Hi, we purchased a PicoVNA 106. Previously we have been using miniVNA / picoVNA so have some experience using this kit.
I have set up a simple test for S11. I have calibrated using the Pico SOLT.
I have then connected the 50R termination back to the cable which is showing as a 50R impedance on the smith chart plot. But the S11 Real impedance plot is showing 0 (also the Imaginary impedance plot but you would expect that to be for a near-purely real impedance).
Why would the S11 Real plot not be showing 50R too (at least at some point along the sweep)?
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