Umzobo we-6-6 ngumzobo webhloko wenkqubo yokuhanjiswa kwesignali ye-digital baseband eqhelekileyo. Ikakhulu yenziwe sisihluzo sothumelo (ijenereyitha yomqondiso wetshaneli), itshaneli, isihluzo solwamkelo, kunye nesigqibo sesampulu. Ukuze kuqinisekiswe ukusebenza okuthembekileyo nokucwangcisiweyo kwenkqubo, kufuneka kwakhona kubekho inkqubo yongqamaniso.
Imisebenzi yebhloko nganye kumzobo kunye nenkqubo yomzimba yokuhanjiswa komqondiso ichazwa ngokufutshane ngolu hlobo lulandelayo:
(1) Umqondiso wejelo langaphambili (isihluzi sothumelo). Umsebenzi wayo kukuvelisa i-baseband signal waveform efanelekileyo ukuhanjiswa kwejelo. Ngenxa yokuba igalelo layo ngokuqhelekileyo liyikhowudi yothumelo eyenziwa yikhowudi yohlobo lwe-encoder, i-waveform esisiseko ehambelanayo idla ngokuba yi-pulse rectangular, kwaye i-spectrum yayo ibanzi kakhulu, engafanelekanga ukuhanjiswa. Isihluzi sothumelo sisetyenziselwa ukucinezela ibhendi yesignali yegalelo kunye nokuguqula ikhowudi yokuhambisa ibe yi-baseband signal waveform elungele ukuhanjiswa kwetshaneli.
(2) Umjelo. Yindlela evumela imiqondiso ye-baseband ukuba idlule, ngokuqhelekileyo itshaneli enentambo, njengesibini esijijekileyo, intambo ye-coaxial, njl. njl. zigqwethekile. Ukongeza, ingxolo n (T) ingeniswe kwitshaneli, kwaye kucingelwa ukuba yingxolo emhlophe yaseGaussian enexabiso eliphakathi kwe-zero.
(3) Isihluzo solwamkelo Sisetyenziselwa ukufumana imiqondiso, ukuhluza ingxolo yesitishi kunye nolunye uphazamiseko kangangoko kunokwenzeka, ukulinganisa iimpawu zetshaneli, kunye nokwenza imveliso ye-baseband waveform ilungele ukuthatha izigqibo.
(4) Umkhethi wesampuli. Kukwenza isampulu kunye nokumisela i-wave wave yesihluzo esifumanayo ngexesha elimisiweyo (elilawulwa yi-bit time pulse) ukuze ubuyise okanye uvelise kwakhona umqondiso we-baseband phantsi kwemvelaphi yeempawu ezingonelisiyo zothumelo kunye nengxolo.
(5) Ixesha le-Pulse kunye ne-synchronous extraction bit timing pulse esetyenziselwa isampulu zitsalwa kwisignali efunyenweyo yi-synchronous extraction circuit. Ukuchaneka kwexesha elincinci kuya kuchaphazela ngqo umphumo wesigqibo.
Oku kukwakhiwa kwenkqubo yokuhanjiswa komqondiso we-digital baseband eziswe yi-Shenzhen HDV Phoelectron Technology Co., Ltd. kuwe. Ndiyathemba ukuba eli nqaku linokukunceda ukwandisa ulwazi lwakho. Ngaphandle kweli nqaku ukuba ujonge inkampani elungileyo yomenzi wezixhobo zonxibelelwano lwefiber onokuthi uyithathele ingqalelongathi.
I-Shenzhen HDV photoelectric Technology Co., Ltd. ikakhulu ngumvelisi weemveliso zonxibelelwano. Okwangoku, izixhobo eziveliswayo zigubungela iONU series, uthotho lwemodyuli yokubona, OLT series, kwayetransceiver series. Sinokubonelela ngeenkonzo ezilungiselelwe iimeko ezahlukeneyo. Wamkelekile ukubabonisana.
