Just installed an OTA Antenna in attic for my brother. Excellent signal picking up all channels from towers. Brother did not complete due diligence on his coax cable setup. Attic is above garage and we are able to send the ota signal down to his basement to where all of the Directv Genie and Clients are connected (Directv Splitter basement). He only wants to have OTA signal to his office but the ONLY way to get to his office is by piggy backing on Directv cable from the Directv Splitter (basement) to Directv Client (basement). I understand that the Directv MOCA signal might affect the OTA signal but, what happens if we block the Directv MOCA signal to the Directv Client. Is it rendered useless? Can you still watch Directv just no DVR'd shows? OTA Coax / Satellite Coax => Diplexer => Coax Cable (Other Side of Basement) => Diplexer => OTA Coax / Satellite Coax Would a "band stop filter" work between Directv Splitter and Diplexer (Satellite IN)? Thanks for your help.