Kahor fahamka tikniyoolajiyadda Pam4, waa maxay tikniyoolajiyadda is-beddelka? Teknolojiyadda Moducalation waa farsamada loo beddelayo calaamadaha balaalka (calaamadaha korantada ceyriinka ah) calaamadaha gudbinta. Si loo hubiyo waxtarka isgaarsiinta oo laga gudbiyo dhibaatooyinka gudbinta calaamadaha masaafada dheer, waxaa lagama maarmaan ah in la wareejiyo muuqaalka sectal secutrum si looga soo qaado kanaalka sare ee is-dhexgalka.
PAM4 waa PAM-da afraad ee Pulloudel Pulloude Filiid Pulloudel (PAM).
Cinwaanka Pam waa tikniyoolajiyad gudbinta calaamadaha caanka ah kadib nrz (oo aan ku noqon eber).
Calaamadaha NRZ waxay isticmaashaa laba heerar oo digniin ah, sare, oo hooseeya, si ay u matalaan 1 iyo 0 ee calaamadaha caqliga dhijitaalka ah, waxayna u gudbin karaan 1 xoogaa macluumaad macquul ah.
SAXIIXADA PAM4 EE SAXIIXA 4 Heerarka Digniinta ee Kala-sooca ee Sifooyinka, oo saacadda kasta waxay u gudbin kartaa 2 meelood oo macluumaad macquul ah, oo ah 00, 01, 10, iyo 11.
Sidaa darteed, isla xaaladaha qiimaynta ee isla ballanta, sicirka 'PAM4' ayaa labanlaab ah laba jibaar oo ah NRZ astaan, oo ay sii jirtay hufnaanta faafinta iyo si wax ku ool ah u dhimaysa kharashaadka.
Tiknolojiyadda Pam4 ayaa si weyn loogu adeegsaday duurka ku saabsan is-dhexgalka xawaaraha xawaaraha sare. Waqtigan xaadirka ah, waxaa jira cutubyo muuqaal ah oo ah 400g muuqaal ah oo ku saleysan tikniyoolajiyadda PAM4
Habka hirgelinta ee cutubka 400G DML-ka ee Transcevervechiver-ka 400-ka ee 'PAM4' ayaa ah sida soo socota: Marka lasoconayo calaamadaha unugga ee 25g NRZ ee ah 25G4 calaamadaha korantada, oo ah astaamaha korantada, oo lagu rakibay chip-ka wadaha. Calaamadaha korantada ee xawaaraha sare ayaa loo beddelaa 8Gnels 50gbs oo ah calaamadaha indhaha ee sare ee fiilada illaa 8-yada la-tanaasha ah, oo ay weheliso meeris gorgor badan, oo lagu dhejiyo 1 kanaal oo ah 400g oo ah soosaarka visical. Markaad heleyso calaamadaha unugga, oo ah 1-Channel 400G 400G 400G 400G 400G 400G 400G 400G Ka dib soo kabashada saacadda, cod-weyneynta, is-qiimaynta, iyo pam4 nacaybka chip-ka dsp, seenyaalaha korantada waxaa loo beddelaa 16 kanaal oo ah 25g nrz elektral.
Codso tikniyoolajiyada PAM4 ee ku habboon 400GB / s optical modules. 400GB / mitical / mitical ee ku saleysan isbadalka PAM4 waxay yareyn kartaa tirada lasers-ka loo baahan yahay ee gudbinta iyo u dhiganta tirada qaatayaasha loo baahan yahay ee la xiriira farsamooyinka is-dhexgalka ee soo-jiidashada ah marka loo eego NRZ. Isdumradda PAM4 waxay yareysaa tirada qaybaha indhaha ee mobilada indhaha, kaas oo keeni kara faa'iidooyin sida kharashaadka shirka hoose, isticmaalka awooda, iyo cabirka baakadaha yar.
Waxaa jira baahiyo loogu talagalay models 50gbit / s ah oo ku jira wax-ka-gudbinta iyo shabakadaha dib-u-iibinta iyo xalka ku saleysan 25g aaladda indhaha oo ay ka soo kordhiyaan qaab-dhismeedka PAM4 ee PAM4 waxaa loo qaatay in lagu gaaro shuruudaha khasabka ah iyo xad-dhaafka badan.
Markaad sharaxayso calaamadaha pam-4, waxaa muhiim ah in fiiro gaar ah la siiyo farqiga u dhexeeya heerka buundada iyo xoogaa heerka. Calaamadaha NRZ ee NRZ, maadaama hal astaan u gudbisa hal xog ah, heerka xoogaa iyo heerka buundada waa isku mid. Tusaale ahaan, 100g Ethernet, oo adeegsanaya afar 25.78125gboud calaamadaha faafinta, waxoogaa sicirka seenyaalaha kastaa sidoo kale waa 25.78125gbs, iyo afarta calaamadood ee ku guuleysta gudbinta calaamadaha 100GBPS; Wixii calaamado ah ee pam-4, maadaama hal astaan u gudbisa 2 meelood oo xog ah, heerka waxoogaa loo kala qaadi karo waa laba jibaar sicirka buundada. Tusaale ahaan, adoo adeegsanaya 4 wanaaladood oo ah 26.562gboud oo ah 26.562GBBaud oo ah gudbinta 200g Ethernet, sicirka waxoogaa kanaaladu waa 53.125-ka-ka-hanashada calaamadaha ayaa gaari kara gudbinta calaamadaha 200GBPS. 400g Ethernet, waxaa lagu gaari karaa 8 kanaalo oo ah 26.5625gboud calaamadaha.
Waqtiga Post: Jan-02-2025