Hello
Here is the test I did
Measurements on a loop antenna at a distance of 50 m (zero reagent around 7.100 MHz) between 1 and 20 MHz (1010 steps or 10 segments) made with a nanaoVNA-F and nanovna-saver. In order to access what is closest, it seems to me, to raw measurements, I did not put "filtering", I put 1/0.
I launched the measurement 5 times and I saved in .s1p each packet of 1010 measurements. It is therefore a total of 5050 elementary measurements.
You will find in Attachment a summary of the 5 groups of identifiable errors. Values ??are rounded for ease of reading. It doesn't matter what method to find these errors; there are at least those there but there may be others not identified.
Sheet: "Synth¨¨se"
Column a: reference number
Column b: frequency
Column c ¨C g: measurement of real S11
Column i ¨C m: measure of imaginary S11
The columns are to be paired; example: c2 and i2 are the a+jb of the same measure. Values ??assumed to be in error are highlighted in yellow
To analyse
No 1, 2, 5: a single false measurement (simple case)
No 3: two wrong measurements
No 4: the most curious? Why this ?
Try to imagine a method to identify these errors and, above all, to correct them. A solution may be to delete these error lines. We see the risk of involving an average value because it is not measurement noise.
In the sheet: "Ligne 4" one can examine the exact values. It is very disturbing that the two pairs of value measure n¡ã1 and measure n¡ã2 are strictly identical; for me, it hides something.
To your meditation
73
--
Fran?ois
