Hello to all, complete newbe..I am after a bit of info regarding cctv insatllation set up..I have no problems fitting the cameras in the eaves which will go back to a dvr in the loft which I will put on motion detector but my problem is that if I hear a knock or noise outside I would like to be able to view on my tv downstairs who is at the door. I want to avoid running another cable from the loft to downstairs room if possible ..I already have the ariel feed coming into the loft and then cable going downstairs on a booster could I somehow use this and if not would I have to run another cable and what cable would I have to use or is there any type of wireless connection?.The reason I do not want another cable is that I have all the house rendered and painted so a cable would be a eyesore and running internally is out of the question..