{"id":35148,"date":"2019-10-31T22:02:35","date_gmt":"2019-10-31T19:02:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-8-opticheskaya-magistralnaya-set\/"},"modified":"2019-10-31T22:02:35","modified_gmt":"2019-10-31T19:02:35","slug":"seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-8-opticheskaya-magistralnaya-set","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-8-opticheskaya-magistralnaya-set","title":{"rendered":"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165\" src=\"\/wp-content\/uploads\/1c4d747d25a95ae994d82fbd59e116a0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPo mnoho let byla z\u00e1kladem datov\u00e9ho p\u0159enosu optick\u00e1 m\u00e9dia. Je t\u011b\u017ek\u00e9 si p\u0159edstavit u\u017eivatele Habr, kter\u00fd by tyto technologie neznal, nicm\u00e9n\u011b bez alespo\u0148 stru\u010dn\u00e9ho popisu se v m\u00e9 s\u00e9rii \u010dl\u00e1nk\u016f neobejdeme.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b class=\"spoiler_title\">Obsah s\u00e9rie \u010dl\u00e1nk\u016f<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449322\/\">\u010c\u00e1st 1: Obecn\u00e1 architektura s\u00edt\u011b KTV<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449902\/\">\u010c\u00e1st 2: Slo\u017een\u00ed a forma sign\u00e1lu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450256\/\">\u010c\u00e1st 3: Analogov\u00e1 slo\u017eka sign\u00e1lu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450258\/\">\u010c\u00e1st 4: Digit\u00e1ln\u00ed slo\u017eka sign\u00e1lu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450278\/\">\u010c\u00e1st 5: Koaxi\u00e1ln\u00ed distribu\u010dn\u00ed s\u00ed\u0165<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450452\/\">\u010c\u00e1st 6: RF sign\u00e1ln\u00ed zesilova\u010de<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/454542\/\">\u010c\u00e1st 7: Optick\u00e9 p\u0159ij\u00edma\u010de<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/455355\/\">\u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165<\/a><\/noindex><\/li>\n<li>\u010c\u00e1st 9: Hlavn\u00ed stanice<\/li>\n<li>\u010c\u00e1st 10: Diagnostika a \u0159e\u0161en\u00ed probl\u00e9m\u016f na KTV s\u00edti<\/li>\n<\/ul>\n<p>\nPro \u00faplnost obrazu jednodu\u0161e a na prstech vysv\u011btl\u00edm p\u00e1r z\u00e1kladn\u00edch v\u011bc\u00ed (nebu\u010fte p\u0159ehnan\u011b kriti\u010dt\u00ed, je to pro ty, kte\u0159\u00ed o tom v\u016fbec nic nev\u011bd\u00ed): optick\u00e9 vl\u00e1kno je sklo, kter\u00e9 bylo vyt\u00e1hnuto do nit\u011b ten\u010d\u00ed ne\u017e vlasy. Po n\u011bm se \u0161\u00ed\u0159\u00ed laserem vytvo\u0159en\u00fd paprsek, kter\u00fd (jako ka\u017ed\u00e1 elektromagnetick\u00e1 vlna) m\u00e1 svou ur\u010ditou frekvenci. Pro jednoduchost a p\u0159ehlednost je obvykl\u00e9, kdy\u017e mluv\u00edme o optice, pou\u017e\u00edvat m\u00edsto frekvence v herc\u00edch jej\u00ed inverzn\u00ed hodnotu, co\u017e je d\u00e9lka vlny, kter\u00e1 se v optick\u00e9m rozmez\u00ed m\u011b\u0159\u00ed v nanometrech. Pro p\u0159enos sign\u00e1l\u016f kabelov\u00e9 televize se obvykle pou\u017e\u00edv\u00e1 \u03bb=1550nm.