3-Port Impedance (V/I Method)

Measure output impedance on higher-voltage rails (12 V and up) using the 3-port V/I method — injecting a current while measuring the voltage response — where a 2-port shunt would risk your instrument.

Works with any VNA or Oscilloscope. Buy the parts you need below, or request a quote for the full setup.

What you need to make this measurement
VNAAny VNA/Oscilloscope — measures the voltage/current response
CoreJ2111B Current Injector — injects current while you measure voltage to derive impedance
CoreP2102A 2-Port Probe — measures the voltage response
CorePort Saver DC Block — protects the instrument from higher voltages and spikes
OptionalCWT Ultra-Mini AC Current Probe — one option for measuring the injected current

Not sure what you need? Build your setup & get a quote →