Umehluko phakathi kwentambo ye-coaxial ne-fiber optical

A. Ikhebula le-Coaxial

​​Ikhebula le-Coaxial, ulayini wekhebula onongqimba lwentambo evalekile esongelwe kukhondukta yethusi emaphakathi. Ibonakala ngekhono elihle lokulwa nokuphazamiseka, idatha yokudlulisela ezinzile kanye nenani elishibhile, futhi isetshenziswa kabanzi, njengezintambo zethelevishini ezivaliwe. Intambo yekhebula elincanyana i-coaxial ngokuvamile ithengiswa emakethe ngamadola ambalwa ngemitha, ayibizi kakhulu. Intambo ye-coaxial isetshenziselwa ukuxhuma nekhanda le-BNC, futhi intambo ye-coaxial ethengiswa emakethe ngokuvamile ixhunywe nekhanda le-BNC, ngakho-ke ungayikhetha ngokuqondile.

　　Nokho, ngokokuhlaziywa kwezici zayo siqu zentambo ye-coaxial, lapho isignali idluliselwa kukhebula le-coaxial, ukuncishiswa kuhlobene nebanga lokudlulisela kanye nemvamisa yesiginali ngokwayo. Ngokuvamile, ukuphakama kwemvamisa yesignali, kukhulu ukuncipha. Umkhawulokudonsa wesiginali yevidiyo mkhulu kakhulu, ufinyelela ku-6MHz, futhi ingxenye yombala yesithombe ilungiswa ekugcineni okuphezulu kwemvamisa, ukuze isiginali yevidiyo ingancishiswa kuphela ubukhulu besiginali lapho idluliswa ikhebula le-coaxial, kodwa futhi ukuncishiswa kwengxenye yemvamisa ngayinye kuhluke kakhulu, ikakhulukazi ingxenye yombala yokuncishiswa inkulu kakhulu. Ngakho-ke, intambo ye-coaxial ifaneleka kuphela ukudluliselwa okuseduze kwamasignali esithombe, futhi lapho ibanga lokudlulisela lifinyelela cishe kumamitha angu-200, ikhwalithi yesithombe izoncishiswa kakhulu, ikakhulukazi umbala uba buthuntu futhi uhlanekezelwe.

　　Ekuzijwayezeni konjiniyela, ukuze ukwandisa ibanga lokudlulisela, ama-amplifiers ama-coaxial asetshenziswa. I-coaxial amplifier inokukhulisa okuthile kwesiginali yevidiyo, futhi inganxephezela usayizi ohlukile wezingxenye zefrikhwensi ngokulungiswa kokulinganisa, ukuze ukuhlanekezela kokuphuma kwesignali yevidiyo kowamukelayo kube kuncane ngangokunokwenzeka. Kodwa-ke, ama-amplifiers e-coaxial awakwazi ukukhishwa ngaphandle komkhawulo. Ngokuvamile, ama-amplifiers ama-coaxial angancishiswa kakhulu ku-2 noma ku-3 ohlelweni lwe-point-to-point, ngaphandle kwalokho ikhwalithi yokudlulisa ividiyo ayikwazi ukuqinisekiswa futhi kunzima ukuyilungisa. Ngakho-ke, lapho usebenzisa izintambo zamakhoaxial ezinhlelweni zokugada, ibanga lokudlulisela ngokuvamile likhawulelwe kumamitha angamakhulu amane noma amahlanu ukuze kuqinisekiswe ikhwalithi yesithombe esihle.

　　Ngaphezu kwalokho, ikhebula elikhoaxial ohlelweni lokuqapha ukudlulisa isignali yesithombe. kukhona ukungalungi okuthile.

