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InfoTeleves 43 (August 2017)

Fecha: 
08/2017

Logotipo InfoTeleves

Attachment Size
INFO_August2017_EN.pdf 5,00 MB

 

  Summary:

  • General information: DTT is here to stay +
  • Televes in the world: InfoComm & Fiber Connect (Orlando, Florida, USA) +
  • Your pictures: Despite Brexit +
  • FAQs: Can new satellites be added  to the H30FLEX channel plan? +
  • Always up-to-date: H30FLEX: 1.22 update +
  • Training: How to correctly fuse a fibre +
  • Ideas: Optical LNB and DTT in a single fibre +
  • Televes facilities: TVi, Televisão Independente headquarters (Lisbon, Portugal) +
  • Did you know...: Televes has been manufacturing aluminium tubes for antennas ever since 1965? +
  • Technological trens: DVB evolution for the broadcasting of advanced services +
  • New product: NevoSwitch dCSS with DCFLEX +


DTT is here to stay

All the uncertainties that existed only a year ago regarding the future of Digital Terrestrial Television (DTT) have already been resolved. Following the success of the World Radiocommunication Conference 2015 (WRC-15), the Official Journal of the European Union recently published the decision of the European Parliament to exclusively assign the 700 MHz sub-band (470–694 MHz) to the DTT at least until 2030, which confirms that DTT is here to stay. This decision ensures the development of DTT in the medium term, including the liberalisation of the second digital dividend.

Last June, Broadcast Networks Europe -­the entity that ensures a suitable regulatory environment for broadcasted radio and television- published some data showing the good health and the extraordinary social and economic value of DTT.

In a decade, DTT coverage has increased from 5% to 45% to become the leading platform for television distribution inside the EU

First, it highlights the significant increase in DTT penetration for the last decade, which made DTT become the leader platform for television distribution, with an increase from 5% to 45% in the period 2005 to 2015. It serves 100 million homes in the European Union, and 250 million people (80% of the population) enjoy a total amount of 2,000 channels.

Broadcast Networks Europe highlights DTT as the “backbone” of the EU audio-visual model. Since this technology ensures universal and free access to information, culture and entertainment, it contributes to the preservation of such values as public service, pluralism and inclusion. Moreover, it does represent a significant contribution to growth and quality employment
              

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Televes en el mundo 

Televes presence in sectoral fairs focuses on the US market events oriented towards multiservice solutions for optical fibre networks. At InfoComm, Steve Strong, Chief Operating Officer of the American subsidiary, revealed the details of the new IP68-certified ONT and DPU for G.fast environments, the perfect complement for network terminal equipment only accessible via coaxial cable or twisted pair.

The growth of the Televes brand in the United States is driven by the FibreData and CoaxData solutions for the integration of high-capacity television and data services on a network infrastructure that will be ready to implement future value-added services.

The brand's industrial innovation capacity was introduced with TForce, a Televes technology that uses MMIC component-based manufacturing techniques to build integrated circuits with exclusive functionality.

For more information, visit : en.televes.com/tforce

INFOCOMM

(Orlando, Florida) June, 14th-16th


  

Televes presented the new products in the IP and HDI-SDI encoder range, as well as the Multi-screen Transcoder.

 

Fiber Connect 

(Orlando, Florida) June, 12th-14th


  

Televes presented the new GPON and optical fibre solutions

 

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FAQs - Preguntas frecuentes

Can new satellites be added to the H30FLEX channel plan?


The H30FLEX web-based configuration eases personalisation and use.

The expert says

After connecting the meter to the PC and installing the appropriate driver, you need to access  http://h30.flex in the address bar of your internet browser. This will open the configuration web application.

H30FLEX allows the editing of the channel plans (terrestrial and satellite), the creation of new plans or the duplication of an existing plan. It also allows you to add new satellites to the channel list. To do so, you need to follow the steps below:

 

Plans / Customizable / Add Plan

  •     Edit the following fields:

Name:      xxxx
Type (Terr./Sat.):      Satellite
Band (Ku, C, S):      Ku.         ...Continue...

 

 

  •     Add Channel:

Channel:      54 (Tp. Transponder)
Polarity:      H/V
Frequency:      10.800 MHz
Bandwidth:      Symbol Rate x 1.35  ...Save...

