This may be a dumb Question. The installer was'nt very helpful. I did'nt buy Directv OTA because I have an 8' OTA. on the roof. I have a TriLNB and when I hook the the roof OTA. to the HR10-250 rf port it says it get no signal. Then I tried the OTA that came with my ATI HDtv wonder(which pulls over 20 DTV and HDTV channels on my PC) still nothing. Thanks for any input.