I'm using ADS to simulate an 8-pole; I'm trying to change the values of the 4 reflection coefficients changing the values of the impedances connected at each terminal using the well known equation (Z-Zo)/(Z+Zo)....everything works well a part in one terminal, where I have a P_1Tone to simulate the source connected at the base of a bipolar transistor.... If the impedance of the P_1Tone is 50 ohm, then I should have (Z-Zo)/(Z+Zo)=0 but it is not hte case...does anyone have ever had the same problem? Another question: when I find the Z parameters (in order to find the value of the input impedance of the transistor), dose ADS gives normalised values??

Thanks,

Luca.