开云体育

On Mon, 17 Aug 2020 at 22:50, Jerry Gaffke via groups.io <jgaffke=
[email protected]> wrote:

David,

Good stuff, thanks for posting.

Assuming the connectors physically stout enough to give repeatable results,

That particular short is very repeatable, as the female centre conductor
has no slots in it, so it doesn’t expand in diameter when the male pin
enters.

would it be possible to calibrate out most of the errors encountered in a
cheap or homebrew calibration set?

Is this something that could be done through post-processing in
nanovna-saver?

If a low-cost kit is designed properly, (and I am yet to see one that is),
then yes, errors can be largely corrected in software, but it doesn’t solve
the current problems with the NanoVNA if you want to use it standalone,
without a PC.

You will not get the accuracy of a Keysight kit, as the female centre pin
will always expand in diameter on SMA. It would be very expensive to make
an SMA connector that avoids that problem

FYI, the two images in your "not-see-a-dot" FAQ don't show up

Yes, I noticed that after I posted it. I will resolve that today. It is
weird what caused that problem,

Jerry, KE7ER

G8WRB
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

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