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Closed Captioning - When to Use Your TV vs. Comcast Equipment

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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
Image shows how to connect TV box or DTA to a standard definition TV via coaxial cable or single yellow RCA cable.

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)
Image shows connection between Standard Definition TV box and HDTV using coaxial cable or single yellow RCA cable.

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)
Image shows connection between a high definition set top box and a high definition TV. Connected via HDMI cable or three Component Video cables.

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
Image shows connection between CableCARD device and HDTV via HDMI cable or 3 Component Video cables.

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

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Find this article at:

https://www.xfinity.com/support/cable-tv/enable-closed-captioning/

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