 

This will allow you to save any satellite into the original factory-set list, which will facilitate the pointing process for new satellites 

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Ultima hora

H30FLEX: 1.22 update


Besides the new web development, the following upgrades are worth highlighting:
–    S Band
–    Quality profiles editing
–    Antenna pointing with selection criteria for the beep sound (level or C/N based)
–    Constellations
–    Pre-amplifier and LNB powering
–    SCR
–    Addition of the Czech language
–    Checkmarks

This update is available in the download section of the Televes website or in  en.televes.com/soft-h30flex

 

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YOUR PICTURES

 

 

 

Despite Brexit

According to the author of this image, in a British school party, the participants recreated the roofs of modern towns. The students built their own versions of the antennas inspired on Televes models. Still more evidence that Televes antennas are present on roofs all over the world, even on imaginary ones! 

 

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Formacion 

How to correctly fuse a fibre

All the tips for a perfect fusion


We all know that in order to guarantee the fusion procedure and quality (regardless of the type of fibre used), both the fusion splicer quality and the operator's knowledge about the process are essential in achieving an excellent job. Therefore, considering that fusion splicers have substantially improved their features over time to avoid any fibre-based problems, we wish to summarize here the appropriate steps to achieve a good fusion:
 

1. Fibre preparation (Stripping)
The protective cover is placed through one of the fibres and 3-4 cm protection material is stripped off with the help of a stripping tool (fibre stripper). Then, depending on the fibre type, we shall proceed as follows:

1a.    For 250-micron fibre:
A single stripping process is carried out, which will reduce thickness to the 125 μ of the cladding.

1b.    For 250 μ fibre covered in gel:
Gel should be completely removed before proceeding with the stripping. First, a paper tissue shall be used to remove most of the gel; then specific isopropyl alcohol wipes will be used to complete the cleaning.

1c.    For 250+900 μ (900 μ) fibre:
Two stripping processes are carried out, the first reducing thickness to 250 μ, the second to 125 μ. It is not recommended to remove both protections at the same time, since there is a high risk of fibre damage.

 

2. Cleaning procedure
Once the stripping is finished, the exposed section of the fibre is pressed (cladding) until it reaches 90º; this is how possible damage caused by the preceding procedure is detected (if the fibre was damaged, it will break when submitted to pressure).

Once this test done, the fibre is cleaned using a cleaning wipe dampened with isopropyl alcohol, always following the direction of the fibre head (it is recommended to always use items in the Televes range).

 

3. Cutting procedure
The cleaver has different positions based on the fibre dimensions (250 μ, 900 μ, and fibres with thicker protection, up to 3mm thick).

When working with fibres covered in gel (due to an incomplete cleaning procedure), the cutting blade should be cleaned to avoid the fibre slipping on the blade.

The key aspects of the cutting procedure are:

3a.    Achieve the smallest possible cutting angle on the fibre. The ideal angle is achieved when the fibre head forms a 90º angle with the fibre itself. Televes fusion splicers accept deviations below 3º.

3b.    Set a cut-off length appropriate for the specific fusion splicer. For ref. 232103 that length is 16mm.

 Picture no. 1: Set a cut-off length appropriate for the specific fusion splicer. For ref. 232103 that length is 16mm.

 

4. Fusion splicer adjustment procedure
Before proceeding with the fusion, we must tell the fusion splicer the type of fibre that we are going to use (SM/MM/DS/NZDS or BIF). Ref. 232103 has an “AUTO” mode to make the selection.

We also need to specify the length of the protective cover to be applied, for the oven to be configured accordingly..

 

 Arc Fusion Splicer (Ref. 232103)

 

5. Splicing process
The prepared and clean fibres are placed on the appropriate V-Grooves and the fasteners are closed to block them in the right position. The fibre head must be driven halfway between the V-Groove and the electrodes.

The next step will be automatically carried out upon closing of the fusion splicer's protective cover. The LCD screen will display how the equipment performs the perfect alignment of both fibres prior to the actual fusion. It is worth highlighting that only a three-axis (X, Y, Z) alignment technology ensures the best fusion results (0.00 or 0.01dB). Ref. 232103 is equipped with 6 efficient stepping engines to ensure this procedure is performed correctly.

 Picture no. 2: The prepared and clean fibres are placed on the appropriate V-Grooves and the fasteners are closed to block them in the right position.

 

The equipment (ref. 232103) also includes two key functions:

- Low-intensity "pre-discharge" procedure:
Used to clean the fibres and remove any impurities that may remain after the operator performed the manual fibre cleaning procedure.

- Traction test:
Detects the “cold” or failed fusions by applying a 2N traction force between both fibres.

