I have a directv hd receiver set up in living room with hdmi cable to tv. I have also ran a 75 coax from back of the directv receiver to a room about 40' away. I know both tv's will be on the same directv channel. That's OK. I am trying to convert the 75 coax to an hdmi type connection to the tv. When I try to run the coax directly to the tv I am not getting a good picture (says 480) at all. I am assuming I need some type of converter to go from 75 coax in to hdmi connection out. Any help or suggestions would be appreciated.