Ukutolikwa okunzulu kwejita
Ukuba ireyithi yedatha yenkqubo yonyuswa, i-jitter amplitude elinganiswe kwimizuzwana embalwa iya kuhlala ifana, kodwa xa ilinganiswe kwiqhezu lexesha le-bit, iya kunyuka ngokulinganayo kunye nomlinganiselo wedatha, okukhokelela kwi-bit. iimpazamo. Ke ngoko, i-jitter enxulumeneyo kufuneka incitshiswe kangangoko kunokwenzeka kwisistim yokuphucula ukusebenza kwenkqubo iyonke.
IJitter ichaza ukuguquguquka okuthe tyaba komqondiso, oko kukuthi, ukutenxa kwexesha elifutshane lophawu ukusuka kwindawo yalo efanelekileyo ngexesha elithile.
1. Ukutolikwa kweendawo zokuhlangana
Umlinganiselo we-crossover we-standard standard standard yi-50%, oku kuthetha ukuba uphawu "1" kunye ne "0" nganye i-akhawunti kwisiqingatha senqanaba. Ukulinganisa umlinganiselo wokulungelelaniswa, sebenzisa indlela yokubala eboniswe kumfanekiso. Inqanaba lomnqamlezo liyi-avareji ebalwa ngokwefestile yeziko leenkcukacha-manani ezithe nkqo kwindawo enqamlezileyo, kwaye i-equation yomlinganiso wayo umi ngolu hlobo lulandelayo (apho i-1 kunye ne-0 inqanaba lixabiso eliphakathi kwe-20% embindini wemephu yeso; oko kukuthi, ukuguqulwa ukusuka kwi-40% ukuya kwi-60%
2.Isiphumo
Ikhono lomqondiso we-1 okanye i-0 ukuhambisa ubunzima buhluka kunye nomlinganiselo weendawo zokuwela. Njengoko kubonisiwe kumzobo, umzobo ngakwesobunxele yimephu yamehlo enobudlelwane obuhlukeneyo obunqamlezayo, obuhambelana ne-1 efanelekileyo kunye ne-0 yeempawu ze-pulse ngakwesokudla. Kwangaxeshanye, sinokuqonda kwakhona ubudlelwane phakathi kobubanzi bexesha elihlukeneyo lophawu lwepulse kunye nenxalenye yomnqamlezo wegrafu.
3. Shwankathela
Kwiimpawu eziqhelekileyo, i-avareji yamanqanaba esignali esasazwayo 1 kunye ne-0 zezona ziqhelekileyo. Ngokuqhelekileyo kufunwa ukuba umlinganiselo we-eye-image cross yi-50%, oko kukuthi, ubude be-pulse yesiginali ye-1 kunye ne-0 isetyenziswe njengomgangatho wokuqinisekisa iiparitha ezifanelekileyo. Ngoko ke, uhlalutyo lwelahleko ye-amplitude ehambelanayo ebangelwa ukuphambuka kwamanqanaba ahlukeneyo e-1 kunye ne-0 yesignali inokulinganiswa ngokufanelekileyo ngokusasazwa kobudlelwane bomnqamlezo wamehlo. Umzekelo, ukuba i-eye cross ratio inkulu kakhulu, oko kukuthi, imiqondiso emininzi ye-1 idluliselwe, impazamo yomqondiso, ukukhusela kunye nemida yayo iya kuqinisekiswa ngokuhambelana nobudlelwane bomnqamlezo. I-eye cross ratio incinci kakhulu, oko kukuthi, ukuhanjiswa kweempawu ezininzi zenqanaba le-0, ngokuqhelekileyo kulula ukubangela umqondiso owamkelayo akukho lula ukukhupha i-frequency ukusuka kuyo, okukhokelela ekusileleni ukuvumelanisa, okukhokelela ekulahlekeni kongqamaniso. Ilingana ne-square wave, ekhokelela kukungalingani okuphindaphindwayo, kwaye ngaphantsi kwe-50% yesikwere somlinganiselo wamaza..
Oku ngasentla yi-Shenzhen HDV Phoeletron Technology Ltd. ukuzisa abathengi malunga nenqaku lentshayelelo "Imephu ye-Optical eye ingcaciso esisiseko II", kwaye inkampani yethu iyimveliso ekhethekileyo yabenzi benethiwekhi yamehlo, iimveliso ezibandakanyekayo.I-ONUuthotho (OLT I-ONU/ACI-ONU/CATVI-ONU/GPONI-ONU/XPONI-ONU), uchungechunge lwemodyuli ye-Optical (imodyuli yefiber optical / Ethernet imodyuli yefiber optical / SFP imodyuli yokubona),OLT-kwiimodyuli-kwiimodyuli/">OLTuthotho (OLTizixhobo /OLT tshintsha/ikati yamehloOLT), njl., kukho iinkcukacha ezahlukeneyo zeemveliso zonxibelelwano kwiimfuno zeemeko ezahlukeneyo zenkxaso yenethiwekhi, wamkelekile ukubonisana.