Jun 18, 2008
Belden has the right products for HDTV
Posted by : ueblyn
Cable With Connector Exceeding the standard: Belden has the right products for HDTV Tuesday, Apr 22, 2008 While an estimated 95% of all broadcast facilities still have toadopt the HDTV format, Belden already has the products and theexperience to help companies make the switch. At a recent PressBriefing, Werner Eich, Marketing Manager Entertainment for BeldenEMEA, provided an overview of Belden’s range of products forBroadcast, sports and residential use. “We are experiencing a digital revolution: broadcasters,television production studios and post-production enterprises areadopting high definition, serial digital imaging (HD/SDI) as theirformat of choice because of its superior performance and otheradvantages. Precision digital video is processed in real time andis extremely stable, which reduces equipment adjustments and allowscopies or reproductions to retain the same quality as the original.Moreover, signal degradation is virtually eliminated and noiseimmunity is greatly improved. Digital technology not only promisesto improve picture and sound quality, but also paves the way forinteractive on-demand TV and other digital services. “In the 1080i (interlaced) format, the image resolution is1920x1080 pixels, sent at 60 interlaced frames per second. In the1080p (progressive) format, the image resolution is the same but issent at 60 complete frames per second. Thus, in the progressive format, the complete image updates every1/60th of a second and in the interlaced format, only half of theimage updates every 1/60th of a second. As a result, progressiveimages result in better image definition and quality.” “Cable manufacturing consistency and quality are both key toachieve minimal return loss. Good practice requires testing to thethird harmonic of the operating frequency. For serial, single cable1080p, that means testing to a frequency of 4.5 GHz. This 1080pformat is expected to transmit serial digital video signals at 2.97Gb/s, requiring an operating frequency of 1.485 GHz. Thistranslates to a shorter wavelength and a greater chance thatinconsistently manufactured cables will choke off the signal with ahigh level of return loss. This may be caused by even the slightestirregularity in the cable manufacturing process. A slightly bentshaft, bad bearing or uneven cable tension, for example, can causereflection and affect the signal wavelength. Therefore, utmostconsistency and control in the manufacturing process is essentialto the reliability of the cable’s signal transmission at highfrequencies and to minimize return loss. Increased sweep testing “Therefore, broadcast camera and video cables need to delivertop performance, whilst at the same time meeting extendedinternational and European standards. It is for this reason that Belden became the first cablemanufacturer to increase its sweep testing from 3 GHz to 4.5 GHzfor all coaxes designed for maximum bandwidth, minimum return lossand minimum attenuation loss. These cables already meet the verytight specifications for electrical properties and are ideallysuited for both analog and digital video in broadcast,post-production and other critical video applications. In addition,Belden performs 100% sweep testing to 4.5 GHz on every reel of HDcable and provides certification to assure unequalled levels ofcable signal integrity and reliability, with lower return loss (RL)at higher frequencies. “We are prepared for the future. As a pioneer and leader incable technology, Belden has always taken a stringent approach tocable quality assurance. Rather than simply inspect and test randombatches of cables after manufacturing, Belden begins its qualityprocess in the product development and manufacturing stages. “When an independent test laboratory took an in-depth look atthe HD performance of the video coaxes used in TV studios, cableswere tested for return loss, attenuation and maximum cable run onHD (1080i and 720p). In the end results all Belden productsdelivered performance values that exceeded those listed in Belden'sown catalogues.” “Belden continually introduces new developments and productsfor a range of different applications for the creation, managementand delivery of entertainment content, including Mobile TV, IPTVand D-Cinema. New products recently introduced include: Digital and analog audio/video composite camera cable 1347A – This new composite design, using 1505A Precision Video cable and9451 Audio cable, provides exceptional video, audio and power forENG/EFP cameras standard setting cables. Outside broadcast Tactical fiber optical cable for Outside Broadcast – Rugged, resilient and lightweight, these cables aredesigned for fast and easy use in mobile communication systems,digital camera transmissions in electronic news gathering (ENG)vehicles, as well as mining and industrial applications, especiallyfor long haul HD transmissions. Halogen-free cable – A version of Brilliance? DigitTruck 179DT lightweight RG-179 Type 75-ohm coaxial cable. It is designed to lighten the load on thetruck, reduce the amount of space needed and to improveair-conditioning air flow and gas mileage. Wireless Access System – The unique design with channel blanket technology greatlysimplifies installation and offers improved performance overcurrent technology. Consisting of intelligent 8 and 24-port switches and dual and four-radio Access Points (APs),this enterprise-grade WLAN eliminates the need for deep RFenterprise while eliminating the trade-off between coverage,capacity and mobility. New Product Bulletin NP260. Expanded line of FRNC speaker cables – A new line designed for audio professionals who requireexceptionally clear and very precise sound for PA installations.All the single pair and speaker snake cables are halogen-free butstill flexible. The Brilliance? line of unshielded speaker cables consists of three products with1.5mm2, 2.5mm2 and 4.0mm2 constructions. Expanded line of FRNC OFHC premium construction speaker cables– All single pair and speaker snake cables are halogen-freebut still flexible, with low capacitance and made with oxygen-freecopper for exceptional sound clarity. Print legends facilitatelocation Identification (such as Room 12345, Zone ABCDE). Banana Peel Precision Video Snake Cables – This line now features three of Belden’s mostpopular SDI/HD coaxes to include a 1694A composite construction. Itgives outstanding video performance using multiple coaxes in asingle pull. Halogen-free VideoFlex? Snake Cable - A new line of halogen-free component video cables designed todeliver optimum performance while helping to reduce installationand labor costs. An extension of Belden’s highly popularVideoFlex? Snake Cable with an easy-to-install bundle of1855ENx, which has the very common European video coaxial dimensionof 0.6/2.8. CATV Multicore Cable for Multi Switch Systems - An extension of the highly popular CATV cables, with aneasy-to-install bundle of H121A, designed for optimum performancein multi-switch systems and to reduce installation time. This hasthe very common European video coaxial dimension of 0.8/3.5 andprovides optimum signal transmission performance for MATV/SMATV. CatSnake
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