Coaxial cable (eo ka mor'a moo e bitsoang "coax") ke thapo e nang le li-conductors tse peli tsa coaxial le insulated cylindrical metal ho etsa yuniti ea mantlha (coaxial pair), ebe ho latela lipara tse peli tsa coaxial.E 'nile ea sebelisoa ho fetisetsa matšoao a data le video ka nako e telele.Ke e 'ngoe ea mecha ea phatlalatso ea pele e tšehetsang 10BASE2 le 10BASE5 Ethernet,' me e ka finyella phetiso ea 10 Mb / s ea limithara tse 185 kapa limithara tse 500 ka ho latellana.Lentsoe "coaxial" le bolela hore mokhanni o bohareng oa mohala le lera la eona le sireletsang li na le axis e tšoanang kapa ntlha e bohareng.Lithapo tse ling tsa coaxial li ka ba le likarolo tse ngata tse sireletsang, joalo ka likhoele tse sirelelitsoeng tse nne tsa coaxial.Mohala o na le likarolo tse peli tsa tšireletso, 'me karolo e' ngoe le e 'ngoe ea tšireletso e entsoe ka foil ea aluminium e phuthetsoeng ka mesh ea terata.Tšobotsi ena e sireletsang ea thapo ea coaxial e e etsa hore e be le bokhoni bo matla ba ho sitisa motlakase oa motlakase 'me e ka fetisa matšoao a maqhubu a phahameng sebakeng se selelele.Ho na le mefuta e mengata e fapaneng ea likhoele tsa coaxial tse ts'ehetsang lits'ebetso tse fapaneng tsa litsebi, joalo ka likhokahano tsa sathelaete, lits'ebetso tsa indasteri, sesole le tsa metsing.Mefuta e meraro e tloaelehileng haholo ea lithapo tsa coaxial tseo e seng tsa indasteri ke RG6, RG11 le RG59, tseo RG6 e sebelisoang haholo lits'ebetsong tsa CCTV le CATV libakeng tsa likhoebo.Mokhanni oa bohareng oa RG11 o motenya ho feta RG6, e leng se bolelang hore tahlehelo ea ho kenngoa ha eona e tlaase le sebaka sa phetisetso ea pontšo le eona e telele.Leha ho le joalo, thapo e teteaneng ea RG11 e theko e boima haholo ebile ha e feto-fetohe, e leng se etsang hore e se tšoanelehe bakeng sa ho romelloa lits'ebetsong tsa ka hare, empa e loketse haholoanyane bakeng sa ho kenya ka ntle ho nako e telele kapa lihokelo tse otlolohileng tsa mokokotlo.Ho feto-fetoha ha maemo ha RG59 ho molemo ho feta RG6, empa tahlehelo ea eona e phahame, 'me ha e sebelisoe hangata lits'ebetsong tse ling ntle le li-bandwidth tse tlaase, lik'hamera tsa morao-rao ka likoloi) tse nang le sebaka se sekhutšoanyane le se fokolang. sebaka sa sekotjana.Ho kenella ha likhoele tsa coaxial le hona hoa fapana - hangata ke 50, 75, le 93 Ω.Mohala oa coaxial oa 50 Ω o na le matla a phahameng a ho sebetsa 'me o sebelisoa haholo bakeng sa li-transmitters tsa seea-le-moea, joalo ka lisebelisoa tsa seea-le-moea tse sa sebetseng, radio band radio (CB) le walkie-talkie.Mohala oa 75 Ω o ka boloka matla a lets'oao hamolemo 'me o sebelisoa haholo ho hokela mefuta e fapaneng ea lisebelisoa tse amohelang, joalo ka li-reccering tsa cable television (CATV), li-high-definition sets le lirekoto tsa video tsa dijithale.93 Ω coaxial cable e ne e sebelisoa ho IBM mainframe network lilemong tsa bo-1970 le mathoasong a lilemo tsa bo-1980, ka lisebelisoa tse fokolang haholo le tse turang.Le hoja 75 Ω coaxial cable impedance e atisa ho kopana le lits'ebetso tse ngata kajeno, ho lokela ho hlokomeloa hore likarolo tsohle tsa tsamaiso ea cable ea coaxial li lokela ho ba le ts'oaetso e ts'oanang ho qoba ho bonahatsa ka hare ho sebaka sa ho hokahanya ho ka bakang tahlehelo ea matšoao le ho fokotsa boleng ba video.Letšoao la dijithale la 3 (DS3) le sebelisetsoang tšebeletso ea phetisetso ea ofisi e bohareng (eo hape e tsejoang e le mohala oa T3) le eona e sebelisa likhoele tsa coaxial, ho kenyeletsoa 75 Ω 735 le 734. Sebaka sa tšireletso sa 735 cable se fihla ho limithara tse 69, athe seo ea 734 cable e fihla ho limithara tse 137.Cable ea RG6 e ka boela ea sebelisoa ho fetisa matšoao a DS3, empa sebaka sa tšireletso se khuts'oane.
Moralo oa DB o na le lisebelisoa tse felletseng tsa thapo ea coaxial le kopano, e ka thusang moreki ho kopanya sistimi ea bona.Ka kopo, tobetsa sehokelo se ka tlase ho khetha lihlahisoa.Sehlopha sa rona sa barekisi se lula se le teng molemong oa hau.
Nako ea poso: Jan-17-2023