Tus kho qhov muag hluav taws xob yuav tsum muaj qhov kev sib kis tau zoo, thiab nws cov kis tau lub zog kho qhov muag thiab tau txais lub zog kho qhov muag yuav tsum tsis pub dhau ib txwm. Yog li yuav ua li cas los ntsuas seb cov teeb meem kis tau los thiab lub zog tau txais ntawm lub teeb tsa hluav taws xob kho qhov muag tsis pub dhau ib txwm?
Feem ntau hais lus, cov neeg siv khoom lag luam tuaj yeem ncaj qha soj ntsuam seb qhov hloov kho lub zog thiab tau txais lub zog ntawm lub teeb tsa hluav taws xob yog qhov qub los ntawm DDM kev ua haujlwm (kev kuaj mob digital soj ntsuam muaj nuj nqi) ntawm qhov ntsuas kho qhov muag.
Txawm li cas los xij, yog hais tias DDM cov ntaub ntawv ntawm cov kho qhov muag tsis zoo los yog tsis txhawb nqa lub luag haujlwm no, nws raug pom zoo tias koj ua ntej teeb meem kho qhov muag ntawm lub teeb tsa kho qhov muag, thiab tom qab ntawd daws qhov teeb meem, koj tuaj yeem tau txais tus nqi ntawm tus khoos phis tawj' s; kis lub zog kho qhov muag thiab txais lub zog kho qhov muag.
Ntxiv rau, koj tuaj yeem siv lub ntsuas fais fab kho qhov muag kom tau txais cov khoom sib kis nqi ntawm lub ntsuas hluav taws xob. Noj 10GBASE-LR SFP + optical module ua piv txwv, cov kauj ruam xeem yog raws li hauv qab no:
1. Yog hais tias ntsuas tau ntsuas kis tau tus mob hluav taws xob lossis tau txais lub zog kho qhov muag yog qhov qis dua -30dBm (suav nrog -30dBm), nws yog feem ntau vim tias tsis muaj cov cim qhia tau raug kis lossis tau txais.
2. Yog tias txais lub zog kho qhov muag yog qhov qis dua -14dBm (suav nrog -14dBm), feem ntau yog vim muaj qee yam tsis ua haujlwm hauv cov khoom siv cable, xws li cov khoom siv tsis zoo, cov kab sib txuas, thiab siv cov khoom siv kho qhov muag fiber, ua rau cov teeb meem loj heev poob.
