{"id":32308,"date":"2019-10-31T21:46:16","date_gmt":"2019-10-31T18:46:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-1-obshhaya-arhitektura-seti-ktv\/"},"modified":"2019-10-31T21:46:16","modified_gmt":"2019-10-31T18:46:16","slug":"seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-1-obshhaya-arhitektura-seti-ktv","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-1-obshhaya-arhitektura-seti-ktv","title":{"rendered":"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/1d0b5616b4d48429ff1130f6a7ddd519.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKuigi haritud kogukond kritiseerib televisiooni negatiivset m\u00f5ju teadlikkusele, on televisioonisignaal siiski kohal peaaegu k\u00f5ikides eluruumides (ja paljudes mitteeluruumides). Suurtes linnaosades on see peaaegu alati kaabeltelevisioon, isegi kui k\u00f5ik nimetavad seda harjumusest \"antenni\". Kui \u00f5huteenuse vastuv\u00f5tuseade on t\u00e4iesti selge (kuigi see v\u00f5ib samuti erineda tavalisest aknalaual olevast sarvehantennist, millest r\u00e4\u00e4gin kindlasti hiljem), siis kaabeltelevisiooni s\u00fcsteem v\u00f5ib oma t\u00f6\u00f6 ja arhitektuuri osas tunduda ootamatult keeruline. Kavatsen seda teemat k\u00e4sitleda artiklite seerias. Soovin tutvustada huvilisi KTV-v\u00f5rkude t\u00f6\u00f6p\u00f5him\u00f5tetega ning nende ekspluateerimise ja diagnostikaga.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<ul>\n<li>Osa 1: Kaabli-TV v\u00f5rgu \u00fcldine arhitektuur<\/li>\n<li>Osa 2: Signaali koostis ja vorm<\/li>\n<li>Osa 3: Signaali analoogne komponent<\/li>\n<li>Osa 4: Signaali digitaalne komponent<\/li>\n<li>Osa 5: Koaksiaalne jaotamisv\u00f5rk<\/li>\n<li>Osa 6: RF-signaali v\u00f5imendid<\/li>\n<li>Osa 7: Optilised vastuv\u00f5tjad<\/li>\n<li>Osa 8: Optiline peav\u00f5rk<\/li>\n<li>Osa 9: Peajaam<\/li>\n<li>Osa 10: Veaotsing ja t\u00f5rgete k\u00f5rvaldamine kaabli-TV v\u00f5rgus<\/li>\n<\/ul>\n<p>\nMa ei p\u00fc\u00fca kirjutada k\u00f5ikeh\u00f5lmavat \u00f5pikuk, vaid p\u00fc\u00fcan j\u00e4\u00e4da teaduspopi raamidesse, et mitte koormata artikleid valemite ja tehnoloogiate kirjeldusega. Just sellep\u00e4rast j\u00e4tsin tekstis \"nutikad\" s\u00f5nad seletamata; otsides nende kohta internetist, saate s\u00fc\u00fcvida nii palju, kui vajate. Sest eraldi on k\u00f5ik h\u00e4sti kirjeldatud ja mina r\u00e4\u00e4gin vaid sellest, kuidas see k\u00f5ik kokku moodustab kaabeltelevisiooni s\u00fcsteemi. Esimeses osas kirjeldan ma pinnapealselt v\u00f5rgu struktuuri ja hiljem r\u00e4\u00e4gin p\u00f5hjalikumalt kogu s\u00fcsteemi t\u00f6\u00f6p\u00f5him\u00f5tetest.<\/p>\n<p>Kaabeltelevisiooni v\u00f5rgul on puu struktuur. Signaal moodustatakse keskjaamas, mis kogub signaale erinevatest allikatest, moodustab neist \u00fche (antud sagedusplaani alusel) ja edastab selle p\u00f5hijagamisse v\u00f5rku vajalikus formaadis. T\u00e4nap\u00e4eval on p\u00f5hiv\u00f5rk loomulikult optiline ja signaal muutub koaksiaalkaablisse vaid l\u00f5puseisukohas.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/37edbbd7285262255690695d8e7fa5ce.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h1>Peajaam<\/h1>\n<p>\nSignaali allikad peakomplektile v\u00f5ivad olla nii satelliitantennid (mida v\u00f5ib olla mitu tosinat), kui ka digitaalsete voogude edastamine otse telekanalite v\u00f5i teiste sideoperaatorite poolt. Erinevate allikate signaali vastuv\u00f5tmiseks ja kogumiseks kasutatakse mitme kanaliga multiservice dekoodereid\/modulaatoreid, mis on aluste \u0161assi, millel on erinevad laienduskaardid, mis tagavad erinevate liideste \u00fchendamise ning signaali dekoodimise, modulaatorimise ja kujundamise. <\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/c06a1127de73e1f8c4baf6f67388c3d7.