Connect a digital adapter to an HDTV
Updated
6/18/2012 8:18:03 PM
by
Comcast Expert
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Introduction
Want to use your DTA (Digital Transport Adapter) to receive stunning HD broadcasts on your HDTV? Here’s everything you need to know.
Connect your Digital Transport Adapter (DTA)
To connect your digital adapter to your HDTV and continue receiving broadcast HD channels, you’ll need a splitter, five coaxial cables, and an A/B switch (available at an additional charge through Comcast in some areas).
- Connect one end of a coaxial cable to the cable wall outlet.
- Connect the other end of that coaxial cable to the IN of a splitter.
- Connect a coaxial wire from one OUT of the splitter to one IN of the A/B switch.
- Connect a coaxial wire from the other OUT of the splitter to the IN of the digital adapter.
- Connect a coaxial wire from the OUT of the digital adapter to the open IN of the A/B switch.
- Connect a coaxial wire from the OUT of the A/B switch to the IN of the television.
Note: If your HDTV has two RF inputs, you do not need an A/B switch—you can connect the outputs of the splitter directly to the two RF inputs on your TV.

Watching programs
By flipping the A/B switch, you will view either:
- Limited basic and broadcast HD channels.
- Expanded basic/starter channels in digital format.
If you have connected your splitter directly to your HDTV, you will need to select alternate inputs (RF1 or RF2) on your TV instead of flipping the A/B switch.
Having trouble?
- Make sure your TV and digital adapter are both set to channel 3 unless instructed otherwise.
- Keep your digital adapter on at all times. Use your Comcast remote control to turn your TV on or off. If your remote control isn’t working, make sure its batteries are fresh and that it’s been programmed correctly. (You can also find programming steps in the Comcast DTA Remote Guide).
- The digital adapter supports a screen aspect ratio of 4:3; your picture will not fill the screen of a widescreen television. You cannot adjust the aspect ratio on the digital adapter, but you may be able to “stretch” your picture in your television’s Settings menu. To receive HD programming, upgrade to a digital cable box or HD cable box (available at an additional cost).