Cyclone,
The capabilities of much of the kit used by FACs can be googled, but is perhaps best passed over here.
But you want to be able to pass information, quickly, reliably and safely in BOTH directions, not just from FAC to aircraft.
With this in mind, it would be interesting to know what difference PRISM IDM (which allows the transmission of imagery to and from the aircraft) would make for a FAC.
I guess we need someone with experience of Gold Strike F-16s to tell us that.