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Siin n\u00e4eme n\u00e4iteks 6 satelliittelevisiooni signaali vastuv\u00f5tu moodulit ja kahte DVB-C v\u00e4ljundmodulaatorit.<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/6d2da0e5dc7a105e8bcac2498928870a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Ja see \u0161assi tegeleb signaali deskrambleerimisega. N\u00e4ha on CAM mooduleid, samasuguseid, nagu sisestatakse teleritesse tasuliste kanalite vastuv\u00f5tmiseks.<\/i><\/p>\n<p>Selle seadme t\u00f6\u00f6 tulemuseks on v\u00e4ljundsignaal, mis sisaldab k\u00f5iki kanaleid, mida me abonentidele edastame, jaotatuna sageduste kaupa vastavalt m\u00e4\u00e4ratud sagedusplaanile. Meie v\u00f5rgus on see vahemik 49 kuni 855 MHz, mis sisaldab nii analoogkanaleid kui ka digitaalseid kanaleid formaatides DVB-C, DVB-T ja DVB-T2:<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/c38ced0832fe7d7a277d60171995cf87.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Signaali spektri kuvamine.<\/i><\/p>\n<p>Vormitud signaal edastatakse optilisse saatjasse, mis on p\u00f5him\u00f5tteliselt meediamuudatus ja viib meie kanalid optilisse keskkonda televisioonile omasesse lainepikkusesse 1550 nm.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/1fabae514f2402917cc033f437d56d36.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Optiline saatja.<\/i><\/p>\n<h1>Peamine jaotusv\u00f5rk<\/h1>\n<p>\nPeasilmast p\u00e4rit optiline signaal v\u00f5imendatakse tuttava optilise erbiummu (EDFA) abil, mis on igale sideinimesse tuttav.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/5a60d6c0ac5c5ab369eeec05fbdfb8e5.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV\u00f5imendi v\u00e4ljundist saadud paar k\u00fcmmet dBm signaali taset saab juba jagada ja saata erinevatesse piirkondadesse. Jagamine toimub passiivsete jagurite abil, mis on mugavalt paigutatud rack-t\u00fc\u00fcpi krossidesse.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/01c767a0760c1764ea0ae8e94b888e41.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Optiline jagur \u00fche \u00fchiku optilises krossis.<\/i><\/p>\n<p>Jagatud signaal j\u00f5uab objektidesse, kus seda saab vajadusel v\u00f5imendada sarnaste v\u00f5imendite abil, v\u00f5i jagada teiste seadmetega.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/56dad363be688d3d175f62dfcf61bdf7.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNii v\u00f5ib v\u00e4lja n\u00e4ha elamupiirkonna s\u00f5lme. See sisaldab optilist v\u00f5imendit, signaalijagurit rack-t\u00fc\u00fcpi krossi korpuses ja jaotavat optilist krossi, mille kaudu kiud jagunevad optiliste vastuv\u00f5tjate poole.<\/p>\n<h1>Kliendi jaotusv\u00f5rk<\/h1>\n<p>\nOptilised vastuv\u00f5tjad, nagu ka edastajad, on keskkonna konverterid: nad edastavad saadud optilise signaali koaksiaalkaabli kaudu. Optilised vastuv\u00f5tjad v\u00f5ivad olla erinevad ja erinevate tootjate, kuid nende funktsioon on tavaliselt sama: signaali taseme j\u00e4lgimine ja p\u00f5hilised kohandused, millest r\u00e4\u00e4gin p\u00f5hjalikult j\u00e4rgmistes artiklites.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/7ad3b7f20cf7161ced23e7cd0b4a5dbc.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Optilised vastuv\u00f5tjad, mida kasutatakse meie v\u00f5rgus.