<\/p>\n<p>\u010c\u00e1sti magistr\u00e1ly se spojuj\u00ed sva\u0159ov\u00e1n\u00edm nebo konektory. Podrobn\u011bji o tom lze \u010d\u00edst v <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/193146\/\">v\u00fdborn\u00e9m \u010dl\u00e1nku @stalinets<\/a><\/noindex>. \u0158eknu pouze, \u017ee v s\u00edt\u00edch KTV se t\u00e9m\u011b\u0159 v\u017edy pou\u017e\u00edv\u00e1 \u0161ikm\u00e1 \u00faprava APC. <\/p>\n<p><img decoding=\"async\" alt=\"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165\" src=\"\/wp-content\/uploads\/5d3dadf9f154a8a937721a5547df78c6.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Obr\u00e1zek ze str\u00e1nky fiber-optic-solutions.com<\/i><\/p>\n<p>P\u0159in\u00e1\u0161\u00ed o n\u011bco v\u011bt\u0161\u00ed \u00fatlum ne\u017e p\u0159\u00edm\u00e1, ale m\u00e1 velmi d\u016fle\u017eitou vlastnost: sign\u00e1l odra\u017een\u00fd na spoji se \u0161\u00ed\u0159\u00ed na jin\u00e9 ose ne\u017e hlavn\u00ed sign\u00e1l, co\u017e na n\u011bj m\u00e1 men\u0161\u00ed vliv. Pro digit\u00e1ln\u00ed syst\u00e9my p\u0159enosu se zabudovanou redundanc\u00ed a algoritmy obnovov\u00e1n\u00ed to m\u016f\u017ee vypadat bezv\u00fdznamn\u011b, ale televizn\u00ed sign\u00e1l za\u010dal svou cestu jako analogov\u00fd (v optick\u00fdch vl\u00e1knech tak\u00e9) a pro n\u011bj je to velmi kritick\u00e9: v\u0161ichni si pamatuj\u00ed dvoj\u00ed zobrazov\u00e1n\u00ed nebo zkreslen\u00ed obrazu na star\u00fdch televizorech p\u0159i slab\u00e9m p\u0159\u00edjmu. Takov\u00e9 vlnov\u00e9 jevy jak ve vzduchu, tak v kabelech se mohou vyskytovat. Digit\u00e1ln\u00ed televizn\u00ed sign\u00e1l, i kdy\u017e m\u00e1 vy\u0161\u0161\u00ed odolnost v\u016f\u010di ru\u0161en\u00ed, nem\u00e1 mnoho v\u00fdhod paketov\u00e9ho p\u0159enosu dat a m\u016f\u017ee b\u00fdt tak\u00e9 ovlivn\u011bn na \u00farovni fyziky, ale u\u017e nem\u016f\u017ee b\u00fdt obnoven p\u0159es op\u011btovn\u00fd dotaz.<\/p>\n<p>Aby bylo mo\u017en\u00e9 sign\u00e1l p\u0159en\u00e1\u0161et na zna\u010dn\u00e9 vzd\u00e1lenosti, je zapot\u0159eb\u00ed jeho vysok\u00e9 \u00farovn\u011b, a proto se v \u0159et\u011bzci neobejdeme bez zesilova\u010d\u016f. Optick\u00fd sign\u00e1l v KTV syst\u00e9mech zesiluj\u00ed erbium dopovan\u00e9 zesilova\u010de (EDFA). \u010cinnost tohoto za\u0159\u00edzen\u00ed m\u016f\u017ee slou\u017eit jako skv\u011bl\u00fd p\u0159\u00edklad toho, \u017ee jak\u00e1koli dostate\u010dn\u011b pokro\u010dil\u00e1 technologie je nerozli\u0161iteln\u00e1 od magie. Pokud to shrneme: p\u0159i pr\u016fchodu paprsku vl\u00e1knem s p\u0159\u00edm\u011bs\u00ed erbia se vytv\u00e1\u0159ej\u00ed podm\u00ednky, za kter\u00fdch ka\u017ed\u00fd foton p\u016fvodn\u00edho z\u00e1\u0159en\u00ed vytv\u00e1\u0159\u00ed dva sv\u00e9 klony. Tato za\u0159\u00edzen\u00ed se pou\u017e\u00edvaj\u00ed ve v\u0161ech syst\u00e9mech p\u0159enosu dat na zna\u010dn\u00e9 vzd\u00e1lenosti. Samoz\u0159ejm\u011b nejsou levn\u00e1. Proto v p\u0159\u00edpadech, kdy nen\u00ed pot\u0159eba zesilovat sign\u00e1l na zna\u010dnou \u00farove\u0148 a neexistuj\u00ed p\u0159\u00edsn\u00e9 po\u017eadavky na mno\u017estv\u00ed \u0161umu, se pou\u017e\u00edvaj\u00ed regener\u00e1tory sign\u00e1lu:<\/p>\n<p><img decoding=\"async\" alt=\"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165\" src=\"\/wp-content\/uploads\/629f8aa97d6a0a00ceb8b044d5bdc033.