No Signal on Lubbock, TX channel 11.1 but receive all others
I receive all digital channels from Lubbock, Tx but 11.1. Channels 14.1,22.1 and 46.1 are weak but stay locked in and receiving signal most of the time. Channels 13.1, 28.1 and 34.1 have excellent signal and work great. Channel 5 (PBS) station is weakest station but works ok at times. Channel 11.1 will not go all digital until June 12, 09. I get no-signal on channel 11.1 at all times. I have an outside antenna (VHF/UHF) about 30 ft. high. I do get anolog pass thru on my magnavox digital to analog converter box but the analog quality is very poor. I don't believe it is a signal strength problem as there is very little snow in analog picture background. There appears to be a lot of interference in the analog signal. Lots of color lines and diagonal lines. Channels 14.1 and 46.1 also still broadcast analog and their signals do not have interference. They are weak and have snow in the background but I receive them ok. According to FCC maps channel 11 is weak here but should have sufficient signal to be received. I believe that their analog and digital carrier frequencies are causing interference to each other. Just my opinion as I have no way to check this. I would appreciate any assistance or information that you can come up with.
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Re: No Signal on Lubbock, TX channel 11.1 but receive all...
When the Government decided to make all stations go digital, most places we're telling about the change over. But what they forgot to mention to the ones like you that you may have to change your outside antenna. They make antenna just for picking up digital signal. So you may have to change that also. be Sure and check the cable going from the ant. to back of the converter box is in good condition or may have a break somewhere that could cause more trouble. If you see any bad places on the cable you may want to replace it now when you do the antenna. biigg53566
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What type of antenna installation are you using? Do you have it aimed at your local transmitters? Do you have tall trees or buildings that could block the signal? Do you get signal from a low-power analog station in your area (pass-through or direct)? If you have an analog station with a transmitter near that of the digital ones, you'll have some idea of if the antenna is pointed correctly. (Digital signals do not get tuned in the way a weak analog signal does. There is no poor picture option; you either see it or you don't).
Go to antennaweb.org or tvfool.com for information on station transmitter locations that you should be able to receive (if in the US). Just enter your address. Antennaweb is very conservative in the channel list even though it assumes an external antenna. Tvfool gives recommended antenna types for each transmitter in your area. The antennas are labeled with a color code by the manufacturer.
If you are sharing the OTA signal from your antenna with several TVs, you may need an amplifier.
I've had one D-T-A box fail due to a lightning strike hitting the antenna; the tuner was damaged by the power surge. I've also had amplifiers that lost the VHF (2-13) channels after a surge. If you have a lightning protection system, check it as well. The simplest diagnostic for these problems is checking if a new D-T-A box or a TV with a digital tuner can scan the channels and then check what the signal strength is for those channels.
Some tuners are more sensitive and will receive a channel that another tuner might not see as a strong enough signal. An amplifier can be useful in this case as well. (With the amplifier that got hit by lightning, one TV was still receivng channel 7 but the signal strength was 1 out of 7. The other TV got no signal due to a weaker tuner. Since that channel was from the closest transmitter, the amplifier was checked once the antenna direction was confirmed to be unchanged.)
I hope this helps.
Cindy Wells (Antenna type, tall trees and direction are big issues. I set up a neighbor's DTA with an indoor antenna that got one set of stations. Due to placement issues, their other TV got a different pair of stations with another indoor antenna.)
Channel 19 actually broadcasts on VHF channel 11 (approximately 201MHZ) and channel 25 actually broadcasts on UHF channel 15 (approximately 479MHZ). I know that sounds a bit weird but it has been done so that stations don't have to change there "call" channel number when we switched to Digital TV.Your digital converter box keeps track of this.This is important to understand because you need and antenna that is good at picking up both UHF and VHF signals.If you're not getting channel 19 it may be due to a poor VHF portion of your antenna.If your using a basic old set of rabbit ears for your antenna that has a loop in the middle then I might have a trick for you. Most rabbit ears have 2 telescopic antenna elements.Extend or collapse until each length is 14.7 inches long. (Which is a quarter wavelength at 201MHZ). You are effectively tuning (Optimizing) your antenna specifically for that channel 19.You may need to rotate your antenna a bit to find the best signal.
There are other factors which can hinder you receiving channel 19 but this is a good starting point.Let me know what type of antenna you have.Hope this helps.
Use an Antenna that Provides Good Reception of All Channels
Most existing antennas used by consumers will provide good reception of DTV signals. (Before making any changes, try your existing antenna first to see of it allows you to receive all the stations you normally watch.)
For watching DTV signals, you will need an antenna that provides good reception of both VHF signals (channels 2-13) and UHF signals (channels 14-51) to reliably receive all of the digital signals broadcast in your area.
Many antennas are designed only for reception of either VHF or UHF signals (but not both). For example, the commonly used “rabbit ears” indoor antenna is only suitable for receiving VHF signals. To receive UHF signals, an indoor antenna should also include a wire loop or other feature for reception in that band.
The reception capabilities of TV antennas also vary considerably, so be sure to talk to retail consultants and look at information on the packaging and/or the Internet to make sure that any new antenna you may choose provides good reception of both VHF and UHF channels. In addition, if you use an indoor antenna and receive signals on VHF channels, you may need to use an antenna with amplification.
Many antennas currently being sold as “HDTV Antennas,” perform best at receiving UHF signals; some of these models state that they provide reception of signals on channels 7-13 but actually perform less well receiving those channels. If you obtain one of these antennas, be sure it provides good reception of all the VHF channels as well as the UHF channels.
