KSAT is now broadcasting NEXTGEN TV signal for antenna users. How to rescan, troubleshoot

This change only affects households that watch television using an antenna

. (KSAT)

KSAT is now broadcasting a NEXTGEN TV signal as of 2 p.m. on May 6, 2024.

NEXTGEN TV is delivered by an over-the-air signal and requires an antenna. It can help reduce or eliminate costly subscriptions by providing more channels to choose from for free. KSAT will offer at least five different channels including ABC, MeTV, Heroes and Icons, Movies and StartTV.

** Important Note: If you do not use an antenna and you watch television through a cable, satellite or streaming service, no action is required.

For antenna users:

  • The most important thing to know if you watch television with an antenna is that you have to rescan your channels after 2 p.m. on Monday, May 6 to continue watching local TV, like KSAT. (Access through your TV settings. Read more about it here.)
  • To receive the full NEXTGEN TV experience, you must have an internet-connected NEXTGEN TV-enabled television (**or a NEXTGEN TV converter box) and use an antenna. **A warning on the NextGen TV converter boxes: The currently available converter boxes don’t seem to be reliable. KSAT engineers have tried five versions and none of them worked.

Tips for rescanning for all antenna users

You need your TV remote to rescan. The process could vary depending on the brand of television that you have. Find the settings or menu option and look for menu options like “Channels,” “Rescan,” “Autotuning,” “Add Channels,” or “Antenna.” If you’re not sure how to rescan your antenna, the FCC has a helpful chart that provides step-by-step instructions for several television brands.

If after a rescan, you still don’t see your local channels, move your antenna and rescan again.

  • Flat panel or square antennas don’t seem to work very well.
  • It is best to get an outdoor antenna but if that isn’t possible, rabbit ears or a newer antenna might help.
  • Try moving your indoor antenna near a window to help reception.

You’ve rescanned, but can’t get the signal — now what? Here are some FAQs and explanations:

Why can I get 12.2 and 12.4 but not 12.1 or 12.3?

Basically, the channels broadcast on a different frequency and from different locations. KSAT’s 12.2 and 12.4 signals are broadcast on a UHF signal while 12.1 and 12.3 are broadcast on a VHF signal. It may take some experimenting with antenna placement to get them both.

Where should I aim my antenna?

The KSAT signal is being broadcast from the Elmendorf/Calaveras Lake area (southeast Bexar County). Try facing your antenna in that direction. If you have an antenna with “rabbit ears” make sure they are extended fully and are perpendicular to the direction of southeast Bexar County. Depending on how close you are to the area, you may have to adjust to find the sweet spot. Remember to rescan each time you reposition your antenna.

Aim your TV antenna toward the area where the bullseye is on the map to get the KSAT signal. (Google Map/KSAT)

My outdoor antenna isn’t working, what should I do?

We DO NOT recommend that anyone get on a ladder or on their roof to adjust their outdoor antenna. Instead, please call the person who installed it for you and have a professional do it.

I want to get an outdoor antenna. Who should I call?

It may not be easy to find a qualified person to install your antenna. Please look for a professional service.

I want to buy a new antenna. What should I look for?

If you buy a new antenna, make sure you get a receipt and that you’re able to return it for a refund or exchange if it does not work in your home. Again, flat panel or square antennas are not ideal because they may not pick up enough of the signal. The best antennas are outdoor antennas on a pole. (See above for installation options.) You can also get a new indoor antenna. It needs to receive both UHF and VHF signals. Be sure to rescan your new antenna after you install and connect it.

I’ve lost my TV remote control. How do I rescan?

If you do not have a TV remote control, you may not be able to rescan. You may need to contact your TV manufacturer for a replacement.

How else can I watch KSAT?

You can watch KSAT over-the-air with an antenna, with a cable or streaming service or you can stream KSAT 12 local programming for free on most smart TVs, streaming devices and even your phone. Get more information about our streaming apps here.

I still need help!

  • Please use our KSAT Help Desk if you have issues. If you are still having trouble tuning in to KSAT 12, you can email fdaniels@ksat.com or call (210) 351-1251.


NEXTGEN TV (also known as ATSC 3.0) is the latest digital television technology. It combines over-the-air broadcasts with the internet. Features of NEXTGEN TV include:

Brilliant Video

With NEXTGEN TV, you can immerse yourself in stunning video with brilliant color, sharper images and deeper contrast that’ll make you feel like you’re really there. NEXTGEN TV video capabilities include 4K, UHD, and HDR.

Enhanced Audio

NEXTGEN TV provides consistent volume across channels while Voice + dialogue enhancement allows you to hear every voice clearly. Voice + is available to viewers the moment the NEXTGEN TV is set up. NEXTGEN TV uses the Dolby AC-4 audio codec.

Interactive & Personalized Content

NEXTGEN TV will be enhanced with internet content to get the most out of live sports, live news, live events and more, in real time. With NEXTGEN TV, local stations can personalize their news, sports, live events and shows with interactive features.

Upgradable for the Future

The NEXTGEN TV you buy today is designed to be upgradable with the advancements of tomorrow. TV manufacturers are able to update NEXTGEN TV sets connected to the internet to accommodate emerging NEXTGEN TV features that will be launched by broadcasters.

Watch this video for more information about NEXTGENTV

What kind of television do I need?

If you plan on getting a new TV, just make sure it is NEXTGEN-ready. Many new TVs will have NEXTGEN capabilities but there are also many brands that don’t. Be sure to ask.

What if I have a NEXTGEN TV already?

If you already have a NEXTGEN TV you will have to rescan the channels after the switch to get the new signal. Your existing antenna will work with the NEXTGEN signal.

Can I get the NEXTGEN signal if I have an older TV?

There will be solutions available for older TVs. These will be coming later this year. The currently available converter boxes don’t seem to be reliable. KSAT engineers have tried five versions and none of them worked.

If you have any questions or are having trouble tuning in KSAT-12 you can email email fdaniels@ksat.com or call (210) 351-1251.

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