{"id":15768,"date":"2024-08-12T12:10:27","date_gmt":"2024-08-12T12:10:27","guid":{"rendered":"https:\/\/antoniruiz.com\/?p=15768"},"modified":"2024-08-29T08:24:10","modified_gmt":"2024-08-29T08:24:10","slug":"tot-sobre-el-cable-coaxial-per-a-televisio-i-cctv-una-guia-completa","status":"publish","type":"post","link":"https:\/\/antoniruiz.com\/ca\/tot-sobre-el-cable-coaxial-per-a-televisio-i-cctv-una-guia-completa\/","title":{"rendered":"Tot sobre el Cable Coaxial per a Televisi\u00f3 i CCTV: Una Guia Completa"},"content":{"rendered":"\n<p>Top&nbsp;Cable ofereix una \u00e0mplia varietat de cables coaxials per a assegurar la millor captaci\u00f3 i distribuci\u00f3 de senyals de televisi\u00f3 i CCTV.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">QU\u00c8 \u00c9S UN CABLE COAXIAL?<\/h3>\n\n\n\n<p>Un cable coaxial consta d&#8217;un nucli de fil de coure envoltat per un a\u00efllament, una pantalla de trena de coure i una coberta protectora. El nucli transporta senyals electr\u00f2nics que constitueixen la informaci\u00f3, envoltant al nucli existeix una capa a\u00efllant diel\u00e8ctrica que la separa de la pantalla. La pantalla de coure trenat actua com a massa i protegeix el nucli del soroll el\u00e8ctric. El nucli i la malla han d&#8217;estar separats un de l&#8217;altre. Aix\u00f2 \u00e9s molt important perqu\u00e8 en el cas que arribessin a tocar-se es produiria un curtcircuit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">QU\u00c8 SIGNIFICA LA CATEGORIA&nbsp;VATC&nbsp;EN UN CABLE COAXIAL?<\/h3>\n\n\n\n<p><br>El significat de les sigles&nbsp;VATC&nbsp;\u00e9s Valor d&#8217;Atenuaci\u00f3 del Cable. L&#8217;atenuaci\u00f3 \u00e9s una&nbsp;<strong>disminuci\u00f3 de la pot\u00e8ncia de transmissi\u00f3 de senyal que ofereix el cable entre una font de connexi\u00f3 i el dest\u00ed d&#8217;aquest<\/strong>. La mesura amb la qual es mesura s\u00f3n els decibels i influeix directament en el corrent, el voltatge i la pot\u00e8ncia del senyal. Com m\u00e9s gran sigui l&#8217;atenuaci\u00f3 el senyal transm\u00e8s perd m\u00e9s qualitat.<\/p>\n\n\n\n<p>Els cables coaxials de televisi\u00f3 poden tenir un&nbsp;VATC&nbsp;de categoria 17, 19 o 21. Aix\u00f2 significa que, per cada 100 metres de longitud del cable, es perden 17, 19 o 21 decibels de senyal. Si el cable compta amb un major apantallament, el valor d&#8217;atenuaci\u00f3 del cable ser\u00e0 menor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">QUINES ESPECIFICACIONS HAIG DE CONSIDERAR En SELECCIONAR UN CABLE COAXIAL PER A TELEVISI\u00d3?<\/h3>\n\n\n\n<p>Si el que vols \u00e9s connectar el teu televisor amb algun reproductor com un ordinador, una videoconsola,&nbsp; un aparell de TDT, un circuit tancat de TV (CCTV) o qualsevol altre, necessitar\u00e0s un cable adequat per a cada cas. En&nbsp;Top&nbsp;Cable fabriquem cable coaxial de televisi\u00f3 per a \u00fas industrial i tamb\u00e9 dom\u00e8stic.<\/p>\n\n\n\n<p>A l&#8217;hora de triar quin cable \u00e9s el m\u00e9s adequat per a realitzar una connexi\u00f3 amb la televisi\u00f3 cal tenir en compte la longitud, l&#8217;\u00fas que se li donar\u00e0 i l&#8217;apantallament del cable. La pantalla genera un senyal net de sorolls, preservant el cable de les freq\u00fc\u00e8ncies i ones indesitjables que es transmeten per l&#8217;aire, generant un senyal de la m\u00e0xima qualitat. Existeixen diferents tipus de pantalles, en funci\u00f3 de les necessitats de la instal\u00b7laci\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pantalla simple<\/strong>. Els cables coaxials de pantalla simple estan recomanats per a connectar l&#8217;antena a l&#8217;aparell de TDT o a la televisi\u00f3.<\/li>\n\n\n\n<li><strong>Doble pantalla.<\/strong> Permet un millor apantallament del senyal i es recomanen per a connectar l&#8217;antena a televisions HD. Els cables coaxials fabricats per&nbsp;Top&nbsp;Cable tenen doble apantallament.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">QU\u00c8 SIGNIFIQUEN LES SIGLES&nbsp;RG&nbsp;EN UN CABLE COAXIAL?<\/h3>\n\n\n\n<p>Les sigles \u201cRG\u201d&nbsp;es poden interpretar com a \u201c R\u00e0dio de Grau\u201d, o \u201cGuia de R\u00e0dio\u201d. \u00c9s un terme que es remunta a l&#8217;\u00e8poca de la Segona Guerra Mundial, quan l&#8217;ex\u00e8rcit va fer un gran \u00fas de cable coaxial i va desenvolupar un conjunt de normes per a especificar els diferents graus de cable coaxial i les seves aplicacions. Actualment es continua usant aquesta denominaci\u00f3, per\u00f2 normativament els cables es regeixen per la MIL-C-17.