It has a built-in 181-chanel NTSC tuner; you'll need a separate HTDTV tuner to receive 1080i high-definition broadcasts. The 53SDX89B incorporates dual-tuner picture-in-picture technology, which allows you to view antenna inputs on both the main picture and subpicture simultaneously, with separate tuning control for each.

Tech Talk
Aspect ratio: The aspect ratio refers to the shape of the video image. Standard television has a 4:3 aspect ratio, which is almost square in appearance. Digital television will have either a 4:3 or 16:9 aspect ratio, which is widescreen and appears rectangular, looking more like a movie screen and filling more of the viewer's field of vision for a more lifelike viewing experience.

Scanning method: Frames of video are made up of many lines of video that are scanned onto a television screen so closely they appear to be a solid picture. The scanning method can be either interlaced or progressive. Interlaced scanning (also used in today's analog TV), indicated by an "i" in the video format, fills in the odd number lines (1,3,5,7...) and then fills in the even number lines (2,4,6,8...) until the frame is complete. Progressive scanning, "p," fills in each line consecutively until the frame is complete, like a computer display.

What's in the Box
This package contains the 53SDX89B 53-inch projection TV, remote control, 2 AA batteries, and printed operating instructions.