<\/i><\/p>\n<p>S\u00f5ltuvalt hoonete arhitektuurist (korruste arv, korpuste ja sissep\u00e4\u00e4sude arv jne) v\u00f5ib optiline vastuv\u00f5tja olla iga sakki alguses v\u00f5i v\u00f5ib neid olla \u00fcks mitme jaoks (m\u00f5nikord on isegi hoonete vahel paigaldatud mitte optiline, vaid koaksiaalkaabel), sellisel juhul kompenseeritakse jagajate ja peajoonte v\u00e4ltimatud kaduvate signaalide eest v\u00f5imendustega. N\u00e4iteks sellised nagu see:<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/a0fd51fe4fd14de6d567c2f098b59085.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>KTV signaaliv\u00f5imendi Teleste CXE180RF<\/i><\/p>\n<p>Tellijate jaotuv v\u00f5rk ehitatakse erinevatest koaksiaalkaablitest ja erinevatest jagajatest, mida saate n\u00e4ha oma trepikoda n\u00f5rkvoolu jaotuskilbis.<\/p>\n<p><img decoding=\"async\" alt=\"Kaabeltelevisiooni v\u00f5rgud lastele. Osa 1: \u00dcldine KTV v\u00f5rgu arhitektuur\" src=\"\/wp-content\/uploads\/2019\/04\/49e9dbaa5370f78788b3acacac8e2b92.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTellijate jagajate v\u00e4ljunditesse on \u00fchendatud kaablid, mis viivad korterisse. <\/p>\n<p>Muidugi on enamikus korterites mitu telerit, mis on \u00fchendatud t\u00e4iendavate jaoturitega, mis samuti p\u00f5hjustavad signaali n\u00f5rgenemist. Seet\u00f5ttu tuleb m\u00f5ningatel juhtudel (kui suures korteris on palju telerit) korteris paigaldada t\u00e4iendavad signaaliv\u00f5imendid, mis on selleks kasutamiseks v\u00e4iksemad ja n\u00f5rgemad kui peamised v\u00f5imendid.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449322\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0430\u043a \u0431\u044b \u043f\u0440\u043e\u0441\u0432\u0435\u0449\u0451\u043d\u043d\u043e\u0435 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u043d\u0435 \u0440\u0443\u0433\u0430\u043b\u043e \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u0435 \u0437\u0430 \u043d\u0435\u0433\u0430\u0442\u0438\u0432\u043d\u043e\u0435 \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u0441\u043e\u0437\u043d\u0430\u043d\u0438\u0435, \u0442\u0435\u043c \u043d\u0435 \u043c\u0435\u043d\u0435\u0435, \u0442\u0435\u043b\u0435\u0432\u0438\u0437\u0438\u043e\u043d\u043d\u044b\u0439 \u0441\u0438\u0433\u043d\u0430\u043b \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u043e \u0432\u0441\u0435\u0445 \u0436\u0438\u043b\u044b\u0445 (\u0438 \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u043d\u0435\u0436\u0438\u043b\u044b\u0445) \u043f\u043e\u043c\u0435\u0449\u0435\u043d\u0438\u044f\u0445. \u0412 \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0433\u043e\u0440\u043e\u0434\u0430\u0445 \u044d\u0442\u043e \u043f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435\u0433\u0434\u0430 \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u0435 \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u043e\u0435, \u0434\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u0432\u0441\u0435 \u0432\u043e\u043a\u0440\u0443\u0433 \u043f\u043e \u043f\u0440\u0438\u0432\u044b\u0447\u043a\u0435 \u043d\u0430\u0437\u044b\u0432\u0430\u044e\u0442 \u0435\u0433\u043e \u00ab\u0430\u043d\u0442\u0435\u043d\u043d\u0430\u00bb. \u0418 \u0435\u0441\u043b\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043f\u0440\u0438\u0451\u043c\u0430 \u044d\u0444\u0438\u0440\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u044f \u0432\u043f\u043e\u043b\u043d\u0435 \u043e\u0447\u0435\u0432\u0438\u0434\u043d\u0430 (\u0445\u043e\u0442\u044f \u0442\u043e\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":24125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-32308","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 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