<\/p>\n\n\n\n<p>Com hem destacat abans, els cables coaxials poden tenir una aplicaci\u00f3 dom\u00e8stica i tamb\u00e9 industrial, adaptant-se a cada tipus d&#8217;instal\u00b7laci\u00f3. Existeix una gran varietat de cables coaxials, entre els quals destaquen el cable coaxial RG11 (M17\/6), el RG6 (M17\/2) i el RG59 (M 17\/29).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><br>QUINES S\u00d3N LES DIFER\u00c8NCIES T\u00c8CNIQUES ENTRE EL CABLE&nbsp;RG-11,&nbsp;RG-6&nbsp;I&nbsp;RG-59?<\/h3>\n\n\n\n<p>Els cables coaxials com el&nbsp;RG-11&nbsp;tenen una menor atenuaci\u00f3 del senyal en comparaci\u00f3 amb cables coaxials de menor calibre, com el&nbsp;RG-6&nbsp;o el&nbsp;RG-59. Aquesta menor atenuaci\u00f3 li dona la capacitat de transmetre senyal a major dist\u00e0ncia sense que la qualitat d&#8217;aquesta es vegi afectada.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><br>COM AFECTEN ELS MATERIALS DEL CONDUCTOR I L&#8217;A\u00cfLLAMENT A LA QUALITAT DEL CABLE COAXIAL?<\/h3>\n\n\n\n<p>La qualitat i el manteniment del cable coaxial t\u00e9 un impacte important en la qualitat de la transmissi\u00f3 del senyal. A continuaci\u00f3 destaquem algunes de les maneres de comprovar la qualitat dels cables coaxials.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Observar la integritat de l&#8217;a\u00efllament.<\/li>\n\n\n\n<li>Mesurar la consist\u00e8ncia de l&#8217;a\u00efllament del cable coaxial.<\/li>\n\n\n\n<li>Verificar que el cable hagi estat fabricat per un prove\u00efdor de confian\u00e7a i que compleixi amb les normes i certificacions de qualitat internacionals.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">COM ES REALITZA EL MANTENIMENT PREVENTIU DELS CABLES COAXIALS INSTAL\u00b7LATS?<\/h3>\n\n\n\n<p>Com en qualsevol tipus d&#8217;instal\u00b7laci\u00f3 el\u00e8ctrica, per a minimitzar els riscos d&#8217;accidents, \u00e9s recomanable&nbsp;<a href=\"https:\/\/www.topcable.com\/blog-electric-cable\/el-mitma-apoya-la-campana-para-actualizar-la-instalacion-electrica-de-las-viviendas\/\" target=\"_blank\" rel=\"noreferrer noopener\">realitzar inspeccions peri\u00f2diques<\/a>&nbsp;dels cables coaxials. D&#8217;aquesta manera \u00e9s possible detectar qualsevol signe de mal, desgast o deterioraci\u00f3 que pugui afectar l&#8217;\u00f2ptim funcionament del cable. Aix\u00ed, es garanteix la longevitat i fiabilitat de la instal\u00b7laci\u00f3 el\u00e8ctrica.<\/p>\n\n\n\n<p>Les inspeccions peri\u00f2diques poden evitar reparacions o substitucions costoses. Alguns senyals que haurien de cridar-nos l&#8217;atenci\u00f3 s\u00f3n danys f\u00edsics, com a corts o abrasions, aix\u00ed com signes de degradaci\u00f3 de l&#8217;a\u00efllament, pantalla o coberta, com a esquerdes o descoloraci\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">COM TRIAR UN PROVE\u00cfDOR DE CABLE COAXIAL DE CONFIAN\u00c7A?<\/h3>\n\n\n\n<p><br>Per a triar un prove\u00efdor de cable coaxial de confian\u00e7a, \u00e9s important acudir a un distribu\u00efdor de material el\u00e8ctric que ofereixi plenes garanties. Assegura&#8217;t que el teu prove\u00efdor adquireix cables coaxials a fabricants que compten amb els certificats de qualitat&nbsp;<a href=\"https:\/\/es.wikipedia.org\/wiki\/RoHS\" target=\"_blank\" rel=\"noreferrer noopener\">RoHS<\/a>,&nbsp;<a href=\"https:\/\/europa.eu\/youreurope\/business\/product-requirements\/labels-markings\/ce-marking\/index_es.htm\" target=\"_blank\" rel=\"noreferrer noopener\">CE<\/a>,&nbsp;<a href=\"https:\/\/www.topcable.com\/blog-electric-cable\/resumen-de-la-clasificacion-cpr-clases-b2-c-d-y-e\/\" target=\"_blank\" rel=\"noreferrer noopener\">CPR<\/a>&nbsp;i&nbsp;<a href=\"https:\/\/www.aenor.com\/certificacion\" target=\"_blank\" rel=\"noreferrer noopener\">AENOR<\/a>, com&nbsp;Top&nbsp;Cable.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/antoniruiz.com\/wp-content\/uploads\/2024\/08\/Twitter-1024x576-2.png\" alt=\"\" class=\"wp-image-17189\" srcset=\"https:\/\/antoniruiz.com\/wp-content\/uploads\/2024\/08\/Twitter-1024x576-2.png 1024w, https:\/\/antoniruiz.com\/wp-content\/uploads\/2024\/08\/Twitter-1024x576-2-300x169.png 300w, https:\/\/antoniruiz.com\/wp-content\/uploads\/2024\/08\/Twitter-1024x576-2-768x432.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Top&nbsp;Cable ofereix una \u00e0mplia varietat de cables coaxials per a assegurar la millor captaci\u00f3 i distribuci\u00f3 de senyals de televisi\u00f3 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[33],"tags":[],"class_list":["post-15768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-ca"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - 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