How to Combine an HDTV Satellite Box and a Rooftop Antenna

by David Lipscomb Google

    Although many local broadcasters transmit their high definition content over DirecTV and Dish Network, there may be some channels available you can only get over-the-air. Additionally, terrestrial HD broadcasts received over an antenna remain the highest quality available, using far less compression to maintain a higher level of picture quality. Many modern satellite dishes and decoders no longer require the use of an external diplexer to combine the outputs of a rooftop antenna and the dish itself, accessible through your DirecTV or Dish Network satellite box.

    DirecTV

    Step 1

    Route a coaxial cable from both the satellite dish and antenna to a point on the structure nearest the DirecTV satellite box.

    Step 2

    Drill a half-inch hole from the inside of the structure through the outside wall by the coaxial cable drop.

    Step 3

    Feed the cables one by one through the hole in the wall. Pull the leads to the back of the DirecTV box.

    Step 4

    Screw the cable from the satellite dish to the "Signal to IRD" input on the SWM box. Screw a second shorter cable from the "Power to SWM" output to the "SATELLITE 1" or "SWM" input on the back of the decoder. If necessary, this output may be routed to a high-bandwidth splitter. Plug the SWM module into a nearby A/C outlet.

    Step 5

    Connect the antenna feed to the "Off Air In" coaxial port on the decoder. Arrange the cables neatly to minimize visibility, without putting stress on the wires.

    Step 6

    Seal the hole in the structure around the cables with the silicone caulk, applying it inside and out.

    Dish Network

    Step 1

    Double-check your Dish Network decoder to ensure you can add an antenna. Units featuring integrated over-the-air tuners include the ViP 211 HD, Duo ViP 211k HD, Duo ViP 222 HD, Solo DVR ViP 612 HD DVR, DuoDVR, ViP 622 HD DVR and the DuoDVR ViP 722 HD DVR.

    Step 2

    Route a coaxial cable from both the satellite dish and antenna to a point on the structure nearest the Dish Network satellite box.

    Step 3

    Drill a half-inch hole from the inside of the structure through the outside wall by the coaxial cable drop.

    Step 4

    Feed the cables one by one through the hole in the wall. Pull the leads to the back of the Dish Network decoder box.

    Step 5

    Screw the coaxial cable leading from the antenna into the "Over The Air Antenna In" coaxial port.

    Step 6

    Screw the coaxial lead from the Dish Network satellite into the blue-tipped coaxial input labeled "Satellite In."

    Step 7

    Apply silicone to the entry and exit holes, around the coaxial cables, to prevent moisture intrusion into the structure.

    Tips

    • Be sure to use screw coaxial caps onto any unused splitter outputs, should you need to feed multiple decoders.
    • Note that Dish Network models DuoDVR ViP 722 or Duo ViP 222k HD do not have integrated over-the-air compatibility. If your unit does not have the coaxial "Over The Air Antenna In" input on the back, contact Dish Network and order the recommended adapter.

    Required Items

    • Terminated RG-6 coaxial cable
    • Power drill
    • 1/2-inch drill bit
    • Silicone caulk

    About the Author

    David Lipscomb is a professional writer and public relations practitioner. Lipscomb brings more than a decade of experience in the consumer electronics and advertising industries. Lipscomb holds a degree in public relations from Webster University.

    Photo Credits

    • Siri Stafford/Digital Vision/Getty Images