Connect your antenna to the TV's coaxial input, then scan for channels

Most smart TVs have a coaxial input — a round port labeled "ANT IN" or "RF IN" on the back or side. Screw the antenna's coaxial cable (the thick cable with a metal connector) into this port until it's snug. Then go to your TV's settings menu, find the channel scan or auto-tune option, and let the TV search for available channels. This takes two to five minutes and finds every broadcast channel your antenna can receive in your area.

The whole process works the same way whether your TV is a Samsung, LG, Sony, or any other brand. The port location and menu names vary slightly, but the steps are identical. If your TV doesn't have a coaxial input — rare, but it happens on some very new models — you'll need a separate digital tuner box, which we cover below.

Key Takeaways

  • The coaxial cable screws into the ANT IN or RF IN port on the back of your TV until hand-tight.
  • After connecting the antenna, open your TV's settings menu and run the channel scan or auto-tune function to find all available channels.
  • Position your antenna in a window or high location for the strongest signal, and experiment with direction if you're not picking up all channels.
  • If your TV has no coaxial input, you can use a digital tuner box that connects via HDMI and does the channel scanning for you.
  • Once channels are scanned, they stay in your TV's memory even if you unplug the antenna, so you only scan once.

Locate the antenna port on the back of your TV

Turn your TV around or look at the back panel. You're looking for a round port about the size of a pencil eraser with a threaded metal ring around it. It will be labeled "ANT IN", "RF IN", "ANTENNA", or sometimes just "TV". On some models it's on the side panel instead of the back. If your TV is mounted on a wall, you may need to look behind the mount or use a flashlight to see the ports clearly.

The port looks similar to a cable TV input, because it uses the same connector type. If you see multiple round ports on the back, check the labels next to each one. You want the one marked for antenna or RF input, not HDMI, audio, or other connections. If you're unsure which port is which, your TV's manual (available on the manufacturer's website by searching the model number) will show you exactly where it is.

Attach the antenna cable and position the antenna

Take the coaxial cable attached to your antenna and line up the connector with the ANT IN port. Push it in gently and turn the metal ring clockwise until it stops. It should be snug enough that it doesn't wiggle, but you don't need to force it — hand-tight is correct. If the cable is too short to reach the port, you can buy a coaxial extension cable at any electronics store for $10 to $20.

Position your antenna in a window or as high as possible in your room. Broadcast signals travel in straight lines, so higher placement and a clear line of sight to the broadcast towers in your area work best. If your antenna came with a stand, use it. If it's a flat antenna, you can tape it to a window or wall. Experiment with different directions — rotate it 45 degrees and rescan channels to see if you pick up more stations. Some areas have towers in multiple directions, so the best position may not be obvious.

Scan for channels using your TV's menu

Pick up your TV remote and press the Menu or Settings button. Look for an option called "Channel Scan", "Auto Tune", "Tuner Setup", or "Search for Channels". The exact name depends on your TV brand. Once you find it, select it and the TV will begin searching. You'll see a progress bar or a message saying it's scanning. This process takes between two and five minutes.

Do not unplug the antenna or move it while the scan is running. When the scan finishes, your TV will display the number of channels it found and ask if you want to save them. Select yes. The channels are now stored in your TV's memory. You can unplug the antenna after this point if you want — the channels will stay there. If you want to watch live TV again later, just plug the antenna back in and turn on the TV.

Troubleshoot if you're not finding channels

If the scan finds zero channels or far fewer than you expected, the antenna position is usually the problem. Move it to a different window or higher up on a wall and scan again. Try rotating it 90 degrees. If you live in a rural area or far from broadcast towers, you may genuinely not have many channels available — you can check what's broadcast in your area by entering your zip code at websites like TVFool.com or AntennaWeb.org.

Make sure the coaxial cable is screwed in firmly and that the connector isn't bent or damaged. A loose connection will cause weak signal or no signal. If the cable came with your antenna and looks old or frayed, try a new coaxial cable. Also check that you're using the correct input port — some TVs have multiple coaxial ports for different purposes, and selecting the wrong one in your settings menu will prevent the scan from working.

Use a digital tuner box if your TV has no antenna port

Newer smart TVs almost always have a coaxial input, but if yours doesn't, you can use a separate digital tuner box. This is a small device that connects to your TV via HDMI cable and does the channel scanning for you. Popular models include the Mediasonic HOMEworx and the Winegard Connect. They cost $30 to $60 and work with any TV that has an HDMI port.

Connect the antenna cable to the tuner box's antenna input, plug the tuner box into power, and connect an HDMI cable from the tuner box to any HDMI port on your TV. Switch your TV to that HDMI input and run the channel scan through the tuner box's menu instead of your TV's menu. The tuner box will find and store the channels, and you'll watch live TV through the tuner box rather than your TV's built-in tuner. This adds one extra device, but it works just as well as a built-in antenna port.

Frequently Asked Questions

Do I need to scan for channels every time I plug in the antenna?

No. Once you've scanned and saved the channels, they stay in your TV's memory permanently. You only scan once. If you move to a different city or want to find new channels that may have started broadcasting, you can run the scan again and the TV will add any new channels to your list.

Can I use the same antenna for multiple TVs?

Yes, but only one TV at a time with a single antenna. You can buy a coaxial splitter (a small device with one input and two outputs) for $5 to $10, which lets you connect one antenna to two TVs simultaneously. The signal will be weaker on both TVs, so this works best if you're close to broadcast towers. For more than two TVs, you may need an amplified splitter.

What if I get a message saying "no signal" after connecting the antenna?

Check that the coaxial cable is screwed in tightly and that the connector isn't bent. Move the antenna to a window or higher location and try again. If you still get no signal, make sure you're running the channel scan from the correct input — some TVs require you to select "TV Tuner" or "Antenna" as the input source before the scan will work.

Will a longer coaxial cable weaken the signal?

Longer cables do lose some signal strength, but the loss is small over distances under 50 feet. If you need a cable longer than that, buy a coaxial cable rated for TV use (not internet cable) and consider an amplified antenna or a signal booster to compensate. Standard coaxial extension cables work fine for most setups.

Can I connect an antenna and cable TV to the same TV at the same time?

If your TV has two coaxial inputs, yes — one for antenna and one for cable. Most TVs have only one. If you have cable TV and want to use an antenna as well, you can use a coaxial splitter to connect both to the same input, but you'll only receive one signal at a time and will need to switch between them manually in your TV's input settings.