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nToto za\u0159\u00edzen\u00ed, jak je vid\u011bt ze struktur\u00e1ln\u00edho sch\u00e9matu, prov\u00e1d\u00ed dvojitou konverzi sign\u00e1lu mezi optick\u00fdm a elektrick\u00fdm m\u00e9diem. Takov\u00e1 konstrukce umo\u017e\u0148uje v p\u0159\u00edpad\u011b pot\u0159eby zm\u011bnit vlnovou d\u00e9lku sign\u00e1lu.<\/p>\n<p>Takov\u00e9 manipulace, jako je zesilov\u00e1n\u00ed a regenerace sign\u00e1lu, jsou nezbytn\u00e9 nejen k vyrovn\u00e1n\u00ed kilometr\u016f \u00fatlumu kabelu. Nejv\u011bt\u0161\u00ed ztr\u00e1ty nast\u00e1vaj\u00ed p\u0159i d\u011blen\u00ed sign\u00e1lu mezi v\u011btvemi s\u00edt\u011b. D\u011blen\u00ed se prov\u00e1d\u00ed pomoc\u00ed pasivn\u00edch za\u0159\u00edzen\u00ed, kter\u00e1 mohou m\u00edt v z\u00e1vislosti na pot\u0159eb\u011b r\u016fzn\u00e9 mno\u017estv\u00ed odpojek a tak\u00e9 d\u011blit sign\u00e1l jak symetricky, tak asymetricky.<\/p>\n<p><img decoding=\"async\" alt=\"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165\" src=\"\/wp-content\/uploads\/e1b3b0cc2513d8ae8377090a4410d67d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nUvnit\u0159 d\u011bli\u010d p\u0159edstavuje bu\u010f vl\u00e1kna spojen\u00e1 bo\u010dn\u00edmi povrchy, nebo se vyr\u00e1b\u00ed, jako dr\u00e1hy na ti\u0161t\u011bn\u00e9 desce. Pro hloubku doporu\u010duji \u010dl\u00e1nky <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/users\/nagru\/\" class=\"user_link\">NAGru<\/a><\/noindex> o <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nag\/blog\/408963\/\">sva\u0159ovan\u00e9<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nag\/blog\/371203\/\">plan\u00e1rn\u00ed<\/a><\/noindex> d\u011bli\u010de, resp. \u010c\u00edm v\u00edce odpojek m\u00e1 d\u011bli\u010d, t\u00edm v\u011bt\u0161\u00ed \u00fatlum vn\u00e1\u0161\u00ed do sign\u00e1lu.<\/p>\n<p>Pokud k d\u011bli\u010di p\u0159id\u00e1me filtry pro rozd\u011blen\u00ed paprsk\u016f s r\u016fznou vlnovou d\u00e9lkou, m\u016f\u017eeme p\u0159en\u00e1\u0161et sou\u010dasn\u011b dva sign\u00e1ly v jednom vl\u00e1kn\u011b.<\/p>\n<p><img decoding=\"async\" alt=\"Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165 pro nejmen\u0161\u00ed. \u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165\" src=\"\/wp-content\/uploads\/8532a92e861978723ce0a7bb0906346b.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nToto je nejsnaz\u0161\u00ed varianta multiplexov\u00e1n\u00ed na optice \u2013 FWDM. P\u0159ipojen\u00edm za\u0159\u00edzen\u00ed KTV a internetu k vstup\u016fm TV a Express z\u00edsk\u00e1me sm\u00ed\u0161en\u00fd sign\u00e1l v jednom v\u00fdstupu COM, kter\u00fd lze p\u0159en\u00e1\u0161et jedn\u00edm vl\u00e1knem, a na druh\u00e9 stran\u011b ho tak\u00e9 rozd\u011bl\u00edme mezi optick\u00fd p\u0159ij\u00edma\u010d a p\u0159ep\u00edna\u010d, nap\u0159\u00edklad. D\u011bje se to zhruba tak, jak z b\u00edl\u00e9ho sv\u011btla ve sklen\u011bn\u00e9 prism\u011b vznik\u00e1 duha.