Updated: May 6, 2021
The instrument of choice for these impedance measurements is a vector network analyzer and the most common and highest accuracy measurement is the 2-port shunt through technique, using a 2-port VNA. The VNA offers the excellent dynamic range and also wide bandwidth. Unfortunately, the measurement includes a low-frequency ground loop that needs to be isolated.
Watch the webinar: https://coppermountaintech.com/webinar-vna-impedance-measurement-for-power-distribution-networks-webinar-recording/ Read the app note: https://coppermountaintech.com/power-integrity-measurements-with-cmt-vnas-and-picotest-accessories/