Hi.
What definition of gain do you use each for PSS/PAC and Transient Analysis ?
These are surely same ? ???
The definition of Voltage gain of PAC direct plot form is "Vout/(E/2)",
here E means open voltage of signal source.
It is not "Vout/Vin", here Vin means voltage at an input node of DUT.
Do you use gain definition of "Vout/Vin" for Transient Analysis ?
If S11 is far from matched, "Vout/(E/2)" and "Vout/Vin" are quite different.