least 1 port with equipment set to a 50 ohm system.