I have a F-90 Bt and I want the HD radio and Sirus radio...what interfaces do i need to buy and how do you connect both at the same time? Please Help Thanks ????

I think you will need to use the auxillary functions of either the HD receiver or the satellite receiver and run one through the other. Based on my experience, you would be better off running the satellite receiver through the HD receiver for a stronger signal.

http://hdradionow.com