roughly speaking, you should run an HB simulation placing,
- Pn_Tone generator with two non saturating input power level tones, spaced from each other between 5/10 MHz (although each manufacturer have their own criteria for this).
- place an IP3in box in th design, then you should be able to publish a table after simulating giving the IIP3 value.
- notice you ll need to define the vout node in the schematic by labeling the output track.