Hi
a Calibrated smith diagram can show you easily the serial resonance frequency and the parallele one ( Xr = 0 Omh ) ,
- use the 401 sweep points option to have maximum frequency accuracy .
- Stimulus band should be selected to be the minimum needed .
- Calibration and measurement prefered after at least 10 minutes for thermal stability .
you can use open coax terminaison or short one , they should give approximatly the same results .
73's Nizar.