6. Protective cover adjustment procedure
After placing the protective cover over the unprotected area between both fibres, the fused fibres are brought to the oven.

Once the baking procedure is over (protective cover fully contracted), both protective cover and fibres are brought to the cooling vent, final step of the procedure

See the video at: en.televes.com/fusion-splicer 

 

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Ideas

Optical LNB and DTT in a single fibre


We are sometimes faced with the need to create a fibre network with the signal coming from an optical LNB mixed with the terrestrial signal. If the generation of an optical television signal requires an optimal C/N (usual requirement for applications handling analogue channels or with a high load of DTT content), the optical transmitter must ensure a perfect conversion.

Televes provides a system consisting of an optical transmitter in 1550nm, equipped with WDM for the mixing of the optical LNB signal in 1310nm (Ref. 237301).

Another device splits the signal and recovers the terrestrial signal on reception (Ref. 237311).

Installation is straightforward, since neither device requires adjustment

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Instalacion 

TVi, Televisão Independente headquarters (Lisbon, Portugal)


 

TVi Televisão Independente S.A. is a television operator that holds several channels in Portugal, such as TVi24, TVi Internacional, TVi África, TVi Direct, TVi Eventos, TVi Reality, TVi Ficção, +TVi and TVi itself.

Both original analogue headends in the headquarters were replaced by two new digital modules. The new racks were equipped with encoders for the respective signal sources to be integrated with the TVi contents. The T.0X encoders produce 24 SD-modulated internal programmes, and two HD programmes with an outstanding signal quality

INSTALLER:

Serviços Técnicos da


 

 

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Sabía que ... ...Televes has been manufacturing aluminium tubes for antennas ever since 1965?

The decision to import the first radio-frequency tube forming and welding machine may have been one of the very first visionary strategic decisions taken back in that year. It took over one year for the machine to be adapted to our stringent production environment, which forced us to devise an ingenious continuous supply circuit to avoid interruptions when changing materials in the production line.

Over the decades, other technologies have emerged for the manufacturing of aluminium tubes, but the upgrades performed by Televes engineers on the original radio-frequency machine still provides us with the best control and flexibility in the manufacturing of antenna tubes, since they are produced in a range of diameters both for cylindrical and square shapes.

The radio-frequency tube welding machine is still operating at full capacity, concealing the very essence of Televes. A technological vision from the early sixties that produced an always-innovative process through our industrial know-how that kept enhancing the original technique and art of the process 

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DVB evolution for the broadcasting of advanced services

DVB has revolutionised content broadcasting over the last twenty years, allowing the distribution of value-added services such as UHD.

 

In 1991, broadcasters and equipment manufacturers combined efforts to provide a European Digital Terrestrial Television platform. The European Launching Group (ELG) was created, which expansion to other public and private groups laid the ground for the DVB project.

For legal and technological complexity reasons, the first digital services were broadcasted through satellite and cable: the so-called DVB-S and DVB-C, which standards were published in 1994. Service deployment to the final user was possible thanks to the MPEG2 audio/video compression algorithm, which allowed the use of manageable bit rates (15 Mbps at the very beginning!) with a good quality of compressed video. It was only in 1997 that DVB-T, the standard for digital terrestrial television, was published, thus completing the current set of standards.

These standards allowed the deployment of broadcasting services beyond Europe. Nowadays all the countries in the world —except for the US, China, Japan and Brazil— use some DVB broadcasting standard.

The standards had to evolve to a second generation when the need for a better usage of the broadcasting spectrum arose. DVB-S2, DVB-C2 and DVB-T2 gradually appeared, which brought the channel capacity close to the so-called “Shannon limit” (which establishes the maximum channel capacity for a given bandwidth and signal-to-noise ratio). This means there will not be a third generation of broadcasting standards. However, DVB-S2 has evolved to DVB-S2X, which substantially improves capacity for both very high and very low signal-to-noise ratios.

Some of the DVB-S2 modes, especially DVB-S2X, are used for satellite data distribution, while DVB-C2 is used for data distribution over cable and optical fibre networks. Finally, DVB-T2, which has already been widely deployed in Europe and Asia, has allowed UHD diffusion.

DVB has revolutionised content broadcasting over the last two decades. This short summary of its evolution left multiple topics out: content treatment and delivery, Conditional Access, IPTV, new MPEG4 and HEVC coding standards, 3DTV, LTE, Virtual Reality, and many others. They will be addressed in next issues

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