Zeziphi izixhobo ezifunekayo kwimveliso novavanyo lweemodyuli ze-optical ze-800G?
Uvavanyo lwe-800Giimodyuli ezibonakalayoibandakanya uvavanyo lokusebenza kokwamkelwa kunye novavanyo lokusebenza kokudluliselwa. Uluhlu oluphambili lwezixhobo kunye nengqiqo zezi zilandelayo:
1, izixhobo zovavanyo
Ibhodi yokuthwala ye-1.1MCB
Lungiselela iibhodi ezimbini zokuthwala ze-MCB ukuze ubeke imodyuli ye-DUT kunye nemodyuli eqhelekileyo ngokulandelelanayo. Imodyuli ye-optical ifakwe kwibhodi yokuthwala kwaye iqhagamshelwe kwimitha yekhowudi yempazamo ngentambo ye-RF ekhawulezayo. Iibhodi ezimbini zokuthwala zinokuqinisekisa ukuzimela kovavanyo lwe-RX kunye novavanyo lwe-TX. Ukuba usebenzisa uvavanyo lwe-loopback, kufuneka ibhodi enye yokuthwala kuphela. Imodyuli ye-optical ye-800G ifuna indlela ye-optical ye-8T8R, ehambelana neemfuno zeepere ezili-16 zeempawu zomahluko zeGold Finger, oko kuthetha iintambo ze-RF ezingama-32/iibhodi zokuthwala.
1.2 Izixhobo zoLawulo loBushushu
Iibhodi zokuthwala i-MCB zihlala zixhotyiswe ngezixhobo zobushushu kunye nokufumanisa ukuxhasa ukusebenza kovavanyo kumaqondo obushushu ahlukeneyo. Izixhobo zokulawula ubushushu zihlala zilayishwa kwibhodi yokuthwala i-MCB ye-DUT. Ukudibanisa ulawulo lobushushu kwibhodi yokuthwala i-MCB kunokwenza izixhobo zibe lula.
1.3 Isihlalutyi sekhowudi yempazamo
Lungiselela abavavanyi ababini bempazamo ye-800G bit ukuze bakhuphe ulandelelwano lwe-PRBS kwaye baqhube uvavanyo lwe-RX kunye ne-TX ngokulandelelana. Ukuba imodyuli eqhelekileyo ye-optical ixhasa ulandelelwano lwe-PRBS, ingagcina isixhobo sokubona iimpazamo se-bit enye kwaye isebenzise ikhompyutha ephezulu ukuyalela imodyuli eqhelekileyo ye-optical ukuthumela ulandelelwano lovavanyo. Uvavanyo lwe-Drive RX (uvavanyo lwempazamo ye-bit): Yenza ulandelelwano lovavanyo, ufumane ulandelelwano lokubuyisela, kwaye uthelekise impazamo phakathi komthumeli kunye nomamkeli, oko kukuthi, impazamo ye-bit. Uvavanyo lwe-Drive TX (uvavanyo lwesazobe samehlo): Yenza ulandelelwano lovavanyo lwe-DUT, kwaye i-DUT ikhupha ukukhanya ngokwale landelelwano. Ukuhlanganiswa kwangaphakathi kwebhodi yokuthwala ye-MCB kunye nezixhobo zokulawula ubushushu kwi-analyzer yekhowudi yempazamo kunokwenza lula izixhobo.
Izixhobo zewotshi ze-1.4CDR
Isignali ye-optical ithunyelwa rhoqo, kwaye i-CDR ichonga umda weli xesha lexesha ukusuka kwisignali ye-optical.
1.5 I-Oscilloscope
Ngokwesiginali yexesha enikwe yi-CDR, idatha yesiginali ye-optical ifakwa rhoqo ukuze yenze umzobo weliso. Ukuba i-oscilloscope ixhasa ama-input ama-4 kunye novavanyo lwe-800G, kufuneka iiyunithi ezimbini. Kubiza kakhulu, ukuba ufuna ukonga imali, ungasebenzisa iswitshi yokukhanyisa ukutshintsha.
