Sugerente titled to attract the attention. Only we were trying to turn the look away and treat here some questions that have been considered made from 2003. It turns out that in the above mentioned date a new law was turning an electrician straight into a fitter authorized for the TDT. The professional who now wants to begin with this, for mounting an antenna for the TDT, must be like a minimal Technical Engineer. But, then that happens with those who have not realized any course on the TDT.

This new technology is more complex enough than the current analogical television. Earlier it was enough that dizziness was not had to rise to the roof. There was measuring itself the sign that was entering Antenna xdBuV and the C/N was looking out of the corner of the eye. Now it is necessary to know everything on modulation COFDM, QAM, FEC or even the Interval of Watch. So that the measurements are based on the CBER and later the postviterbi VBER as well as MER.



Frequently it is necessary to sacrifice a few profit dB for the quality of the sign up to coming to (0 absolutely or at least over QEF, free of errors. Some meters of enclosed field show you the constellation straight and you can have an indicator that he assures to you if the sign is correct or not.

Also it is necessary to know all the interferences that affect the TDT. And how to be able to mix antennas of different issuing centers or of that way, the head has to fit and to distribute the sign so that the levels keep on being correct in the capture of the user. And like nó, it is necessary to know enough of electronics to know that recipients will "behave" well in according to that type of facilities, since not all the recipients have an equal sensibility in the Tuner or a reviser postviterbi suitably.

Also it is essential to know the effect Fading, the impulsive noise, electromagnetic interferences, harmonic or white noise between others.

Many complaints exist on the centers of emission of the TDT and partly some of them have technical problems that must be solved to today. But also it is true, that the majority of the problems appears in the proper receiving installation, that is to say, of the hearth.

This way, a fitter authorized with his card can give in the nail or nó. This cannot be a widespread interpretation, because there are fitters really expert in the piece of news técnologias and the sin does not belong to all. Many other problems are contributed by the proper user who does not know that next to the decoder it is not possible to leave a burning mobile phone or a very nearby microwave or that the famous junctions inside the fond house exceedingly a good installation.

In any case all this is a remark that many must bear in mind and according to account Abertis, we need more fitters to expire with the dates of the analogical blackout. Now It Impels TDT does echo of the same to him, but I repeat, the TDT must be studied in depth as well as the materials that we are going to use, we must know them in depth with a rather high technical base...


(Article of Claudio Hernández - http://www.tdt-aguilas.com, 30-01-09)