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HDTV Antenna Alignment 

Over-The-Air (OTA), Broadcast, Aerial, Terrestrial, Roof, Attic  

In the good old days, antenna alignment was as easy as turning to a channel on the TV and then rotating the antenna until you had the best picture. But now, you have to scan for digital channels, and you have to be receiving them, to scan for them. Sadly, in terms of antenna alignment, the good old days are gone.

Antenna alignment is a little bit different in the days of digital signal.

So, how do you align an antenna?

There are two ways to align an OTA antenna when looking for the digital signal of today's TV's.

The first way is with a compass. The second way is with a digital signal meter. Since a compass is far less expensive and easier to come by, I will describe this method of determining the direction by azimuth. To find out where to point your antenna (pointing or alignment of your antenna makes all the difference in reception) you must first find out where you are (direction and distance) in relation to the local digital broadcasts.

Instructions and help using TVFool

Following are the directions for using AntennaWeb.

Step 1. Visit www.antennaweb.org to determine the antenna type to use and who is broadcasting in your area.

         Select "Digital Channels Only" to get the digital channel results.

         Print out the results.

   Notice that on the right side of the printout are compass readings. These are the direction to the source from your location. They are all at different locations and different directions. Use the compass azimuth readings on the page to find your pointing direction.

For example:

  When I check for the direction from my location near St. Louis, I get the information below. (This is an edited version for instructional purposes.)

The three columns on the right are:Compass azimuth (direction), miles from the transmitter, and the channel assignment, in that order.

Make note of the channel assignments at the far right. After pointing your antenna, you will want to have your receiver or TV to search for channels. If doing a manual search, those numbers are the channels that you are searching. (i.e. for CBS, VHF channel 4, the digital signal is actually arriving via UHF channel 56.) 

 KMOV-DT    4.1    CBS   ST. LOUIS MO               121°     30.0      56

 KDNL-DT    30.1    ABC   ST. LOUIS MO               117°     26.9      31

 KPLR-DT    11.1    CW    ST. LOUIS MO               118°     27.3      26

 KSDK-DT    5.1     NBC    ST. LOUIS MO              119°     27.2      35

 KTVI-DT     2.1      FOX   ST. LOUIS MO               125°     26.5      43

 KETC-DT    9.1     PBS   ST. LOUIS MO                133°     27.8      39

 KNLC-DT   24.1     FMN   ST. LOUIS MO               156°     30.1      14

 WRBU-DT  46.1     MNT   E. ST. LOUIS IL             149°     29.9      47

One way to determine where to point is to take the lowest azimuth number (117°) and the highest (156°) and determine the center point, approximately 137°. Use your compass to find 137°, and point your antenna in that direction. Depending on your antenna and the resulting signal, you may get some or all the above listed channels.

If you are having trouble with some channels, you might want to decide which channels you are most interested in and focus on those. For example, from the above list, I would prefer to have all but the last two if that would help with the others. In this case, I would no longer consider the 156° or the 149° readings.

So, I am finding the "center" between 117° and 133°. Now I'm looking for 125°, instead of 137° used previously. Pointing my antenna at 125°, I should increase my signal for the six channels I was most interested in, while possibly sacrificing the two that don't interest me.

After aligning the antenna, you then must go to your receiver or TV's user menu. You will find a menu option to automatically search for digital channels. You must do this before anything will come from your antenna. In some cases, you may be able to manually search individual channels to add them to your lineup if they weren't found on the auto search function.

NOTES:

    Please be aware that there are no absolutes in over-the-air reception of local digital broadcasts. There are "hot" spots of signal and areas of dead signal, sometimes even within the same attic space. So, first, don't give up and try other placement options, and second, it is possible that you just won't get some stations. 

    The digital modulation 8-VSB used in terrestrial broadcast systems can have a reception problem from TOO MUCH signal. In other words, if you are having a problem with your TV reception, pixilation or "loss of signal" message and you can't understand why, because you have very high signal strength, it is due to a processing problem in the tuner. Use an attenuator to reduce the signal a bit and this should remove the problem.  

    If you are having any trouble at all with reception, make sure you add a signal amplifier or signal amplifier/improver to boost signal and reduce noise.

    Some Dish Network 622's will not find any channels on an auto search. Manually searching each channel and then adding the channel will usually put these into your channel list.

    Use of a digital signal meter can assist the process greatly. Perfect Visionmakes a digital meter, the Digiair Off-Air VHF/UHF Spectrum Analyzer. This meter has settings that allow for pre-selection of up to 18 channels, that can be viewed  simultaneously, 6 channels per screen, on each of three screens. Using just one screen you can view your "top" 6 channels and point your antenna without question about best alignment. This meter cost about $200.00.

To rate this meter, I would give it 2 WOWS out of 5. This meter has a very poor design regarding the power button that gets turned on when the unit gets bumped or handled.  This increases the severity of the already poor battery life. In addition, the LCD screen is nearly impossible to read through the case.

When purchasing a meter, SMS viewing should be high on your priority list.

Using TVFool

You may find TV Fool to be a good option for assistance. While the site looks intimidating at first, it is very simple and helpful. Just click the start here button and input your address. The report that is generated has a circular map indicating the direction and distance from your home to the transmitters. This is particularly helpful if you don't have a compass. I suggest following this link for instructions and assistance: http://www.dtvusaforum.com/45628-post2.html

Hope this helps!

Highdef Jeff

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You have a right to an antenna!

The rule prohibits most restrictions that: (1) unreasonably delay or prevent installation, maintenance or use; (2) unreasonably increase the cost of installation, maintenance or use; or (3) preclude reception of an acceptable quality signal.

Q: Who do I call if my town, community association or landlord is enforcing an invalid restriction?
A: Call the Federal Communications Commission at (888) CALLFCC (888-225-5322), which is a toll-free number, or 202-418-7096, which is not toll-free. Some assistance may also be available from the direct broadcast satellite company, broadband radio service provider, television broadcast station, or fixed wireless company whose service is desired.

Over-the-Air Reception Devices Rule

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