Using prerecorded measurement data without TestVNA adding noise and distortion

[Franz G. Aletsee]

Hello %,

I would like to use prerecorded measurement and simulation date to be evaluated with the VNA Tool.

Therefore, I used the TestVNA and added new measurements for a S-parameter file.

Unfortunately the TestVNA adds noise and linear distortion (not checked yet).

With my qucs VNA  simulation (Fig. 1), I can get SOLT working with the noise added by the Testvna.

For Unknown Thru the "switch terms" need to be recorded. I a previous post a dut with high transmission should be used.

I tried this (Fig. 2), but the calibration is not working as expected. We have a reference implementation for Uthru in Matlab and with the same simulation data, it works without any problem. Is there a special format required for recording the switch terms?

Kind regards

Franz

Fig 1.

Fig.2