getting NF vs LO power using PSS and Pnoise analyses

Hi! Im having some trouble getting NF vs LO power using PSS and Pnoise analyses. I just get
NF with some points at frequency defined at Pnoise form (Output frequency sweep range = 10 MHZ).
I follow the LAB2_Mixer_Tutorial (page 15 and 16) that is available downhere (atach)... and i really need this graph to optmize my
mixer NF. Any Suggestions?