Yes you can. Make sure that you get "unstacked" channel maps when it is activated. You must have your BUD aimed at F1 when you call.
If you are using a 4DTV 920 or 922 as a dish mover, make sure that the Ku sides of F1 and F2 are not programmed into it. Else you will overload the TDT (transponder database table) of the 4DTV receiver and need to do a master reset.