Panasonic FP2 - Manual (Page 26)

FP2−CCU Confirming Unit Settings and Design Contents
3 − 4
Note
The No. 1 and No. 5 transmission format setting switches are
reserved for system use. These are set to “on” when the unit is
shipped from the factory, and should be left at that setting.
The transmission format setting switches are located on the back of the unit.