Can I check the signal strength for TV reception myself? My mum was having a new aerial installed today, so I figured I'd take the opportunity to have a word with the installer. Due to where I live, I currently have a loft mounted aerial. Speaking to him, he says it's possible I may get digital reception with a newer internal aerial, but he'd need to measure the signal strength to see if it's possible. Otherwise I'd need an external aerial, and I need to find out if I'm allowed to fit one (the house is inside the curtalege of a listed building, so there are some restrictions). The main reason for asking, is that this guy will charge me over £160 for a new aerial and installation. If I can get away with an internal aerial, I should be able to sort myself for about half that! So back to my original question - can I check the signal strength myself, or will I need to get someone out to do it for me?