The sencond sinusoid at the port properties good to check the IP3, which is necessary RX parameter for design. Furthermore if you want to run pnoise from pss to calculate NF at the presence of a blocker you will need the blocker next to your desired signal at the same time.
80MHz blocker what means in your terminology? Is it an actual 80MHz carrier frequency or a carrier which is 80MHz far from your receiver's center frequency?
Are you using mixer in the RX chain, and if so what is the intermediate frequency? Do you have direct, homodyne or heterodyne receiver?
I have never used pac analysis, the normal AC was enough for me to the endpoint of my LNA. If you don't have mixer transient has to be fast, and usually gives the right results.