Raws li kev xyaum qhia, daim duab ntawm lub vijtsam TV tsis tas yuav txaus siab rau cov neeg siv khoom zoo. Nyob rau hauv tas li ntawd, lub TV teeb liab booster, ib tug ntaus ntawv uas tso cai rau koj los muab qhov zoo tshaj plaws theem ntawm receiver kev ua tau zoo, feem ntau yuav pab tau. Nws tsis poob nws qhov tseeb txawm tias thaum lub sij hawm kev loj hlob sai ntawm cable technology. Qhov tseeb yog tias cov khoom siv no tuaj yeem siv los ntawm cov neeg siv ntawm ob qho tib si sib koom tes thiab "cable" cov neeg siv khoom.
Siv sab nraum nroog
TV teeb liab txhawb rau lub caij ntuj sov tsev lossis tsev tsev yog qhov kev daws teeb meem zoo rau cov neeg nyob sab nraud. Qhov tseeb yog tias qhov tsis muaj peev xwm txuas rau lub network cable, tsis zoo teeb liab txais los ntawm tus kav hlau txais xov, lossis tsuas yog muaj ntau lub receivers (TVs), cov cuab yeej no yog qhov tseem ceeb. Qhov no yog qhov tseeb tshwj xeeb tshaj yog nyob rau hauv qhov chaw uas theem ntawm lub suab nrov ntuj cuam tshuam rau qhov zoo ntawm lub teeb liab. Nws yuav tsum raug sau tseg tias nyob rau hauv cov xwm txheej zoo li no, cov kws tshaj lij pom zoo kom siv cov khoom siv zoo li no, coj mus rau hauv tus accountme ntsis distortion ntawm theem uas characterize lub input teeb liab. Ua ntej siv rau lub TV teeb liab amplifier, theem yog sib npaug ntawm txhua channel nyias.
Kav hlau txais xov amplifiers
Nyob rau hauv cov xwm txheej uas lub teeb liab receiver nyob rau ntawm qhov deb deb ntawm lub TV center, thiab kuj nyob rau hauv thiaj li yuav them rau cov poob uas tshwm sim nyob rau hauv ntev cables, nws yog advisable siv kav hlau txais xov amplifiers. Lawv feem ntau hu ua "active antennas". Thaum thov, kev txhim kho hauv cov teeb liab zoo tuaj yeem yog dav dav (broadband) lossis cais (UHF thiab MV).
amp xaiv
Ib lo lus nug ntawm cov neeg siv khoom feem ntau cuam tshuam nrog lub cuab yeej xws li TV teeb liab amplifier yog: "Kuv yuav xaiv cov cuab yeej zoo rau kuv tus kheej li cas?" Muaj qee qhov tseem ceeb uas yuav tsum xav txog ntawm no. Thawj qhov ntawm cov no yog kev khiav hauj lwm zaus. Qhov tseeb yog tias qhov chaw txais tos ntawm tus kav hlau txais xov nws tus kheej thiab lub amplifier yuav tsum sib phim. Tom ntej no nam yog qhov siab tshaj plaws tso zis theem (yog hais tias tus ntaus ntawv yog zoo, ces qhov ntsuas no yog tsawg kawg yog 100 dB / μV). Qhov thib peb caveat yog tias qhov nce yuav tsum ze li sai tau rau 40 dB. Kev kos tam sim no feem ntau yog nyob rau hauv thaj tsam ntawm 10 txog 60 mA. Summing txog qhov kev xaiv ntawm cov cuab yeej, nws yuav tsum tau muab sau tseg hais tias lub TV teeb liab amplifier yuav tsum muaj lub siab tshaj plaws tau nce ntawm ib tug tsis muaj zog zaus.
Amplifiers rau cablenetworks thiab lawv hom
Kev teeb tsa lub suab nrov rau cable TV cov neeg siv khoom tuaj yeem tshwm sim hauv ntau qhov chaw ntawm lub network. Hauv qhov no, muaj ntau tus qauv ntawm cov khoom siv zoo li no. Lawv qhov kev xaiv feem ntau yog nyob ntawm qhov chaw uas lub cuab yeej yuav raug teeb tsa. Lub hom phiaj tseem ceeb ntawm cov khoom siv no yog lub tsev thiab lub cev amplifiers. Thawj hom yog qhov yooj yim tshaj plaws. Cov khoom siv uas cuam tshuam nrog nws feem ntau yog ntsia hauv cov tsev uas koj xav tau txuas ob peb lub TV. Lub cev amplifiers, raws li lawv lub npe, tau nruab rau hauv cov kab hluav taws xob. Feem ntau, lawv tau nyob rau hauv cov ntaub ntawv molded, yog li lawv tuaj yeem nyob txhua qhov chaw ntawm lub network.
Satellite amplifiers
Satellite TV Signal Amplifier yog ib qho khoom siv tshiab. Nws muab cov neeg siv muaj peev xwm tau txais ob lub TV thiab satellite signals. Thaum nws siv nyob rau ntawm qhov chaw deb ntawm lub kav hlau txais xov, lub teeb liab poob yog them nyiaj thiab nws tau faib rau ntau tus neeg txais. Xws li amplifiers tuaj yeem ua hauv lossis ua haujlwm sib cais.
