I'm stuck in Manhattan trying to get a good signal for my Time Warner Cable dTV boxes. The main line running around the perimeter of my apartment is a "Quad 6" line, so the wiring shouldn't really be an issue. However, the signal does degrade the further I place the TV's from where the line comes into the apartment. Even where the line comes into the apartment the signal is weak. I'm thinking of using a booster to amplify the signal, but I'm not sure what effect it will have on the digital cable. Any ideas? Thanks!