Reading A and R channels of the HP8753ES

[Musteralias]

Dear community,

I have again a question regarding the HP8753ES VNA. This time I would like to query the raw data from the A and R channels. In my experiment I cannot measure S11 directly, so I have to disable the output on port 1, measure R at "R channel in" and the incomming signal A at port 1. Then divide them so that S11=A/R.

My problem is how to disable port 1 as source so that only "R channel out" is a source and how to get the A and R arrays.

I tried the latter with "MEASA;OUTPFORM;" however this returns only real numbers. I tried "MEASA;REAL;OUTPFORM;IMAG;OUTPFORM;" but I don't know if this is correct, because I only got one array instead of two and all values were alternating around +/- 10^-2, so it looks just like noise, but the screen shows a clear maximum and minimum.

I have also uploaded the programmer's guide and code examples by the manufacturer.

[santo_13]

Were you able to confirm that the Instrument indeed supports that method and you need help with finding the right set of commands?

[Musteralias]

I was not really able to confirm this, also because this is my first time using a VNA this way. But I can confirm that, in my opinion, comparable devices like the ZVR by Rohde & Schwarz can do this.

I have also uploaded a sketch of my setup.

Maybe I am also just stupid and getting the signal at R_in is not necesary, since it should be the same at R_in and Port 1.