Check that your digital-to-analog converter box or digital television is connected properly. Make sure your antenna is connected to the antenna input of your digital-to-analog converter box or digital television. If using a digital-to-analog converter box, also ensure that the antenna output of your converter box is connected to the antenna input of your analog TV. Refer to the owner’s manuals of your components if you are unsure of the proper connections.
Ensure that your components are plugged in and have their power turned on.
If you have a digital-to-analog converter box, tune your analog TV to channel 3. You should see a set-up menu or picture displayed on your TV screen. If you do not see a set-up menu or picture, tune your TV to channel 4. If you still do not see a set-up menu or picture, recheck your connections.
Perform a Channel Scan
Digital-to-analog converter boxes and digital televisions have a button, usually on the remote control, that is labeled “set-up” or “menu” or some similar term. Press that button to access the set-up menu. Using the directional arrow buttons on your remote, scroll to the option that allows you to perform a “channel scan.” The channel scan will automatically search for digital broadcast channels that are available in your area. Consult the owner’s manual of your digital-to-analog converter box or digital television for detailed instructions on how to perform a channel scan for your device.
Once the channel scan is complete, you will be able to tune to the digital channels received by your antenna. You should perform a channel scan periodically to check whether additional digital channels have become available.
Adjust Your Antenna
Small adjustments to your antenna can make a big difference in the number of digital channels you can receive. If you have an indoor antenna, try elevating it and moving it closer to an exterior wall of your home. After adjusting your antenna, perform another channel scan to see if your reception is improved.
While adjusting your antenna, it may be helpful to access the “signal strength meter” on your digital-to-analog converter box or digital television to determine whether your adjustments are improving the signals’ strength. The signal strength meter is usually accessed through the menu feature on your remote control. Refer to the owner’s manual of your device for detailed instructions on how to access its signal strength meter. Remember to do another channel scan after you have adjusted your antenna.
Television stations broadcasting in digital use both the VHF band (channels 2-13) and UHF band (channels 14-51). Many indoor antennas use “rabbit ears” for the VHF band and a “loop” or “bow-tie” antenna for the UHF band. Make sure you are using an antenna that covers both the VHF and UHF bands and have connected it properly.
If You are Still Having Difficulty:
Until June 12, 2009, some stations will be operating at reduced power levels. If you are not receiving certain digital TV stations, this does not necessarily mean there is a problem with your antenna or digital-to-analog converter box or digital television. Check with the TV station to find out whether they are planning changes that will improve reception.
When an analog TV signal is weak or receives interference, static, snow, and distortion will often appear on the screen. Digital broadcasting will provide a clear picture; however, if the signal falls below a certain minimum strength, the picture can disappear. This “cliff effect” means that if you watch analog TV stations that have static and distortion, you may have to adjust or upgrade your antenna system.
Simple indoor antennas provide minimal performance that may not be suitable for your location. If you are unable to obtain satisfactory DTV reception with your current indoor antenna, you may wish to obtain an indoor antenna that includes features for better reception of UHF signals, as well as VHF, and/or an amplifier to boost the received signal (often referred to as an active indoor antenna).
Generally, an outdoor antenna will get better reception than an indoor antenna. However, the performance of outdoor antennas can degrade over time due to exposure to the weather. If you are having problems, check for loose or corroded wiring, broken antenna elements and that the antenna is pointed in the right direction.
Try to keep the length of wire between your antenna and digital-to-analog converter box or digital television as short as possible for best reception.
“Splitters” that are used to connect a single antenna to multiple digital-to-analog converter boxes or digital televisions reduce the amount of signal available to each device. If you are having problems, check whether reception is improved without the splitter. In some cases an “active” splitter that includes an amplifier can solve the problem.
If you are near a station’s broadcast tower, reception of that station, as well as other stations, can be impeded by strong signal “overload.” Consider using an “attenuator” or removing amplifiers to improve your reception.
If you decide to replace or upgrade your indoor or outdoor antenna, many types are available from electronics retail stores at a variety of prices. Websites such as www.antennaweb.org provide information on the locations of broadcast towers and the types of outdoor antennas appropriate for the stations you wish to receive. If you need assistance with upgrading your antenna system, check with a local antenna retailer or antenna installer.
Ok first I can save you some money. Take your "HDTV" antenna back. There is nothing different about the antennas needed receive analog and digital signals. If you got reception without your converter box, use the same antenna with your converter box.
Next let's see if there is a problem with the box. Hook up a television with the antenna. How many stations do you get? Now hook up the same television & antenna, but this time put the converter box between the antenna & the TV. Do not turn on the box. Now how many stations do you get? If the number is different, the box is not allowing the antenna signal to pass through. That is bad. You want your signal to pass through the box so you can still pick up stations that don't broadcast digitally. Some areas of the country will not be covered by digital stations from all major broadcasters when the changeover happens in Feb.
My suspicion is either you did not have the antenna hooked up to the converter box when you searched for channels OR you are in an area that is not yet broadcasting digitally.
I hope this helps you solve your problem. Thank you for using FixYa and feel free to add more questions here by using comments.
When you say you "lose" channels, you probably mean there's no signal there anymore but they are still in the channel memory. This is normal if you have a rotatable antenna. You need to mark the rotator (or just keep a chart nearby) with the heading for each channel.
If you mean you're losing channels from memory when rescanning after turning the antenna, the only solution I can offer is to record the channels found (and their signal levels) after scanning a direction. Then change directions and rescan. See what new channels have been found, what have been lost, or how signal level has changed on common channels. Then you can manually add whatever you need, and you'll know what direction is best for each. It's tedious, but you should only need to do it once.
Buy a hdtv antenna to autoscan program channels which should bring in a lot more then reconnect with the older antenna afterwards and if you're still not getting all the channels then each source needs a strong hdtv antenna that can be adjusted manually.