split SAT signals
you can't split the signals/wires that come from the satellite dish/lnb as the box at the end sends polarization signals up the wire to the LNB. So if there were two boxes on the wire they would be fighting each other.
You can buy distributors for satellite signals, we have an 18 bedroom B&B and each guest room has it's own Sky box. We bring the SKY signal in from a quad LNB via a normal size dish to a distributor. This feeds two more, and we have cupboards full of SKY boxes, that then use TV cable and magic eye to link to the television in the guest bedroom. Works well.
These same distributors can also feed FREESAT, as two bedrooms now have FREESAT rather than SKY.
G