We purchased this analyzer to replace a HP 4195A. Need to know what I need for the 4395A to be able to measure Impedance. The manual talks about option 010, but nothing states what that option is. When I go to the menu for Analyzer type "Impedance Analyzer" is not one of my options. I am looking to purchase the 43961A Impedance kit but I need to be sure because of the cost of the probe that I will be able to measure impedance and that with the 43961A hooked up that under the menu for Analyzer Type that "Impedance Analyzer" will show up.