[quote author=Mighty Mouse link=1125611607/0#1 date=1125645451]Have you tried the rapid IP2 approach documented in
http://www.designers-guide.org/Analysis/intercept-point.pdf?
It seems like that would probably work for you with default tolerances.
- MM - [/quote]
As I simulate IP2, I get different result when reltol=1e-4(54dBm), 1e-5(77dBm), 1e-6(98dBm), 1e-7(77dBm), 5e-8(87dBm), while vabstol=1e-7 and iabstol=1e-12. I didn't run into this situation with IP3, probably because IM3>>IM2. What do you suggest? Thank you.