i want to connect another sky box,?

you should be able to run a cable straight from the dish, (if its a sky dish it should have another connection point) it might be easier to split into the cable but you could get reception problems, I ran a cable from my dish to my kids room, it didn't take long and had no problems at all

It won't artwork. An aerial amplifier in undemanding words works with a television aerial, no longer a Sky field. in case you % Sky in greater effective valuable than one you, you decide on a field in each room and sufficient outputs on your dish for each field. (Sky multi-room). indoors the bogus you could run a cable out of your Sky field to a different room, or use a on the spot sender, yet you will in undemanding words have the means to seen demonstrate unit an same chanel in each room.

You can split but best to go through a Booster(this accounts for halving the signal)