Mufananidzo 6-6 ibhuroka dhayagiramu yeyakajairwa dhijitari baseband chiratidzo chekufambisa system. Iyo inonyanya kuumbwa neyekutapurirana sefa (chiteshi chiratidzo jenareta), chiteshi, sefa yekugamuchira, uye sampling yekusarudza. Kuti uve nechokwadi chekushanda kwakavimbika uye kwakarongeka kwehurongwa, panofanirawo kuve neiyo synchronization system.
Mabasa echivharo chega chega mumufananidzo uye maitiro ekutapurirana echiratidzo anotsanangurwa muchidimbu sezvinotevera:
(1) Chiratidzo chechiteshi chekare (kutumira sefa). Basa rayo ndere kugadzira baseband sign waveform yakakodzera kutapurirana chiteshi. Nekuti kupinza kwayo kunowanzo kuve iyo yekufambisa kodhi inogadzirwa nekodhi mhando encoder, inoenderana basic waveform inowanzoita rectangular pulse, uye spectrum yayo yakakura kwazvo, iyo isingakodzeri kutapurirana. Iyo yekufambisa sefa inoshandiswa kudzvanya iyo yekuisa chiratidzo bhendi uye kushandura kodhi yekutumira kuita baseband chiratidzo chewaveform chakakodzera chiteshi kufambisa.
(2) Channel. Isvikiro inobvumira masaini ebhendi kuti apfuure, kazhinji chiteshi chine waya, senge yakamonyoroka pair, coaxial tambo, nezvimwe. Hunhu hwekutapurirana hwechiteshi kazhinji hahusangane nemamiriro ekutapurirana-asina kukanganisa, saka iyo waveform yekufambisa ichaita. kukanganiswa. Uye zvakare, ruzha n (T) inounzwa muchiteshi, uye inofungidzirwa kuti iGaussian chena ruzha ine kukosha kwe zero.
(3) Sefa yekugamuchira Inoshandiswa kugamuchira masaini, kusefa kunze kwechiteshi ruzha uye kumwe kupindira zvakanyanya sezvinobvira, kuenzana hunhu hwechiteshi, uye kuita kuti inobuda baseband waveform ienderane nesampling sarudzo.
(4) Sample Selector. Iko kuenzanisa uye kuona iyo yakabuda waveform yeinogamuchira sefa panguva yakafanotemerwa (inodzorwa neiyo bit timing pulse) kuitira kudzoreredza kana kuburitsa iyo baseband chiratidzo pasi pemashure ekusingagutse hunhu hwekufambisa uye ruzha.
(5) Pulse nguva uye synchronous extraction bit timing pulse inoshandiswa kuita sampling inotorwa kubva kune yakagamuchirwa chiratidzo neiyo synchronous yekubvisa wedunhu. Iko kurongeka kweiyo bit time kunobata zvakananga mhedzisiro yesarudzo.
Uku ndiko kuumbwa kwedhijitari baseband signal transmission system yakaunzwa kwauri neShenzhen HDV Phoelectron Technology Co., Ltd. Ndinovimba chinyorwa ichi chinogona kukubatsira iwe kuwedzera ruzivo rwako. Kunze kwechinyorwa ichi kana iwe uchitsvaga yakanaka optical fiber yekutaurirana michina yekugadzira kambani yaungafunganezvedu.
Shenzhen HDV photoelectric Technology Co., Ltd. inonyanya kugadzira zvigadzirwa zvekutaurirana. Parizvino, midziyo inogadzirwa inovhara iyoONU series, Optical module series, OLT series,uyetransceiver series. Isu tinogona kupa masevhisi akagadziridzwa kune akasiyana mamiriro. Unogamuchirwaconsult.
