Hi
Thanks Roger and all contributers for their interesting comments ,
i am agree of almost all , it is true that making measurements of the low resistances of the inductances with the 50 Ohm divider bridge is very tedious, it is certainly not the best arrangement for this kind of measurement even with S21 methode, but remains a question which may have to do with the details of the calculation model by the firmware : why is there so much change in result just by changing the stimulus Span as long as we have done the calibration with the same 50 Ohm load and same NanoVNA , there is only the stimulus span which has changed in the meantime, this phenomenon has not been observed with NanoDeeplec -F.
Brian , I dont think that it's an interpolation error, indeed both calibration's are done alone with each span with 401 sweep point's for each , so there is no need to do interpolation .
Excuse me , the inductance is a 8 turn within T30-6 ( not T37-6) .
73's Nizar.
