Certain guiding lines to improve quality of reception To receive signals HD by satellite or cable could be the best choice in so far as the quality of l' image is in question, but it ya d' thousands; possible individual situations where REMOVED (Over The Air) would be the only option. In this case, you will have REMOVED an antenna to receive signals RF in coming format HD d' a ground station and are transmitted through l' atmosphere. If that s' to you it applies ya some crudes guiding lines which will help to benefit the best from your REMOVED set up. But will know that each situation has its own problems. Parameters which work magnificiently in Chicago, Illinois could not function of the whole with Phoenix, in Arizona, not to speak about Quicksand, Kentucky. Therefore, if you adhered to all the suggestions hereafter and cannot still receive signals HD REMOVED or only bad quality to ask for l' in a local television channel store helps or call your local television broadcast station.
The first and most important: you need d' an antenna and if you are serious whole on the quality of l' image you need d' an external antenna! With less qu' there is a situation which absolutely returns to install an external antenna impossible not to be satisfied d' an interior antenna. And if you live more than 70 miles of l' transmitter nearest an external antenna is your only chance to receive a signal with all. Contrary to the waves in the visible one of the spectrum of the radio waves to make penetrate the obstacles, but it ya a considerable loss of signal. The signal most clearly comes to your antenna best your reception. The same principle s' applies when it s' acts the height in which you place your antenna. If you wish to carry out a test you that your d' quality; improved image when you place your antenna higher. The reason is that the wave must pass by less and less the obstacles travellers coming from l' transmitter with your antenna. Low levels, it could be blocked by houses, trees, standard lamps etc Following its placement of l' antenna size is d' an major importance. More best. Antennas made up of several elements dipole. The distance between the two poles in an element must ideally be 1/2 the length d' wave of the signals. Chanel 2 by ex transmits over a length d' wave of 6 m which require an intervention of your antenna to measure at least 3 m in diameter. TV antennas dipole contain several elements with more or less long covering all the range lengths d' wave diffused. Signals secondary can pose a serious problem with a perfect reception of your signal HD. Those come by the wave which is reflected by objects near l' antenna. These reflexions to arrive at l' antenna with a shift of phase compared to the directly received signal what can cause interferences with serious distortions of your image TV.
If the secondary signals are a problem in your area, you could need d' a directional antenna which makes it possible to receive signals that d' only one direction, and is protected from the signals in source d' other directions. L' antenna does not have in direction of the next transmitter. If various channels of diffusion of various transmitters your antenna must be equipped d' an engine to turn in another direction if you change chain. If you have beautiful a large antenna and its position the roof or a balcony is relatively free, but have a weak signal, you can use an amplifier. But you ensure really need. If you receive already a strong signal and it always passed by an amplifier of your image TV could become distorted. If you live close d' a station of l' transmitter is most probably an amplifier not necessary. There exist different technical specifications for an amplifier which could cause confusion. Most important is the factor d' amplification in dB. It should be noted that the database them figures indicate a logarithmic scale. 10 dB, the signal are of 10 X, 20 dB, X 100,30 dB, 1000 X etc amplification of high-quality in the open air antennas must have values dB 15 - 20 or even more. It ya then the noise level. That should be a low number. If l' various amplifiers marks are compared, that which has the lowest noise level is of better quality. The distortion figure indicates how much the character signal is modified by the process d' amplification. Less there is better, of course. More advanced (and expensive) of the amplifiers to even compensate for the technique made qu' a signal moreover high frequency loses more its force while passing by a coaxial cable that l' one of the weakest frequency.
This east effect is compensated by an increase of more than more high frequencies. If it n' ya absolutely no manner how you could mount an external antenna you will have to return on an interior antenna. In this case, l' test is the best means of arriving to an optimal reception. It s' will in particular act to test different REMOVED antenna marks (to put d' agreement with your retail store which you can take several antennas d' origin to be tested. Then to buy the model which provides the best photograph and return the others) and the various positions in the house. A possibility of placing it in the attic which will increase your chances d' a good reception, even if it would require more the cables of connection to your room of television. Also to test various positions within the room. Put some share far from television, of the computers or d' other numerical processors from what it could come to l' interference of the distortions.
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