A video balun yog ib lub xov tooj txuas uas tso cai rau UTP cable (xws li CAT5) xa cov teeb liab video los ntawm CCTV koob yees duabes tsis txhob siv coaxial cable xws li RG59.
Yuav ua li cas video balun ua haujlwm?
Video Baluns transform the video signal into a balanced form in which every wire in the twisted pair transmits the same signal with opposite polarized magnetic fields. Suab nrov cuam tshuam rau txhua lub teeb liab sib npaug. Thaum cov teeb liab sib xyaw ua ke, lub suab nrov raug tso tseg.
balun ua dab tsi hauv CCTV?
balun yog dab tsi? Ib qho video balun yog ib lub cuab yeej siv los hloov kho hom kev sib txuas kom tso cai siv UTP (Unshielded Twisted Pair) cable los xa cov teeb liab los ntawm lub koob yees duab analog.
balun lub hom phiaj yog dab tsi?
Lub tshuab hloov pauv no yog lub npe hu ua balun, thiab lawv tau ua haujlwm hauv txhua yam ntawm cov xov tooj mus rau cov khoom xa tawm. Baluns yog siv ob qho tib si txhawm rau txheeb xyuas qhov ntws ntawm AC cov cim thiab ua qhov tsim nyog impedance hloov pauv ntawm coaxial cable, uas muaj qhov qis impedance, thiab cov khoom sib npaug, uas muaj impedances siab dua.
Kuv puas xav tau ib lub hnab kom tau txais?
Yog, koj xav tau ib lub pob. Ib qho yooj yim quarter-wave dipole yog sib npaug, coax cable tsis yog.