daveh75:also an aerial and satellite installer, and as stu31 says, wherever possible, idealy the cable should run from aerial/satellite direct to stb, i.e without a wall socket, any time you join the cable your going to introduce losses and increase the potentail of faults, as for the wall plates, they come both screened and unscreened
so if i have two tvs to supply a signal to, does that mean i should have two cables coming from the aerial one going to each of the relevant rooms? is that a normal arrangement, does it need anything special at the aerial end?