Monte Carlo Analysis with QPSS

Hi there,
I am running a Monte Carlo for QPSS analysis and
would like to measurement some non-linearity
characteristic of a mixer. The problem I am facing
is how to pick up a proper
harmonic that can be used as part of the
expression for Monte Carlo analysis. For example,
the frequency of (-1 1 0) and (-1 2 -1). I know I
can use function of "Harmonic" from special
function of calculator with PSS analysis. How to
set it up with QPSS?

Thanks