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DTV, KLRN and You.

Great News!

KLRN has doubled its transmitter power.

If you lost our over-the-air signal after the Federal Communications Commission (FCC) shut down analog TV in 2009, or if you tried in the past to get a signal but got too many breakups, too much interference or nothing at all, we urge you to try again.

On Nov. 30, 2011, the FCC approved KLRN's request to double the broadcast power. This greatly expanded our reach to distant viewers and allows us to deliver a stronger, clearer signal to those using antennas.

If you have not received KLRN in the past, just simply re-scan for Digital Channels on receivers. Also, even with the power increase, use an all‐band antenna, which includes both VHF and UHF, to enhance reception. Another note, outdoor antennas always perform better than indoor antennas.

Please help us spread the word. If you know someone who hasn't been getting a good signal from KLRN, let them know they should try again. Viewers may call (210) 270-9000 or send an email to dtv@klrn.org if they have installation, re‐scan or reception questions.

More in the news:

KLRN-DT Over-the-air Reception Issues

Which of the following situations sounds most like your experience?

1. I live in an apartment in San Antonio, cannot install an outside antenna and cannot receive KLRN.

2. I live outside the city of San Antonio, used to receive KLRN just fine but can no longer receive the station.

3. Sometimes I can receive KLRN but the picture breaks up or freezes.

4. I can receive KLRN on one TV in my house, but not another.

If none of these scenarios sounds like your situation or if you have questions that are not covered on the web site, please give us a call or send us an email and we’ll try to help solve the problem.

Final note: KLRN is in the process of applying for an increase in transmitter power to help solve reception and coverage issues. Even though a power increase may help, viewers still need to do everything they can to improve the quality of reception in their locations. Working together, we can solve a lot of the current problems.

Discussion of the individual scenarios

1. I live in an apartment in San Antonio, cannot install an outside antenna and cannot receive KLRN.

There are two common causes of indoor reception problems: You need the right antenna, located and adjusted properly and you need to eliminate causes of electrical interference near the antenna. The right antenna to receive all the San Antonio DTV channels is an all-band (VHF & UHF) antenna – usually a combination of a UHF “loop” and a pair of “rabbit ears.” Once you have hooked up your antenna, you may need to re-scan for new channels before your receiver can “find” KLRN.

You’ll need to experiment with the placement and orientation of the antenna for best reception. It is very unlikely that an amplified antenna will do a better job than a basic set of rabbit ears for receiving KLRN. To begin with, you should extend the telescoping rods to about 16 – 18” on each side and lower the rods to a horizontal position (not sticking up in a V shape.) Rotate the antenna for maximum signal strength.

The other cause of reception problems is electrical noise from things like a microwave oven, the base station of a wireless telephone, fluorescent lights, “bug zappers” – almost anything that uses electricity can cause reception problems. The trick is to separate the antenna from things that cause interference.

2. I live outside the city of San Antonio, used to receive KLRN just fine but can no longer receive the station.

Suburban viewers who used to watch KLRN but no longer receive the station may face one (or both) of the following situations. First of all, viewers outside the city of San Antonio need to have an outdoor all-band (VHF & UHF) antenna pointed toward the San Antonio transmitter sites in southeast Bexar County. There are a lot of “HDTV” antennas that are actually UHF-only designs and these will not receive KLRN. We have experienced excellent results with a Winegard HD 7696 antenna. This model does not have a built-in amplifier and should not need one.

The other issue relates to the terrain between your antenna and ours. If you live “behind a hill” or if there are big buildings between your location and the transmitters, you may need to look into a substantial height increase for your antenna. You might also experiment with looking for a reflected signal on either side of the actual heading for the transmitters. If your location is heavily blocked by terrain, it may not be possible to receive our signal at all.

Another note about antennas: signal splitters greatly reduce the signal level. If you are using a splitter and having reception problems, remove the splitter and try a direct connection to a single receiver and see if that helps.

3. Sometimes I can receive KLRN but the picture breaks up or freezes.

Occasional interference suggests that the signal level you are receiving is low or that there is a high level of electrical noise in your area. Sometimes there are atmospheric changes at sunrise and sunset that can cause the signal to fade. The best solution is to make sure your antenna is in good condition and all the connections between the antenna and receiver are clean and tight. Broken or bent elements can cause problems and damaged wiring is always a bad thing. Also, avoid the use of signal splitters and be sure your antenna is an all-band (VHF & UHF) design and pointed toward the transmitters in southeast Bexar County.

4. I can receive KLRN on one TV in my house, but not another.

Most likely the working receiver is on the side of the house that has the best exposure to the transmitters in southeast Bexar County. With an indoor antenna, you’ll always have a better chance of receiving KLRN when the signal doesn’t have to travel through the entire structure of your house. Metal roofing and aluminum thermal barriers in the attic will block the signal.

Look for sources of electrical noise near the antenna for the set that cannot receive the signal – microwave ovens, base stations for wireless phones, even the TV itself can cause electrical interference, so locate the antenna as far away as possible from noise sources.


06/22/2009: Updated information from the FCC.

Double Rescan & Antenna Adjustments (doc)

Information for Basic DTV Installation Contractors (pdf)

Information for Expert DTV Installation Contractors (pdf)


If you are having difficulties receiving digital television, here are a few tips that might be helpful.


If you’ve already got your converter box connected, be sure to do a COMPLETE RESCAN of ALL channels. You’ll find that there have been DTV channel changes in the San Antonio area.

If you receive KLRN with an antenna on any TV, you’ll need a converter box connected to any older TV that is not DTV ready. Learn more about antennas.

If you currently subscribe to cable or satellite, and have it connected to all of your TVs, you won't need to worry about the switch.

Other television sets will not receive a television signal after the date of the switchover. To keep getting a signal from your older television set, you will need a digital converter box.

Newer television sets
MAY already have a digital tuner built in. You don't have to wait for the digital conversion. You can start receiving digital quality picture and sound and additional channels now without having to sign up for cable or satellite.



As the time for the analog TV shut-down approaches, there are two new FREE services available to help those who have not yet installed their DTV converters or the antenna they need to receive all the local DTV stations. These services have received federal grant funds to help out those who are still unconverted and who watch TV over-the-air. If you know someone who is experiencing difficulty with the DTV conversion, please let them know about these services.

STRAC (South Texas Resource and Assistance Center) received a grant from the FCC for both basic and expert installations.

  • To set up an appointment, please call: 830-393-7888 or 1-866-999-3435
    Hours 8a -8p M-F, Sat 10-6, Sun 10-6
  • Operators are bilingual (Spanish and English)
  • Offices are located throughout KLRN viewing area, including Laredo

INSTALLS, Inc. also received a grant from the FCC for both basic and expert installations.

  • Viewers can set up an appointment through 1-800-582-4250 or https://dtvhelp.installs.com
    Hours: 8am – 9pm, 7 days a week
  • Can assist viewers in both Spanish and English

KLRN-DT Reception Issues and Solutions for Over-the-Air Viewers


The following links provide more information, but you can always contact us with your questions at dtv@klrn.org or 210.270.9000.





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Can't get KLRN's digital channels?
Call us at 210-270-9000 during business hours or visit klrn.org/dtv for some specific steps that might help!