Excuse me for my ignorance since I am new with satellite. Anyway we moved to this new house with a satellite dish on the wall but without a regular aerial, and my son is crying to watch doctor who on BBC. My options is either to get receiver, like this (http://www.simplydigital.co.uk/acatalog/Sky_Digital_Receivers.html), to watch freesat, hoping that old dish still works or to subscript Sky. I am wondering how I can check if that old dish still works before I ordering the box. If I have sky to install a new satellite system to my house, shall I have them dismount the old one, or shall I leave it on the wall so that I can have a second system later? I would not mind drilling another hole on my wall.