![]() ![]() In this past, this roughly translated to “if the TV ain’t working, scan for channels.” But right now, America is undergoing a broadcast TV transition. That means you have to rescan every time you move, every time you buy a new TV or antenna, and every time a local TV station changes to a different broadcast frequency. You need to scan for channels every time there’s a change in local broadcast frequencies. Naturally, that list needs to be updated every once and a while, and you have to start the scanning process all over again. Then, when you go to watch TV later, you’re just flipping through that list. The TV slowly runs through every possible television frequency, making a list of each available channel along the way. Weird, huh?ĭo you know how old TVs (and radios) had to be tuned to stations by hand? Well, when you scan for channels on a TV, it’s basically performing that process for you. Instead, your TV keeps a list of which stations are available. You’d expect a TV to know which local stations are available, like a radio, but that isn’t the case. And like any 20-year-old technology, it’s a little quirky. Digital television (ATSC 1.0) has served as the standard for free, broadcast TV since the ’90s. ![]()
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