Every measurement has some uncertainty. Each measurement should be
written as x plus or minus y, where x is the best estimate, and y is the
uncertainty. Your values are awfully close to 1.00000; all you can say
is the measured value very close to 1.0; I don't see anything here that
suggests a deficiency in the calibration. If you really need higher
accuracy, you can buy a more expensive instrument such as from
Hewlett-Packard / Agilent / Keysight, perhaps for tens of thousands of
dollars! These nanoVNAs are truly amazing! --but they have their
limitations...
Dave
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On 2020-09-04 19:29, aa_talaat via groups.io wrote:
Hi,
The below is part of my S11 file from NanoSaver. I noticed that whenever the second column (magnitude of S11) is 1 or more, the NanoVNA saver does not display the real part of the impedance. Using an online calculator, I found that the real part corresponding to these magnitude values are always negative which does not make sense to me as I was measuring a passive component (inductor).
Is it something wrong with my calibration?
48042000 0.998727266 31.194253000
51041500 0.999179833 29.360382267
54041000 1.000226025 27.701796549
57040500 1.000182064 26.189125799
60040000 1.001095119 24.799515968
63039500 1.001069959 23.558937009
66039000 1.001399956 22.429815311
69038500 1.001659720 21.389665351
72038000 1.001872607 20.457366093
75037500 1.001149762 19.611543210
78037000 1.000688711 18.789749791
81036500 0.999200617 17.978492882
84036000 0.998695054 17.202545874
