Thaum lubkis tau tus mobntawm lub cev channel yog siab dua qhov kev thov ntawm ib lub teeb liab, cov channel tuaj yeem sib koom los ntawm ntau lub teeb liab.Piv txwv li, lub cev kab ntawm lub xov tooj system feem ntau muaj ntau txhiab lub teeb liab kis tau los ntawm ib qho khoom siv kho qhov muag. Multiplexing yog cov thev naus laus zis uas daws cov teeb meem siv cov channel xa tawm ntau lub teeb liab tib lub sijhawm. Lub hom phiaj yog ua kom siv tag nrho cov zaus band lossis lub sijhawm cov peev txheej ntawm cov channel thiab txhim kho kev siv tus nqi ntawm cov channel.
Muajob txoj kev ntawm teeb liab multiplexing: zaus division multiplexing (FDM) thiab lub sij hawm division multiplexing (TDM) Lub sij hawm division multiplexing feem ntau yog siv rau multiplexing ntawm cov teeb liab digital. Kev faib ntau zaus multiplexing feem ntau yog siv rau multiplexing ntawm analogue signals tab sis kuj tseem siv tau rau cov teeb liab digital. Tshooj lus no yuav tham txog lub hauv paus ntsiab lus thiab kev siv ntawm FDM.
Kev faib ntau zaus Multiplexingyog ib txoj kev multiplexing uas faib cov channel raws li zaus. Hauv FDM, qhov bandwidth ntawm ib channel tau muab faib ua ntau qhov ntau zaus (sub-channels) uas tsis sib tshooj. Txhua lub channel ntawm cov teeb liab nyob ntawm ib qho ntawm cov kab sib txuas, thiab cov khoom siv zaus tsis siv (tus neeg saib xyuas bands) yuav tsum tau tshwj tseg ntawm cov channel los tiv thaiv cov teeb liab sib tshooj. Thaum qhov kawg tau txais, qhov tsim nyog band-pass lim cais ntau lub teeb liab thiab rov qab tau cov cim xav tau.
Cov duab hauv qab no qhialub hauv paus ntsiab lus thaiv daim duab ntawm lub zaus division multiplexing system. Thaum kawg ntawm kev xa tawm, txhua lub suab nrov hauv lub suab yog thawj zaug dhau los ntawm cov lim dej qis (LPF) kom txwv qhov siab tshaj plaws ntawm txhua lub teeb liab. Tom qab ntawd, txhua lub channel ntawm cov teeb liab raug hloov mus rau qhov sib txawv ntawm cov neeg nqa khoom ntau zaus, kom txhua qhov channel ntawm cov teeb liab tau txav mus rau nws qhov ntau zaus, thiab tom qab ntawd ua ke thiab xa mus rau cov channel rau kev sib kis. Ib series ntawm band-pass lim nrog ntau qhov chaw frequencies ntawm qhov kawg tau txais yog siv los cais cov teeb liab modulated. Tom qab lawv demodulated, qhov sib thooj baseband cov cim ntawm txhua channel tau zoo lawm.
Txhawm rau tiv thaivkev cuam tshuamnruab nrab ntawm cov teeb liab uas nyob ib sab, tus cab kuj zaus F yuav tsum tau xaiv kom zoo_ c1,f_ c2, ···, f_ Cn kom muaj qee qhov chaw zov me nyuam tshwj xeeb ntawm cov teeb liab modulated spectrums.
Qhov no yog dab tsiShenzhen HDV phoelelectron Technology Co., Ltd. tau coj tuaj rau koj txog kev paub txog kev faib ntau zaus multiplexing. Kuv vam tias tsab xov xwm no tuaj yeem pab koj nce koj txoj kev paub. Dhau li ntawm tsab xov xwm no yog tias koj tab tom nrhiav rau lub tuam txhab kev sib txuas lus zoo fiber ntau cov khoom lag luam koj tuaj yeem xav txogtxog peb.
Shenzhen HDV photoelectric Technology Co., Ltd. yog lub chaw tsim khoom ntawm cov khoom sib txuas lus. Tam sim no, cov cuab yeej tsim tawm npog covONU series, Optical module series, OLT series, thiabtransceiver series. Peb tuaj yeem muab cov kev pabcuam customized rau cov xwm txheej sib txawv. Zoo siab txais tossab laj.