1.6Utshintsho lwe-Optical
Tshintsha indlela yokujonga phakathi kovavanyo lwedayagramu yamehlo kunye novavanyo lwamandla.
1.7Imitha yamandla e-Optical
Linganisa amandla okukhanya aphumayo, iitshaneli ezisi-8. Imitha yamandla okukhanya ingadibaniswa kwiswitshi yokukhanya, nto leyo eyenza kube lula izixhobo.
Umbane we-DC oyi-1.8
Nika amandla e-DC azinzileyo kwibhodi ye-MCB carrier.
2, ingqiqo yokwakha inkqubo yovavanyo
2.1. Uvavanyo lokusebenza kokwamkelwa kwe-RX (isantya sempazamo yebhithi, uvakalelo)
Ukuhamba kwesignali: Isihlalutyi sekhowudi yempazamo 2 → Imodyuli eqhelekileyo ye-optical → Isithinteli se-Optical → I-DUT → Isihlalutyi sekhowudi yempazamo 1
Izixhobo eziphambili: i-optical attenuator (esetyenziselwa ukuskena iindawo zombane), i-optical module eqhelekileyo (esetyenziswa njengomthombo wokukhanya).
Injongo: Ukulinganisa izinga lempazamo ye-bit ye-DUT kumandla ahlukeneyo okukhanya ngokutshintsha ubungakanani bokunciphisa.
2.2. Uvavanyo lokusebenza kokukhutshwa kwe-TX (umzobo wamehlo, amandla okukhanya)
Ukuhamba kwesignali: Isihlalutyi sekhowudi yempazamo 1 → I-DUT → Iswitshi ye-Optical → (imitha yamandla/i-oscilloscope+CDR)
Izixhobo eziphambili: Iswitshi ye-optical (ukutshintsha indlela), i-CDR (ukubuyisela iwotshi, kwiimpawu ze-PAM4).
Injongo: Ukuqinisekisa amandla okukhanya akhutshwayo kunye nomgangatho wesignali (umzobo wamehlo kufuneka ubonise "amehlo" amathathu e-PAM4).
3, Amanqaku aphambili oqwalaselo olukhethekileyo lovavanyo lwe-800G
Ubungakanani betshaneli: I-800G isebenzisa iziteshi ezi-8 (8T8R), kwaye ibhodi yokuthwala i-MCB iminwe yesinyithi kufuneka ihambelane neepere ezili-16 zeempawu zokwahluka (iintambo ze-RF ezingama-32).
Uhlobo lweSignali: Ukuze kuguqulwe i-PAM4, i-oscilloscope kufuneka idityaniswe nezixhobo ze-CDR ukuze ibambe ngokuchanekileyo umzobo weliso.
Isisombululo esilula: Isixhobo sokubona iimpazamo sinokudibanisa imisebenzi ye-MCB kunye nolawulo lobushushu. Iswitshi ye-optical inokudityaniswa nemitha yamandla e-optical. Ukuba kusetyenziswa uvavanyo lwe-loop back (i-DUT self collecting), inokunciphisa ibhodi enye yokuthwala ye-MCB kunye nemodyuli eqhelekileyo, kodwa izinto zovavanyo zinokulinganiselwa.
4, Ingcaciso yamagama aphambili
I-PRBS: Ulandelelwano olungacwangciswanga lwe-Pseudo, olulinganisa ithrafikhi yedatha yokwenyani.
I-MCB: Ibhodi yokuthwala ukuthobela imodyuli, isixhobo sovavanyo.
I-CDR: Ukubuyiswa kwedatha yewotshi, ukukhupha iwotshi kwimiqondiso yokukhanya.
Umzobo wamehlo we-PAM4: ukuguquguquka kwe-pulse amplitude yenqanaba elinesine, umzobo wamehlo ubonisa amanyathelo amane (ukuvulwa kwamehlo amathathu)
Ixesha leposi: Meyi-28-2026