There is a Bus mode that you can enable instead. This will allow you to assign the FSFC to a Bus (in pairs). So you could assign 2 to the PGM/PST bus. Any source you select on PGM or PST will result in it FSFC that source if needed (everything gets FSync but on SD sources would get FC). If you assign a pair to to a Keyer then you will get the sources in that keyer FSFC as well.
However this will result in the sources not being FSync or FConverted in the MV as inputs -- only viewable in the PV or PGM buses.
#Carbonite