Do you think you get a right result when you analysis by .fft on Hspice?

[rkwang]

hi, all
Now I wanna analysis IP3 of my filter unfortunately, I understand not much
about .fft command in
H-Spice. I was read manual's H-Spice but I can't understand.It's too shot
and not clear anymore!.
Have anyone get .fft? please tell me.
thank you,
kwang