Additional Features: Directly displays the impedance measurement parameters Uses I-V method to measure impedance Provides OPEN/SHORT/LOAD fixture compensation and the port extension that eliminates additional errors by the fixture External DC bias Equivalent Circuit Analysis The Agilent 43961A RF Impedance Test Kit provides the capability to measure impedance parameters of 1-port devices with the Agilent 4395A Option 010 (100 kHz to 500 MHz ) or the 4396B Option 010 ( 100 kHz to 1. 8 GHz ). The test port on the Agilent 43961A is a 7-mm connector and can be used with the 16191A,16192A, or 16193A test fixures.