When and how to rescan for channels

A channel scan is a snapshot. The box walks the whole broadcast band, notes every station it can decode at that moment, and saves the list. Nothing updates that list on its own, which is why the single most useful habit in broadcast TV is knowing when to take a fresh snapshot.

When a rescan is the answer

• You moved the antenna, even slightly, or moved to a new home.
• A channel you used to get has gone missing.
• Stations in your area changed frequencies; this genuinely happens, and the fix is a scan.
• Trees leafed out or a building went up between you and the towers.
• The box is fresh out of the package and showing its first menu.

How to run it

1. Confirm the antenna cable is snug on ANT IN.
2. Open the setup menu with the remote and choose the channel search, usually named Auto Scan.
3. Let it run to the end without interrupting; a full sweep takes a few minutes.
4. Browse the results with the channel keys and the program guide.

A rescan replaces the old list, so a channel that disappears after scanning was not deleted; it failed to decode this time. That is information, not damage, and it usually points at the antenna.

Reading the signal meter

Inside the menu lives a signal strength display, and it turns antenna placement from guesswork into a game with a score. Tune to a troublesome channel, open the meter, and have someone move the antenna while you watch the bar. Higher and toward a window almost always raises it. When the bar sits comfortably high and steady, scan once more and lock the position in.

If the count is still low

Check the cheap suspects in order: a loose coax connector, a cable pinched under furniture, an amplifier with its power unplugged, an antenna facing the wrong direction. Each is fixed in a minute and each can cost a dozen channels. Placement rules and antenna types get their own space in our antenna basics guide.