In general, we only use NISTCal for 4-port calibrations. If you are
performing 2-port calibrations, you would better off using MultiCal or
StatistiCAL. Here are some partial answers to your questions.

At 11:09 AM 2/1/2005 +0200, you wrote:

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

Sorry, but I do not have such software.


>
>
>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.

The device directory must be filled with device measurements taken by
NISTCal before this button will light up. That is a possible problem.

>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.

You need switch terms for a first-tier calibration, but not for a
second-tier calibration. So perhaps that is the problem. Usually we
automatically save the switch terms in a file "GXXX" where XXX is the name
of the thru measurement, but we only do that for first-tier calibrations.


>
>
>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?

No, little research has been done. But the program FINDLEN will allow you
to design these calibration sets.


>
>
>Thank you.
>
>
>
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-----------------------------------------------------
Dylan Williams <dylan@...>
NIST 818.01 <dylan@...>
325 Broadway [+1] (303)497-3138 (TEL)
Boulder CO 80305 USA [+1] (303)497-3970 (FAX)
http://www.boulder.nist.gov/div813/dylan/
-----------------------------------------------------

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