[SI-LIST] Re: 4-Port VNA calibration question
- From: Virendra <adsurevv@xxxxxxxxx>
- To: steve weir <weirsi@xxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Mon, 17 Apr 2006 10:31:00 -0700 (PDT)
Steve,
I don't think i understood you correctly about getting a new pair. Maybe i
should state my problem more numerically. With the setup i have one pair of
probes (port 1 and 2) which are less than 200um in pitch and other pair of
probes (port 3 and 4) which are more than 800um in pitch. As for why the
change, it is a new structure.
thanks again,
Virendra
steve weir <weirsi@xxxxxxxxxx> wrote: Virenda, that sounds like a recipe for
trouble to me. I would go out
and buy a match to the new pair or exchange the new pair for a match
with the old pair. Why did you change geometry?
Steve.
At 10:01 AM 4/17/2006, Virendra wrote:
>Hi All,
>I have a question about calibrating a VNA for 4-port
>measurements. We are using standard pico probes and Agilent 87xxX
>VNA. The problems we are having is that one pair of probes now have
>different pitch than the other pair and it is not possible to use
>the same calibration substrate for both the pairs. Does anyone know
>a way to calibrate this kind of setup with two different calibration
>substrates?
>thanks in advance,
>Virendra
>
>
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