A TV tuner is the hardware that lets a TV receive free over-the-air broadcast channels from an antenna. It is what turns a coax antenna signal into watchable local channels such as ABC, CBS, FOX, NBC, PBS, and independent stations.
This applies mainly to flat-panel TVs sold in the United States, where most TVs include an ATSC tuner, but some streaming-focused displays do not.
Does this affect you?
Use this if you are shopping for a TV, connecting an antenna, or seeing the word tuner, ATSC, RF, ANT, or NextGen TV in a spec sheet.
Check whether your TV has a tuner
- Look on the back or side of the TV for a coaxial ANT, Cable, or RF input.
- Search the TV model number on the manufacturer’s support site.
- Look in the specifications for Tuner, ATSC, ATSC 1.0, or ATSC 3.0.
- Connect an antenna to the coax input.
- Run a channel scan from Settings > Broadcast, Channels, Antenna, or Cable setup.
If the scan finds local channels, the tuner is present and working. A coax antenna input is usually a strong sign the TV includes one.
ATSC 1.0 and ATSC 3.0
Most TVs with tuners from the last 15 years use ATSC 1.0, the digital broadcast standard used after the U.S. digital transition. It carries standard and high-definition local channels and remains widely used.
ATSC 3.0, also called NextGen TV, is a newer broadcast standard with support for better signal handling, improved audio, and potential 4K broadcasts. It is rolling out city by city, and not every current TV supports it.
If NextGen TV matters to you, check coverage in your area and confirm the TV specifically lists ATSC 3.0.
When you do and do not need one
If you only watch streaming apps, cable box HDMI, or a streaming live-TV service, a missing tuner does not affect you.
If you want free local channels with an antenna and no internet or subscription, you need a tuner. If the TV lacks one, buy a standalone ATSC tuner or digital converter box and connect it to the TV over HDMI.
Some lower-cost smart displays and computer monitors sold for streaming skip the tuner to reduce cost, so do not assume every TV-shaped screen can scan antenna channels.
Sources
- FCC – ATSC 3.0 NextGen TV transition overview (2025)
- Consumer Technology Association – Understanding ATSC broadcast standards (2024)
- Samsung Support – Set up your TV’s built-in tuner for antenna channels (2025)