Kurt and Roger,
thank you for the correction! I'm sure I've messed up the conversion from
picoseconds to seconds :-)
I agree that shifting to the end of a cable using the delay is not very
accurate - but in some cases, it's all you can do. At least the option is
there! ;-)
--
Rune / 5Q5R
On Thu, 5 Dec 2019 at 06:27, Roger Need via Groups.Io <sailtamarack=
[email protected]> wrote:
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
