ADS2009 plot error?

Hi.

I'm trying to plot the conjugate matching coeficient TMS=TIN* for a given Tout, selected from a Gp plot in the TL plane. So I inserted an equation for TMS(Tout). The problem is that when I add this point to a smith chart plot, the point is always out of the plot althought axis are automatic. It has no sense since the coefficient mod is less than unity. If I insert another equation defining the same result numericaly I get good results, but I have to change that definition every time I change the Tout point.

Any clue?

Thanks!

you may link with frequency.
Can you share the design?
I am unable to understand.

I know that if you want to plot an impedance in ADS , you have to do with gamma, convert it in gamma, after that the point ll be inside the smith chart.

I don't know if this could help you but...