75 ohm coaxial cable, lub npav teb chaws yog lub xov tooj hluav taws xob RF, nrog rau cov khoom siv thiab foamed cables. Tam sim no sawv daws hu xov tooj SYV cable cable cable thiab SYWV RF cable.
Feem ntau siv coaxial cables muaj ob pawg loj ntawm 50 thiab 75 ohm yam ntxwv impedance. Kev sib txuas lus kev lag luam feem ntau siv 50 ohms, yees duab kis mus rau hauv kev lag luam hauv TV thiab kev ruaj ntseg kev lag luam, tag nrho siv 75 ohm yam ntxwv impedance.
Rau cov teeb meem high-zaus, qhov kev faib khoom faib tawm ntawm qhov cable yuav sib npaug ntawm tus impedance ntawm 75 ohms. Qhov no impedance yog ib tug sib npaug xeeb thiab tsis yog tangible resistor, yog li nws yog hu ua "yam ntxwv impedance". Qhov txoj kab uas hla ntawm sab hauv thiab txheej neeg ntawm cov coaxial cable, lub dielectric qhov ntawm lub nruab nrab cov kab tho txawv yog txawv, thiab tuaj yeem hais tau hais tias txawv txav cov yam ntxwv impedances, uas yuav loj los me. Txawm li cas los xij, thaum lub impedance ntawm kev kis kab mob sib txawv, ib lub teeb meem ntawm lub zog yog generated, thiab cov yam ntxwv impedance yog teem rau 75 ohms. Kev kwv yees yog qhov tshwm sim ntawm "standardization".
Pib 75 ohm coaxial cable, siv cov khoom zoo siab PVC, tsis muaj peev xwm ua rau lub cev tsis muaj zog PE sab hauv tsev thaiv thiab siab purity oxygen dawb tooj (OFC); 100% shielding kev ua tau zoo, ua yeeb yaj duab dluab meej thiab muaj tseeb dua, nrog Lub TV RF lub vev-xaij txuas nrog RF lub teeb liab ntawm high-end TV xws li ib lub tiaj tus, plasma lossis rear projection TV.