Your owner’s manual will be very specific about its capabilities.
Also, if you have an HDTV, it will be labeled that way on the front.
Many DTVs will have labels or markings indicating they contain digital tuners, including the phrases Integrated Digital Tuner, Digital Tuner Built-In, Digital Receiver, or Digital Tuner, DTV, ATSC, or HDTV (High Definition television). Look for these labels on your television or check your manual.
If your television set is labeled as a Digital Monitor or HDTV Monitor, or as Digital Ready or HDTV Ready, this does not mean it actually contains a digital tuner. Thus, you still will likely need a separate set-top box which contains a digital tuner in order to view over-the-air digital programming.
Over-the-air digital set-top boxes for digital or HD monitors can be purchased at retail stores. Cable and satellite TV providers also sell or lease digital set-top boxes for their specific services.
(Note: the digital set-top box described here is not the same as the digital-to-analog converter box used to convert free over-the-air digital broadcasts for viewing on an analog TV set.)