<\/p>\n<p>C\u00edlem rezervace optick\u00e9ho sign\u00e1lu krom\u011b optick\u00fdch p\u0159ij\u00edma\u010d\u016f se dv\u011bma vstupy, o kter\u00fdch jsem psal <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/454542\/\">v minul\u00e9m d\u00edle<\/a><\/noindex> m\u016f\u017ee b\u00fdt pou\u017eito elektromekanick\u00e9 rel\u00e9, kter\u00e9 m\u016f\u017ee p\u0159ep\u00ednat z jednoho zdroje na druh\u00fd podle zadan\u00fdch parametr\u016f sign\u00e1lu.<br \/>\nP\u0159i degradaci jednoho vl\u00e1kna se za\u0159\u00edzen\u00ed automaticky p\u0159epne na druh\u00e9. Doba p\u0159epnut\u00ed je m\u00e9n\u011b ne\u017e sekundu, tak\u017ee pro u\u017eivatele to v nejhor\u0161\u00edm p\u0159\u00edpad\u011b vypad\u00e1 jako hrst artefakt\u016f na digit\u00e1ln\u00edm televizn\u00edm obraze, kter\u00e9 okam\u017eit\u011b zmiz\u00ed s dal\u0161\u00edm sn\u00edmkem.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/455355\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e\u0442 \u0443\u0436\u0435 \u043c\u043d\u043e\u0433\u043e \u043b\u0435\u0442 \u043e\u0441\u043d\u043e\u0432\u043e\u0439 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0441\u0440\u0435\u0434\u0430. \u0421\u043b\u043e\u0436\u043d\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0445\u0430\u0431\u0440\u0430\u0447\u0438\u0442\u0430\u0442\u0435\u043b\u044f, \u043d\u0435 \u0437\u043d\u0430\u043a\u043e\u043c\u043e\u0433\u043e \u0441 \u044d\u0442\u0438\u043c\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f\u043c\u0438, \u043e\u0434\u043d\u0430\u043a\u043e \u0431\u0435\u0437 \u0445\u043e\u0442\u044f \u0431\u044b \u043a\u0440\u0430\u0442\u043a\u043e\u0433\u043e \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u044f \u043e\u0431\u043e\u0439\u0442\u0438\u0441\u044c \u0432 \u043c\u043e\u0435\u0439 \u0441\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0442\u0435\u0439 \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e. \u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0441\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0442\u0435\u0439 \u0427\u0430\u0441\u0442\u044c 1: \u041e\u0431\u0449\u0430\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0430 \u0441\u0435\u0442\u0438 \u041a\u0422\u0412 \u0427\u0430\u0441\u0442\u044c 2: \u0421\u043e\u0441\u0442\u0430\u0432 \u0438 \u0444\u043e\u0440\u043c\u0430 \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 3: \u0410\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u0430\u044f \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 4: \u0426\u0438\u0444\u0440\u043e\u0432\u0430\u044f \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u0441\u0438\u0433\u043d\u0430\u043b\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-35148","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com 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