What do you mean by "ADE" ?I have done AC analysis by selecting the ac option in ADE,
Simply apply 20*log10().using a dc source and giving it 1V ac magnitude.
For the output i selected the desired output voltage net.
I am getting values in mV , which i think should come in db.
Simply, you are wrong in setting simulation or post processing.Try to simulate the xf analysis but nothing is shown,i.e,
no graph or output.
It seems your required task can be resolved.Did AC analysis with a dc source with AC magnitude set at 1V.
get a waveform, then go to results - other plot - db20.
click on the output voltages nets and press escape.
a db plot is shown.
got two values of -31db and -29db at operating frequency of 10MHz.