I have just finished decorating my lounge and have chased an hdmi cable and two coax cables into the wall ready for a Panasonic tv (not yet purchased). Not being overly technical, I have used standard coax cable (I had a reel of it). I now discover that I should have used a higher grade screened coax cable. It is no longer possible to retro fit these. Will the use of these cables for the freesat and freeview cause me problems? They are about 3 metres in length up to the wall socket.