Hi Kurt,
Sorry for taking long to reply to your email.
The issue in your earlier tests seem to be with C0=0: the calibration
corrections divide by a value that is dependant on C0, and for that reason,
C0=0 is not a valid standard - and the custom settings for the "open" is
disabled, including delay.
--
Rune / 5Q5R
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On Tue, 19 Nov 2019, 16:02 Kurt Poulsen, <kurt@...> wrote:
Hi All
In the NanoVNA-saver the calibration settings, when doing a female
calibration with the supplied NanoVNA calibration kit, where the male SOL
parts are fitted to the FF adaptor, need some special settings until Rune
gets fixing the following:
The Open delay does not work and substituted by a C0 setting as shown in
attached image of 1022.3 fF Do not use the open calibration standard just
leave the FF adaptor open
As Shunt C for the load not yet implemented an inductance og 205pH
introduced as temporary fix
The data are for the NanoVNA-H delivered after end October. The earlier
delivered kits are for Short and Load identical but the delay of FF adaptor
is a bit longer and 70.3ps
Remember the NanVNA internal C0 calibration must be done prior to using the
NanoVNA-saver with the same setup as when calibration with the
NanoVNA-saver
Kind regards
Kurt
