How to Upgrade Your HDTV Definition CapabilityAdding full high definition capability to your HDTV upgradeable TV is simple, but you need to keep in mind a couple things. To receive HDTV broadcasts, you will need a special antenna. With HDTV on DIRECTV, you will need a special satellite dish. And of course, you need the receiver. An HDTV receiver is similar to a conventional cable box. You connect it to your HDTV upgradeable set and use the receiver to switch channels.
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