Tom qab qhov kho qhov muag module tau teeb tsa, kev sim nws qhov kev ua tau zoo yog ib qho tseem ceeb kauj ruam.Thaum cov khoom siv kho qhov muag hauv lub network tag nrho tau muab los ntawm tib tus neeg muag khoom, yog tias lub network system tuaj yeem ua haujlwm ib txwm, tsis tas yuav cais cov khoom sib txuas. ntawm qhov system.Txawm li cas los xij, feem ntau ntawm cov khoom sib txuas hauv lub network feem ntau yog los ntawm cov neeg muag khoom sib txawv.Yog li ntawd, kev ntsuam xyuas cov khoom siv kho qhov muag, tshwj xeeb tshaj yog kev ua haujlwm thiab kev sib cuam tshuam ntawm txhua qhov kho qhov muag yog qhov tseem ceeb.Yog li cas koj sim qhov kev ua tau zoo ntawm ib qho optical module?
Lub optical module yog tsim los ntawm lub transmitter thiab receiver.Thaum lub transmitter txuas nrog lub receiver los ntawm optical fiber, yog tias qhov kev ua yuam kev ntawm tag nrho lub cev tsis ua tiav qhov kev xav tau, nws puas yog teeb meem transmitter lossis teeb meem receiver?Qhov kev sim kho qhov muag module feem ntau muab faib ua plaub kauj ruam, uas feem ntau muab faib ua cov kev ntsuam xyuas rau lub transmitter thiab receiver.
Transmitter xeem
Thaum kuaj, koj yuav tsum tau them sai sai rau lub wavelength thiab cov duab ntawm lub transmitter tso zis waveform, nrog rau lub jitter kam rau ua thiab bandwidth ntawm lub receiver.Thaum kuaj lub transmitter, koj yuav tsum tau them sai sai rau ob lub ntsiab lus hauv qab no: Ua ntej: qhov zoo ntawm cov khoom siv hluav taws xob siv los ntsuas lub transmitter yuav tsum zoo txaus. Tsis tas li ntawd, qhov zoo ntawm kev ntsuas hluav taws xob yuav tsum tau lees paub los ntawm kev ntsuas jitters thiab Qhov muag daim duab ntsuas. Qhov muag daim duab ntsuas yog ib txoj hauv kev los xyuas cov zis waveform ntawm lub transmitter vim lub qhov muag daim duab muaj ntau cov ntaub ntawv uas qhia txog tag nrho cov kev ua tau zoo ntawm lub transmitter.
Thib ob: Qhov tso zis hluav taws xob kho qhov muag ntawm lub transmitter yuav tsum ntsuas los ntawm qhov ntsuas qhov muag pom zoo xws li qhov muag daim duab ntsuas, kho qhov muag hloov kho qhov amplitude thiab extinction piv.
Txais kev kuaj
Thaum kuaj lub receiver, koj kuj yuav tsum tau xyuam xim rau ob lub ntsiab lus hauv qab no:
Ua ntej: Tsis zoo li lub tshuab xa hluav taws xob, qhov zoo ntawm cov teeb liab kho qhov muag yuav tsum tsis txaus txaus thaum kuaj tus txais.Yog li ntawd, daim duab qhia lub teeb lub qhov muag uas sawv cev rau qhov teeb meem phem tshaj plaws yuav tsum tau tsim.Qhov teeb meem kho qhov muag tsis zoo no yuav tsum dhau lub jitters.Kev ntsuas thiab ntsuas hluav taws xob kho qhov muag yog siv rau kev ntsuas.
Thib ob: Thaum kawg, koj yuav tsum tau kuaj lub receiver's electronic output signal.Muaj peb hom kev xeem loj:
Kev ntsuam xyuas qhov muag: Qhov no ua kom ntseeg tau tias "qhov muag" ntawm daim duab qhov muag qhib.Kev ntsuam xyuas qhov muag feem ntau yog ua tiav los ntawm qhov tob ntawm qhov yuam kev me ntsis
Jitter test: kuaj ntau hom kev jitter
Jitter nrhiav thiab kam rau ua: Kuaj qhov kev taug qab ntawm jitter los ntawm lub moos sab hauv rov qab
Lub teeb kuaj module yog ib txoj haujlwm nyuaj, tab sis nws kuj yog ib qho tseem ceeb uas yuav tsum tau ua kom paub tseeb tias nws qhov kev ua tau zoo.Raws li kev ntsuas kev siv dav dav, qhov ntsuas qhov muag tuaj yeem ntsuas qhov emitter ntawm optical module.Kev kuaj receiver ntawm optical module yog qhov nyuaj thiab xav tau ntau txoj hauv kev sim.