TRF37T05: TRF37T05 Equations

I have a customer who is asking the following questions about the TRF37T05

Which equation does the TRF37T05 implement?

RFout(t)= I(t)Cos(wt) - Q(t)Sin(wt)           --OR--  

RFout(t)= I(t)Cos(wt) + Q(t)Sin(wt) ?????

where

I(t)=BBIP(t) - BBIM(t); Q(t)=BBQP(t) - BBQM(t)  Data Sheet Terminology 

The LO phase relationship between I mixer and Q mixer determines which of the above equations hold.  In the case of a weaver modulator, the single tone would switch between Flo-Fm and Flo + Fm depending on the sign between the I and Q mixers.

In another design we are using your DAC38rf83 and in that data sheet the modulation equation is clearly stated. The sign between the real and imaginary parts is NEGATIVE.  

What is the equation for TRF37T05?

Thanks for your help with this!

Richard Elmquist