Bobbo, I believe that this is the issue. There is only one coax connection on the outside. On the inside, there is a plate with aux/sat on one connection, and a connection for the HD over air antenna mounted on the roof. I'm sure that the connection on the outside is split using "regular" splitters, running to three connections for three TVs on the inside. I believe that I will need to run another parallel line from the outside to the main area on the inside, where I want to hook the Directv satellite dish to. From there I'll probably need a diplexer to run lines to the other two TV connections. Thanks for your help.