Multi-channel digital video optical transceivers tuaj yeem muaj ntau yam haujlwm, thiab txhua hom kev ua haujlwm muaj cov kev xav tau sib xws, xws li video Performance index, audio index, asynchronous data index, Ethernet index, xov tooj Performance index thiab lwm yam. Cov kev qhia tshwj xeeb tuaj yeem xav kom cov chaw tsim khoom muab daim ntawv pov thawj kev xeem thib peb, thiab cov kws ua haujlwm tsim nyog yuav tsum ua cov kev xeem rov qab raws li cov ntsuas tau muab los ntawm cov chaw tsim khoom ua ntej yuav khoom siv los xyuas qhov tseeb ntawm cov khoom siv thiab kev ncaj ncees ntawm cov chaw tsim khoom. Ntawm no yog tsom rau kev piav qhia luv luv hauv qab no ob lub yeeb yaj kiab qhia los ntawm kev xav txog engineering.

Video bandwidth yog ib qho ntawm feem ntau hais txog teeb meem. Tsis txaus video bandwidth, cov ntsiab lus ntawm kev tshuaj ntsuam xyuas tsis meej txaus, kab rov tav kev daws teeb meem yog tsawg, thiab xim loj distortion lossis video poob tshwm sim. Nws yog precisely vim hais tias ntawm qhov tseem ceeb ntawm video bandwidth rau cov duab zoo uas ib co unscrupulous manufacturers txhob txwm exaggerate video bandwidth ntawm lawv cov khoom los dag ntxias cov neeg muas zaub. Piv txwv li, digital video optical transceiver uas tsim los ntawm ib lub chaw tsim khoom thov tias nws cov video bandwidth yog 8M, tab sis nws tshaj tawm cov yeeb yaj kiab piv txwv zaus yog 12.5M. Raws li Nyquist sampling txoj cai, kom rov qab tau cov teeb liab tiag tiag, nws cov qauv zaus yuav tsum yog tsawg kawg yog ob zaug ntawm cov teeb liab zaus, suav nrog txoj kev no, qhov theoretical video bandwidth ntawm qhov chaw tsim khoom optical transceiver tsis tuaj yeem tshaj 6.25M nyob rau hauv txhua rooj plaub. Rau cov tuam txhab engineering dav dav thiab cov neeg siv los ntawm kev soj ntsuam cov ntsiab lus ntawm daim duab, lawv tuaj yeem txiav txim siab txog qhov video bandwidth ntawm lub cuab yeej.

APL yog qhov nruab nrab ntawm cov duab, thiab ntau lub tuam txhab engineering tsis them nyiaj ntau rau lossis tsis paub txog qhov ntsuas no. Txawm li cas los xij, yog tias peb tham txog qhov teeb meem tshwm sim hauv qee qhov haujlwm: cov teeb liab video tau kis los ntawm optical transceiver, thaum muaj thaj tsam loj ntawm cov dawb hauv daim duab (xws li thaum lub koob yees duab tau teeb pom kev zoo los ntawm lub teeb muaj zog), daim duab ntawm tus saib yuav co kab rov tav, ces Cov neeg ua haujlwm engineering yuav tsum tsis muaj neeg txawv. Qhov no yog vim APL ntau yam ntawm video optical transceivers tsim los ntawm qee cov tuam ntxhab yog nqaim dhau. Thaum muaj thaj tsam loj ntawm cov dawb hauv daim duab teeb liab, DC tivthaiv nyob rau hauv txhua kab ntawm cov duab teeb liab nce, thiab APL yuav nce, uas ua rau txo qis hauv amplitude ntawm kab rov tav synchronization teeb liab. Los yog poob lawm, tus saib tsis tuaj yeem ntes cov kab synchronization thiab lub vijtsam shakes.