mixer conversion

Hi Guys:

I am measuring the conversion gain/loss of the designed mixer using Cadence Spectre-RF. The voltage conversion gain could be measured either using PSS, hybrid of PSS and PAC analysis or hybrid of PSS and PXF analysis, it was found that the conversion gain value measured agrees in both the PSS and the hybrid PSS and PAC analysis, but differs significantly in the hybrid PSS and PXF analysis. Can anyone suggest the relaible analysis to determine the conversion gain in Spectre-RF?. I also wouls appreciate the logic behind this difference in value is explained. Thanks in advance

Rgds

The PXF is useful to find all the coversion product indexes, while the maximum accuracy is found with PSS.
Mazz