Qhov hloov A / B yog ib qho khoom siv pab cuam tshuam rau TV uas tso cai rau ob RF (xov tooj cua zaus) / coaxial cov cuab yeej txuas mus rau tib lub tswv yim ntawm RF / coaxial. Nws tso cai rau koj mus rau toggle ntawm ob lub tshooj hluav taws xob ua ke ntawm ib qho kev saib xyuas nkaus xwb. Nrog RF inputs qhov peb xim-coded inputs ntawm RCAs , nws txuas mus rau 75-Ohm cable.
A / B keyboards sib txawv hauv style; qee qhov muaj yooj yim, nws yog xim hlau casings, hos lwm tus yog cov yas nrog kev tswj cov chaw taws teeb.
Yuav Siv A / B Cov Ntaub Ntawv Uas Siv Tau Li Cas?
Ntawm no yog peb hom scenarios uas koj siv tau A / B hloov:
- Koj muaj ib qho HDTV, sau npe mus rau analog cable, thiab siv lub kav hlau txais xov. Vim tias feem ntau cov HDTVs muaj ib tus neeg siv roj RF, koj xav tau qhov kev hloov A / B los txuas tus analog cable thiab kav hlau txais xov mus rau hauv RF input rau ntawm HDTV . Qhov no yuav ua rau muaj peev xwm los hloov ntawm ob qhov kev tawm tsam RF tsis muaj kev cuam tshuam cov cables.
- Koj muaj ib qho DTV analog thiab siv DTV converter, antenna, thiab VCR. Koj xav mus saib TV hauv ib qho channel thaum VCR kaw rau lwm tus. Muab tus DTV converter tswj cov teeb liab khoom rau lub VCR, koj xav tau tiag tiag ob yam khoom kom ua li no: kev hloov A / B thiab ib qho splitter. Txuas tus kav hlau txais xov mus rau splitter, uas muab faib rau ib qho kev tawm tswv yim rau ob qho kev tawm. Ob lub cables mus rau lwm txoj hauv kev kom txog thaum rov tuaj rau ntawm A / B hloov. Nyeem ntxiv txog qhov scenario no .
- Koj xav saib xyuas ob lub koob yees duab txau ntawm ib qho kev saib xyuas nkaus xwb. Lub koob yees duab ntawm cov zis yog RF, yog li koj xav tau ib coaxial cable. Tus saib cov zaub muaj tsuas yog ib qho kev sib txuas lus. Txuas rau txhua lub koob yees duab rau A / B hloov kom koj thiaj li hloov tau ntawm lub koob yees duab thawj zaug thiab ob.