I'm in the process of re-routing/rewiring my DirecTV and OTA setup. I've already completed the DirecTV side (SWM-8 to 2 HR2x and a H21). The OTA side is an 8-bay UHF with a pre-amp mounted at the antenna and a distribution amp in the house. I would like to combine my OTA line in to my DirecTV line. I know that the SWM-8 has an OTA in but unsure of which diplexer I would need. I'm not sure if the power to the OTA pre-amp can be used with a diplexer. I've included a diagram of my current setup. Only the computer and the HDTV connected to the HR21 need to have OTA. EDIT: The OTA would run on the 100' RG6 to the 2 HR2x. There is no DECA. I use "unsupported" ethernet for MRV.