Hi Ernst,
When the calibration is complete does the side screen show all the elements of the cal. I assume you are doing an ISOL cal as well as a THRU cal despite perhaps not interested in a S21 measure.
Alan
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Sent: Friday, July 5, 2019 3:57 PM
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[email protected]Subject: Re: [nanovna-users] Strange peaks in S11 with load
[Edited Message Follows]
[Reason: Correction of calibration range]
Flashed firmware nanoVNA_800_ch_20190705.dfu. Unit still initialises from 50k to 900M.
I performed calibration from 50k to 800M, but behavior is strange: there is always an offset of abt -24dB on displayed mag S11 during calibration process..
Now the plots are smooth without spikes but calibration does not work as expected.
Short gives 0dB but open shows -9dB. With "Correction" switched, open and short both have S11 -24dB.
Ernst
