Intambo ye-coaxial (emva koku kubhekiselwa kuyo njenge "coax") yintambo equlathe iikondaktari zetsimbi ezimbini ze-coaxial kunye ne-insulated cylindrical ukuze zenze iyunithi esisiseko (i-coaxial pair), kwaye emva koko ibe yi-coaxial pairs ezimbini.Isetyenziselwe ukuhambisa idatha kunye neempawu zevidiyo ixesha elide.Ngomnye weendaba zokuqala zokuxhasa i-10BASE2 kunye ne-10BASE5 Ethernet, kwaye inokufikelela kwi-10 Mb / s yokuhanjiswa kweemitha ze-185 okanye i-500 yeemitha ngokulandelanayo.Igama elithi "coaxial" lithetha ukuba umqhubi ophakathi wentambo kunye nomgangatho wokukhusela une-axis efanayo okanye indawo ephakathi.Ezinye iintambo ze-coaxial zinokuba neeleya ezininzi ezikhuselayo, njengeentambo ezine-coaxial ezikhuselweyo ezine.Intambo iqulethe imigangatho emibini yokukhusela, kwaye uluhlu ngalunye lokukhusela luqulunqwe ngefoyile ye-aluminiyam ehlanganiswe nge-wire mesh.Olu phawu lukhuselayo lwentambo ye-coaxial iyenza ibe namandla okuphazamisana ne-anti-electromagnetic kwaye inokuhambisa imiqondiso ye-frequency ephezulu kumgama omde.Kukho iintlobo ezininzi zeentambo ze-coaxial ezixhasa uluhlu olubanzi lwezicelo zobuchwephesha, ezifana nonxibelelwano lwesathelayithi, ushishino, umkhosi kunye nezicelo zaselwandle.Ezona ntlobo zintathu zixhaphakileyo zeentambo ze-coaxial ezingezizo ezemizi-mveliso yi-RG6, RG11 kunye ne-RG59, apho i-RG6 isetyenziswa kakhulu kwii-CCTV kunye ne-CATV izicelo kwiindawo zamashishini.I-conductor esembindini ye-RG11 ijiyile kune-RG6, nto leyo ethetha ukuba ilahleko yokufakwa kwayo isezantsi kwaye umgama wokuhanjiswa komqondiso nawo unde.Nangona kunjalo, intambo engqindilili ye-RG11 ibiza kakhulu kwaye ayiguquguquki kakhulu, nto leyo eyenza ukuba ingalungeli ukuthunyelwa kusetyenziso lwangaphakathi, kodwa ifaneleke ngakumbi ukufakelwa kwangaphandle okude okanye amakhonkco athe tye.I-flexibility ye-RG59 ingcono kune-RG6, kodwa ilahleko yayo iphezulu, kwaye ayifane isetyenziswe kwezinye izicelo ngaphandle kwe-bandwidth ephantsi, i-low-frequency ye-analog applications yevidiyo ye-analog (iikhamera zokujonga ngasemva ezimotweni) ezinomgama omfutshane kwaye zilinganiselwe. indawo yokubeka.I-impedance ye-coaxial cables nayo iyahluka - ngokuqhelekileyo i-50, 75, kunye ne-93 Ω.I-50 Ω intambo ye-coaxial inamandla aphezulu okusetyenzwa kwamandla kwaye isetyenziswa ikakhulu kwizisasazo zikanomathotholo, ezifana nezixhobo zerediyo zabangaqeqeshwanga, irediyo yebhendi yesizwe (CB) kunye ne-walkie-talkie.Intambo ye-75 Ω inokugcina ngcono amandla omqondiso kwaye isetyenziselwa ikakhulu ukudibanisa iintlobo ezahlukeneyo zezixhobo zokufumana, ezifana nabamkeli be-cable television (CATV), iiseti zikamabonwakude ezicacileyo kunye neerekhoda zevidiyo zedijithali.I-93 Ω intambo ye-coaxial yasetyenziswa kwinethiwekhi ye-IBM ye-mainframe ngeminyaka yee-1970s nasekuqaleni koo-1980, ngezicelo ezimbalwa kakhulu nezixabisayo.Nangona i-75 Ω i-coaxial cable impedance ixhaphake kakhulu kwizicelo ezininzi namhlanje, kufuneka kuqatshelwe ukuba onke amacandelo akwinkqubo ye-coaxial cable kufuneka abe ne-impedance efanayo ukunqanda ukubonakaliswa kwangaphakathi kwindawo yoqhagamshelo enokubangela ukulahleka komqondiso kunye nokunciphisa umgangatho wevidiyo.Isignali yedijithali ye-3 (DS3) isignali esetyenziselwa inkonzo yothumelo ye-ofisi ephakathi (ekwaziwa ngokuba ngumgca we-T3) iphinda isebenzise iintambo ze-coaxial, kuquka i-75 Ω 735 kunye ne-734. Umgama wokugubungela i-735 cable ukuya kwi-69 yeemitha, ngelixa loo nto ye-734 cable ifikelela kwi-137 yeemitha.Intambo ye-RG6 ingasetyenziselwa ukuthumela imiqondiso ye-DS3, kodwa umgama wokugubungela mfutshane.
Uyilo lwe-DB luneseti ezipheleleyo ze-coaxial cable kunye nendibano, enokunceda umthengi ukudibanisa inkqubo yabo.Nceda ucofe ikhonkco elingezantsi ukukhetha iimveliso.Iqela lethu lokuthengisa lihlala lilapha kuwe.
Ixesha lokuposa: Jan-17-2023