Patent ID: 8264238

Claim:
A calibration method for performing open circuit and closed circuit calibrations of a voltage/current (VI) probe, the method comprising: inserting a VI probe into a circuit including a first known load, Load 1 and applying a first signal to the circuit; measuring a first raw impedance (Z RAW1 ) using the Load 1 ; inserting the VI probe into a circuit including a second known load, Load 2 and applying a second signal to the circuit; measuring a second raw impedance (Z RAW2 ) using the Load 2 ; defining a fixed reference impedance, Z R50 ; using the first and second raw impedances, and the fixed reference impedance, in determining an open circuit impedance, Z OC and a short circuit impedance, Z SC ; and using Z OC and Z SC to determine a plurality of calibration coefficients for the VI probe.