Learn when to use your TV to turn on Closed Captioning and when to use your Comcast TV box, digital transport adapter (DTA) or CableCARD.
Typical Equipment Configurations
The best way to turn on the Closed Captioning feature depends on what kind of Comcast device and TV you have. We've outlined a few of the different setups to help point you in the right direction. Note: Audio connections are not shown in the illustrations below.
Standard Definition TV with Standard Definition TV Boxes or DTAs
You’ll need to use the Closed Captioning features built into your TV. It is likely that the standard definition TV box or DTA is unable to send and receive Closed Captioning.
Standard Definition TV with High Definition TV Boxes (with or without DVR)
You can use either the TV box or the TV to turn Closed Captioning on or off. If you accidentally turn Closed Captioning on in both, you'll see a double layer of captions.
High Definition TV with High Definition TV Boxes (with or without DVR)
You will need to use the TV box. Closed Captioning should be turned off on your TV to avoid the chance of double layers of captions.
On High Definition TV with a CableCARD
You’ll need to use the CableCARD device to turn Closed Captioning on or off.
Learn How to Set up Closed Captioning on Your Devices