I want to measure the output voltage of a three-ports network, which has a small input impedance ( 0.04+4.8i). I connected the input port to the signal generator, and output ports to the spectrum analyzer, as the function generator output depends on the load, my question is that which mode should I use?
Mode1: 50 ohms, As I know my load is not 50 ohms I do not think I can use it.
Mode 2: High Z, I know that the impedance of the device under test is not high.