　　1, intambo ye-coaxial ngokwayo ithintwa ukushintsha kwesimo sezulu, ikhwalithi yesithombe iyathinteka ngokwezinga elithile;

　　2, intambo ye-coaxial ishubile, izintambo ezilula kancane ezinhlelweni zokuqapha;

　　3, intambo ye-coaxial ingadlulisela kuphela amasiginali wevidiyo, uma isistimu idinga ukudlulisa idatha yokulawula, umsindo nezinye izimpawu ngesikhathi esifanayo, idinga ukuxhunywa izintambo ngokuhlukana;

　　4,Ikhebula le-Coaxial inekhono elilinganiselwe lokunqanda ukuphazamiseka futhi ayikwazi ukusetshenziswa endaweni yokuphazamiseka okuqinile;

　　5, Isikhulisi se-Coaxial siphinde sibe nokungalungi kokulungiswa okunzima.

B. I-Optical Fiber

I-Optical fiber (Ikhebula le-Fiber Optic) idlulisa amasignali ngendlela yama-pulses akhanyayo, ngakho-ke okubalulekile futhi ikakhulukazi ingilazi noma i-plexiglass. Iqukethe i-fiber core, i-cladding kanye nekhava evikelayo.

　Isakhiwo sekhebula le-fiber optic sifana naleso sekhebula i-coaxial ngokuthi indawo ephakathi iyi-fiber optical eyenziwe ngengilazi noma ngepulasitiki ekhanyelayo, ezungezwe into evikelayo, futhi imicu eminingi ingahlanganiswa kukhebula elilodwa le-fiber optic njengoba kudingeka. Kuye ngokuthi isignali ye-optical yenziwa kanjani, imicu ye-optical ingahlukaniswa ibe imicu yemodi eyodwa kanye nemicu ye-multimode.

("Imodi" iwukukhanya okungena kumcu nge-engeli). I-Multimode fiber ngokuvamile isetshenziselwa ukuxhuma amanethiwekhi esakhiweni samahhovisi esisodwa noma ezindaweni ezisondelene kakhulu. Ngakolunye uhlangothi, i-fiber yemodi eyodwa, iletha idatha yekhwalithi ephezulu kumabanga amade futhi ivame ukusetshenziselwa ukuxhuma amanethiwekhi phakathi kwezakhiwo zamahhovisi noma ezindaweni ezihlakazeke kakhulu ngokwendawo. Uma usebenzisa ikhebula le-fiber optic njengendlela yokudlulisa inethiwekhi, udinga futhi ukwengeza ama-transceiver okubona nezinye izinto zokusebenza, ukuze utshalomali lwezindleko lube lukhulu, ngokuvamile izinhlelo zokusebenza zisetshenziswa kancane.

　　Isici esibaluleke kakhulu se-optical fiber ukuthi yenza amasignali abonakalayo, ngakho-ke ayikho ngaphansi kokuphazanyiswa amasignali kagesi angaphandle, futhi izinga lokunciphisa isignali lihamba kancane, ngakho ibanga lokudlulisela isignali likude kakhulu kunokudluliselwa okungenhla kwamasignali kagesi ezintambo ezihlukahlukene zenethiwekhi, futhi lifaneleka ngokukhethekile izindawo ezinezimo ezinzima ze-electromagnetic. Ngenxa yezici ze-optical reflection of optical fibre, i-fiber optical ingadlulisela amasignali amaningi ngesikhathi esisodwa, ngakho-ke isivinini sokudlulisa se-fiber optical singaba phezulu kakhulu, inethiwekhi yamanje ye-1Gbps 1000Mbps fiber optic isibe inethiwekhi yesivinini esiphezulu, ngokusobala inethiwekhi ye-fiber optic ephakeme kakhulu ingafinyelela isivinini esingu-50000Gbps 50Tbps. Kodwa-ke, ukusetshenziswa kwe-fiber optical njengendlela yokudlulisa inethiwekhi kudinga izinga elithile lobuchwepheshe kanye nemishini ekhethekile njengama-transceivers optical, ngakho-ke ukutshalwa kwezindleko kukhulu futhi kungasetshenziswa kancane ekusetshenzisweni okujwayelekile.