1. The two port network is as given above. The aim is to determine the z-parameters for the given circuit. 2. To find z11 and z21, open-circuit the output terminals and you will have to measure the voltage across it. And connect a current source to the input terminals as shown 3. To find z12 and z22, open-circuit the input terminals (you will have to measure the voltage across it) and connect a voltage source to the output terminals.