Submitted by Linsey Knerl on March 28, 2008 - 06:32.
"Your television has an analog tuner, also called an NTSC tuner, if it is a picture-tube TV bought before 1998, a smaller LCD set (15- to 18-inch screen), or is a set that was sold as HD-ready. If you have an analog TV and are receiving over-the-air broadcasts via an antenna you need to take action to continue to receive broadcast signals after Feb. 17, 2009.
Your television is more likely to have a digital tuner, also called an ATSC tuner, if it is a 25-inch or larger TV purchased since 2005. To confirm that your TV is digital, you should check the instruction manual for a statement that the TV has a digital tuner. If you don’t have the manual handy, look for a menu function that allows you to scan for digital channels; this is typically in a submenu sometimes called “set-up” or “channels.”
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You most likely have analog if....
Submitted by Linsey Knerl on March 28, 2008 - 06:32.
"Your television has an analog tuner, also called an NTSC tuner, if it is a picture-tube TV bought before 1998, a smaller LCD set (15- to 18-inch screen), or is a set that was sold as HD-ready. If you have an analog TV and are receiving over-the-air broadcasts via an antenna you need to take action to continue to receive broadcast signals after Feb. 17, 2009.
Your television is more likely to have a digital tuner, also called an ATSC tuner, if it is a 25-inch or larger TV purchased since 2005. To confirm that your TV is digital, you should check the instruction manual for a statement that the TV has a digital tuner. If you don’t have the manual handy, look for a menu function that allows you to scan for digital channels; this is typically in a submenu sometimes called “set-up” or “channels.”
This was taken from a VERY good article at consumerreports.org. See the full text here.