On Wed, Dec 4, 2019 at 03:09 PM, Kurt Poulsen wrote:
Kurt and Rune,
I found the same thing as Kurt. I had to multiply the delay by 10. I have connector savers on my NanoVNA. They add a delay of 52 ps. as reported by Dave Kirby in an earlier post. I had to enter -520 to get the short and open to go to the two extremes on on the Smith Chart horizontal axis.
Roger
Hi Rune
The dealy to enter is by a factor of ten. E.g. if the measurement plane has to
be shifted backward to the calibration plane by 50.7ps the I must enter -507ps
and this the sign is Ok.
I used the calibration with two testcables and calibrated with the female kit
setting and left the thru adaptor positioned (I had created a calibration kit
file and used it)
Kind regards
Kurt
Roger Need