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Info 15 (December 2012)
- General information: : HBBTV+
- Televes in the world: Televes present in the Fairs of Orlando and Ukraine +
- FAQ: Difference between an Active antenna and a BOSS-Tech antenna +
- Your pictures: Radiation protection+
- Talking about...: Cable Certification Center +
- Did you kow...: QSD satellite dishes have been awarded in Germany? +
- Training: Filtering systems: advantages and disadvantages +
- Ideas: Applications of a micro-cavity LTE filter +
- Real installations: Marina of Platja d’Aro +
- New product: The Choice is Clear +
TELEVES IN EEBC Televes has taken part in the 10th International Fair EEBC-2012 in Kiev, Ukraine, in the fairgrounds of “Kiev Expo Plaza”. It is the main commercial meeting of the sector in the country, with great implication of international firms. It is offered in combination with a great array of seminars and conferences where Televes had a chance to share gained experiences with its main distributor in Ukraine, Roks PJSC. |
that Televes DAT HD BOSS aerials and the QSD dishes distribute television signals throughout the fairgrounds, setting the bar for quality standards in the market TELEVES IN SCTE CABLE-TEC SCTE Cable-Tec Expo2012 has become the event of the year for the engineering in¬dustry in the United States. In this edition it was estimated that close to 10.000 visi¬tors attended, especially interested in pro¬duct releases and service launches related to telecoms technologies. The star of the show were the development of efficient networks. |
analysers, where the attention was centered in the new re¬lase ot the H60 with its larger screen with more resolution and contrast. Visitors were particularly impressed with the new version of Digital Processing that allows for measurements up to 3,3GHz, or remote control of signal readings, amongst other features. Also, Televes presented the relea¬se of the H30 handheld meter and all the Fiber Optic distrubution elements of the T.0X headend |
What is the difference between just an active antenna, and our advanced BOSS-Tech antenna? |
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EXPERT OPINION |
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signals LTE/4G Antenna with BOSS-Tech |
Radiation protection... In case anyone had doubts about the shielding of our antennas, this picture confirms that there is no safer antenna for the family that a Televes one
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Cable Certification Center |
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“The quality of the coaxial cable is the key element in the mitigation of the tech¬nical challenges that arise from the LTE” |
connectors, as they are the elements where upload mobile frequencies can introduce interference in the television network in the buliding. |
This parameter is one of the most influential in the quality of the shielding. Sergio Martín |
Filtering systems: advantages and disadvantages |
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Let us have a look to the advantages/disadvantages of the different technologies used to implement filters intended to reject interferent LTE signals. |
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Among the most used technologies we can mention: LC: Using discrete components (L, C) it can be achieved significant rejection to the interferent band, although at the expense of rather high insertion losses for DTT channels in the UHF band. Although these filters are, due to its price, one of the first choices, their higher insertion loss in the range of DTT signals would require a readjustment of the gain of the distribution to compensate these losses. Ceramic resonators. The ceramic resonator filters can solve, in part, the problems of insertion loss of the LC filter. However, the choice of quality resonators is crucial to avoid filter drifting with temperature, which can vary considerably both rejection and insertion loss in adjacent DTT channels (59, 60) with the LTE frequency band. SAW filters. The Surface Wave Filter (SAW) reaches very high rejections in small frequency ranges, but at the expense of very high insertion losses, which causes that it must be combined with additional electronics (amplification), which results in complexity in their implementation and therefore increasing manufacturing costs. |
Cavity filters. Filtros de cavidad consisten en elementos sintonizables que forman las líneas de transmisión acopladas alojados dentro de cavidades resonantes de metal. These filters achieve a very significant rejection characteristics (typically 25-30 dB or even higher), maintaining a minimum insertion loss (<1 dB in the DTT frequency band, and 2 dB typical loss for channels 59, 60), thanks the high Q (quality factor) of the tunable elements. |
What Televes has achieved with its cavity filter (Spanish patent and future European patent extension), is to implement this technology in a small volume (10 cm x 5 cm) and a weight less than 250 grams, which enables it to be used in both indoors and outdoors. Estos elementos resonantes están separados por una distancia igual a la longitud de onda de trabajo dividida por 4 y han sido diseñados aunando el alcance de las características de rechazo y pérdidas de inserción con su implementación industrial en grandes volúmenes.
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Applications of a micro-cavity LTE filter |
type of filter confines it’s magnetic fields in cavities that results in very little coupling losses as well as excellent values of rejection band. |
Coaxdata System in the marina of Platja d’Aro (Girona) |
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In an area of 33 luxury apartments in Platja d’Aro, it is wondered about what would be the best way to establish a data network.
The installation in each apartment consists of a CoaxData adapter (ref 7689) and a filter (ref 7654) for the isolation between TV and Data bands. |
Mathematical Precision and Exclusive Functionality |
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