Yuav tsum muaj cov khoom siv dab tsi rau kev tsim khoom thiab kev sim ntawm 800G optical modules?
Kev sim ntawm 800Gcov khoom siv kho qhov muagsuav nrog kev sim ua haujlwm ntawm kev txais tos thiab kev sim ua haujlwm ntawm kev sib kis. Daim ntawv teev cov khoom siv tseem ceeb thiab cov laj thawj yog raws li nram no:
1. Cov khoom siv kuaj
1.1MCB lub rooj tsavxwm
Teeb tsa ob lub MCB carrier boards kom muab DUT module thiab tus qauv module tso rau. Lub optical module raug ntxig rau hauv lub carrier board thiab txuas nrog lub ntsuas qhov yuam kev los ntawm lub cable RF ceev ceev. Ob lub carrier boards tuaj yeem ua kom muaj kev ywj pheej ntawm kev sim RX thiab kev sim TX. Yog tias siv kev sim loopback, tsuas yog xav tau ib lub carrier board xwb. Lub 800G optical module xav tau txoj kev optical 8T8R, uas sib raug rau qhov xav tau ntawm 16 khub ntawm cov teeb liab sib txawv rau Gold Finger, uas txhais tau tias 32 RF cables / carrier boards.
1.2 Cov Khoom Siv Tswj Kub
Feem ntau cov laug cam MCB muaj cov khoom siv ntsuas kub thiab ntsuas kom txhawb kev ua haujlwm ntawm qhov kub sib txawv. Cov khoom siv tswj kub feem ntau raug thauj mus rau ntawm lub rooj tsavxwm MCB ntawm DUT. Kev koom ua ke tswj kub rau ntawm lub rooj tsavxwm MCB tuaj yeem ua rau cov khoom siv yooj yim dua.
1.3 Lub tshuab ntsuas qhov yuam kev
Teeb tsa ob lub cuab yeej kuaj qhov yuam kev 800G kom tso tawm cov kab lus PRBS thiab tsav RX thiab TX kev xeem raws li. Yog tias tus qauv optical module txhawb nqa PRBS kab lus, nws tuaj yeem txuag ib lub cuab yeej kuaj qhov yuam kev me ntsis thiab siv lub khoos phis tawj sab saud los hais kom tus qauv optical module xa cov kab lus xeem. Tsav RX kev xeem (kev xeem qhov yuam kev me ntsis): Tsim ib qho kab lus xeem, tau txais cov kab lus rov qab, thiab piv qhov yuam kev ntawm lub transmitter thiab receiver, uas yog, qhov yuam kev me ntsis. Tsav TX kev xeem (kev xeem daim duab qhov muag): Tsim ib qho kab lus xeem rau DUT, thiab DUT tso tawm lub teeb raws li kab lus no. Kev koom ua ke sab hauv ntawm MCB carrier board thiab cov khoom siv tswj kub hauv qhov yuam kev code analyzer tuaj yeem ua kom yooj yim dua rau cov khoom siv.
1.4CDR Cov Khoom Siv Moos
Lub teeb liab kho qhov muag raug xa mus tas li, thiab CDR txheeb xyuas ntug ntawm lub sijhawm no los ntawm lub teeb liab kho qhov muag.
1.5 Lub Oscilloscope
Raws li lub sijhawm teeb liab uas CDR muab, cov ntaub ntawv teeb liab kho qhov muag tau muab tso rau ib ntus los tsim daim duab qhia qhov muag. Yog tias lub oscilloscope txhawb nqa 4 lub tswv yim thiab 800G kev sim, ces yuav tsum muaj ob chav. Kim dua, yog tias koj xav txuag nyiaj, koj tuaj yeem siv lub teeb hloov pauv los hloov.
1.6Kev hloov kho qhov muag
Hloov txoj kev pom kev ntawm kev kuaj daim duab qhov muag thiab kev kuaj fais fab.
1.7Lub ntsuas hluav taws xob kho qhov muag
Ntsuas qhov tso zis hluav taws xob optical, 8 channel. Lub ntsuas hluav taws xob optical tuaj yeem koom ua ke rau hauv qhov hloov kho optical, ua kom yooj yim rau cov khoom siv.
1.8 DC fais fab mov
Muab lub zog DC ruaj khov rau MCB carrier board.
2. Kev sim cov txheej txheem tsim kho
2.1. Kev xeem kev ua tau zoo ntawm RX (qhov yuam kev me ntsis, qhov rhiab heev)
Cov teeb liab ntws: Tus ntsuas qhov yuam kev 2 → Tus qauv optical module → Optical attenuator → DUT → Tus ntsuas qhov yuam kev 1
Cov khoom siv tseem ceeb: lub cuab yeej kho qhov muag (siv rau kev luam theej cov ntsiab lus fais fab), lub module kho qhov muag txheem (siv ua lub teeb ci).
Lub Hom Phiaj: Ntsuas qhov yuam kev me ntsis ntawm DUT ntawm ntau lub zog kho qhov muag los ntawm kev hloov pauv tus nqi attenuation.
2.2. Kev ntsuam xyuas kev ua haujlwm ntawm TX emission (daim duab qhov muag, lub zog kho qhov muag)
Cov teeb liab ntws: Tus ntsuas qhov yuam kev 1 → DUT → Qhov hloov kho qhov muag → (lub ntsuas fais fab / oscilloscope + CDR)
Cov khoom siv tseem ceeb: Optical switch (route switching), CDR (moos rov qab, rau PAM4 teeb liab).
Lub Hom Phiaj: Txhawm rau txheeb xyuas lub zog ntawm lub teeb thiab qhov zoo ntawm lub teeb liab (daim duab qhia qhov muag yuav tsum qhia peb lub "qhov muag" ntawm PAM4).
3, Cov ntsiab lus tseem ceeb ntawm kev teeb tsa tshwj xeeb rau kev sim 800G
Qhov ntau ntawm cov channel: 800G txais yuav 8 txoj kab (8T8R), thiab MCB cov ntiv tes hlau ntawm lub rooj tsavxwm yuav tsum sib haum rau 16 khub ntawm cov teeb liab sib txawv (32 RF cables).
Hom teeb liab: Rau PAM4 modulation, lub oscilloscope yuav tsum tau ua ke nrog CDR cov khoom siv kom raug ntes daim duab qhov muag.
Kev daws teeb meem yooj yim: Lub cuab yeej ntes qhov yuam kev tuaj yeem koom ua ke MCB thiab kev tswj kub. Lub qhov hloov kho qhov muag tuaj yeem koom ua ke nrog lub ntsuas hluav taws xob kho qhov muag. Yog tias siv kev sim rov qab voj voog (DUT tus kheej sau), nws tuaj yeem txo ib lub rooj tsavxwm MCB thiab tus qauv module, tab sis cov khoom sim yuav raug txwv.
4. Kev piav qhia txog cov lus tseem ceeb
PRBS: Pseudo random sequence, simulating tiag tiag cov ntaub ntawv traffic.
MCB: Lub rooj tsavxwm ua raws li module, kev sim khoom siv.
CDR: Rov qab tau cov ntaub ntawv moos, rho tawm moos los ntawm cov teeb liab kho qhov muag.
PAM4 daim duab qhia qhov muag: plaub theem pulse amplitude modulation, daim duab qhia qhov muag qhia plaub kauj ruam (peb qhov qhib qhov muag)
Lub sijhawm tshaj tawm: Tsib Hlis-28-2026