This is a bit left field, but bear with me as it could be a simple method to get a better characterised cal kit ...
I have an SDR kits cal kit which is only supplied with electrical delay values. It has no fringing capacitance coefficents.
The open standard in the kit is just a dust cap. It has no effect on the measurement, at least not significant enough to matter.
Therefore the open standard is just the open female SMA adapter which I have on the port of my test set.
Taking a punt here and assuming that the female SMA adapter (which came with the Rosenberger SDR kit) I have is very similar to someone elses.
Therefore, could someone with a nice cal kit (G0HZU?) do me a big favour and sweep an open female SMA, and post the S1P file?Then I'll take the file, try and run it through the script and see what C0,C1,C2,C3 values come out. Then put them into the VNA and try it out.
The short and load are already covered - there are no L0,L1,L2,L3 fields in the old VNA's for shorts, so I can't input those anyway.
Since I already have the delay for the short, so that is the best I can do for now.
I already have the SDR Kits load, as well as several non-precision 18GHz Inmet loads from eBay, out of which I have selected a few which measure quite close to 50 ohms at DC. The best I can do here is hope that they are still close enough to 50 ohms up to 6 GHz. At least they all compare sensibly with each other and with the SDR Kits load.
Anyone still with me?