I would like to know if you have software available to load the 12-term VNA calibration coefficients from statistiCAL into the HP8510 VNA.

In NISTcal, I am unable to click the "DEEMBED AND SAVE 2-PORT PARAMETERS" button. The "devices in this directory" indicator does not switch on. I am not sure in what format file the device must be, but is currently named dut.s2p. In the "calibrate 2-port" menu there is another indicator between the thru and reflect indicators called the "Switching Terms File". The text-box is hidden on my PC (windows XP) and I am not sure what to enter there. I think that I understand the rest of the program. It would be nice to have a test example.

Is there a publication available on the optimum number of lines for a multiline trl calibration or the effect of using more lines. On page 1212 of “IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 39, NO. 7, JULY 1991, A Multiline Method of Network Analyzer Calibration, Roger B. Marks, Member, IEEE” it states:

“Although we have no proof, an

optimal design seems to require one line to be a quarter

wavelength long at the band center and the other line to

be three times that length”.

Has further research been done in this field and is there a rule of thumb?

Thank you.