Ndi zida ziti zomwe zimafunika popanga ndi kuyesa ma module a 800G optical?
Kuyesa kwa 800Gma module opticalzikuphatikizapo kuyesa magwiridwe antchito a phwando ndi kuyesa magwiridwe antchito a mayendedwe. Mndandanda waukulu wa zida ndi malingaliro ndi awa:
1, zida zoyesera
1.1MCB bolodi yonyamulira
Konzani ma board awiri a MCB carrier kuti muyike DUT module ndi standard motsatana. Optical module imayikidwa mu carrier board ndikulumikizidwa ku error code meter kudzera mu high-speed RF cable. Ma board awiri a carrier amatha kutsimikizira kuti RX testing ndi TX testing zikuyenda paokha. Ngati mukugwiritsa ntchito loopback testing, carrier board imodzi yokha ndiyo ikufunika. 800G optical module imafuna 8T8R optical path, yomwe ikugwirizana ndi zofunikira za ma pair 16 a differential signals a Gold Finger, zomwe zikutanthauza ma cable 32 RF/carrier boards.
1.2 Zipangizo Zowongolera Kutentha
Mabodi onyamulira a MCB nthawi zambiri amakhala ndi zida zowunikira kutentha ndi kutentha kuti zithandizire magwiridwe antchito oyesera kutentha kosiyanasiyana. Zipangizo zowongolera kutentha nthawi zambiri zimayikidwa pa bolodi lonyamulira la MCB la DUT. Kuphatikiza zowongolera kutentha pa bolodi lonyamulira la MCB kungathandize kuti zida zikhale zosavuta.
1.3 Chowunikira ma code olakwika
Konzani zoyeserera zolakwika ziwiri za 800G bit kuti zitulutse ma PRBS sequences ndikuyendetsa mayeso a RX ndi TX motsatana. Ngati module yodziwika bwino ya optical ikuthandizira PRBS sequence, imatha kusunga chowunikira cholakwika cha bit imodzi ndikugwiritsa ntchito kompyuta yapamwamba kulamula module yodziwika bwino ya optical kuti itumize ma test sequence. Drive RX test (bit error test): Pangani ma test sequence, landirani return sequence, ndikuyerekeza cholakwika pakati pa transmitter ndi receiver, ndiko kuti, bit error. Drive TX test (eye diagram test): Pangani ma test sequence a DUT, ndipo DUT imatulutsa kuwala motsatira ma test sequence awa. Kuphatikiza kwamkati kwa MCB carrier board ndi zida zowongolera kutentha mu error code analyzer kungathandize kwambiri kuti zidazi zikhale zosavuta.
Zipangizo za Wotchi ya 1.4CDR
Chizindikiro cha kuwala chimatumizidwa nthawi ndi nthawi, ndipo CDR imazindikira malire a nthawi ino kuchokera ku chizindikiro cha kuwala.
1.5 Oscilloscope
Malinga ndi chizindikiro cha nthawi chomwe CDR imapatsa, deta ya chizindikiro cha kuwala imayikidwa nthawi ndi nthawi kuti ipange chithunzi cha diso. Ngati oscilloscope imathandizira ma inputs 4 ndi mayeso a 800G, ndiye kuti mayunitsi awiri amafunika. Mtengo wake ndi wokwera kwambiri, ngati mukufuna kusunga ndalama, mutha kugwiritsa ntchito switch yowunikira kuti musinthe.
1.6Chosinthira cha kuwala
Sinthani njira yowunikira pakati pa kuyesa chithunzi cha maso ndi kuyesa mphamvu.
1.7Mita yamagetsi yowunikira
Yesani mphamvu yotulutsa kuwala, njira 8. Choyezera mphamvu yowunikira imatha kuphatikizidwa mu switch yowunikira, zomwe zimapangitsa kuti zida zikhale zosavuta.
Mphamvu yamagetsi ya 1.8 DC
Perekani mphamvu yokhazikika ya DC ku bolodi lonyamulira la MCB.
2, mfundo yomanga dongosolo loyesera
2.1. Mayeso a RX reception performance (chiwerengero cha zolakwika za bit, kukhudzidwa)
Kuyenda kwa chizindikiro: Chowunikira ma code olakwika 2 → Module yodziwika bwino ya kuwala → Chowunikira ma optical → DUT → Chowunikira ma code olakwika 1
Zipangizo zofunika: chochepetsera kuwala (chogwiritsidwa ntchito pofufuza malo amphamvu), module yodziwika bwino ya kuwala (yogwiritsidwa ntchito ngati gwero la kuwala).
Cholinga: Kuyeza kuchuluka kwa zolakwika za DUT pamagetsi osiyanasiyana posintha kuchuluka kwa kuchepa kwa mphamvu.
2.2. Mayeso a TX emission performance (chithunzi cha maso, mphamvu ya kuwala)
Kuyenda kwa chizindikiro: Chowunikira khodi yolakwika 1 → DUT → Chosinthira cha kuwala → (choyezera mphamvu/oscilloscope+CDR)
Zipangizo zazikulu: Chosinthira cha kuwala (kusintha njira), CDR (kubwezeretsa wotchi, kuti zizindikiro za PAM4 zigwiritsidwe ntchito).
Cholinga: Kutsimikizira mphamvu ya kuwala komwe kumatulutsa komanso khalidwe la chizindikiro (chithunzi cha maso chiyenera kuwonetsa "maso" atatu a PAM4).
3, Mfundo zazikulu za kasinthidwe kapadera ka mayeso a 800G
Kuchuluka kwa njira: 800G imagwiritsa ntchito njira 8 (8T8R), ndipo zala zachitsulo za bolodi lonyamula la MCB ziyenera kufanana ndi mawiri 16 a zizindikiro zosiyana (zingwe 32 za RF).
Mtundu wa chizindikiro: Pakusintha kwa PAM4, oscilloscope iyenera kugwirizanitsidwa ndi zida za CDR kuti ijambule molondola chithunzi cha diso.
Yankho losavuta: Chowunikira zolakwika chimatha kuphatikiza ntchito za MCB ndi zowongolera kutentha. Chosinthira cha kuwala chikhoza kuphatikizidwa ndi choyezera mphamvu ya kuwala. Ngati kuyesa kwa loop back (DUT self collecting) kukugwiritsidwa ntchito, kumatha kuchepetsa bolodi limodzi lonyamula la MCB ndi module yokhazikika, koma zinthu zoyesera zitha kukhala zochepa.
4, Kufotokozera mawu ofunikira
PRBS: Kutsatana kwachinyengo mwachisawawa, kutsanzira kuchuluka kwa deta yeniyeni.
MCB: Bolodi lonyamulira kutsatira module, choyezera.
CDR: Kubwezeretsa deta ya wotchi, kuchotsa wotchi kuchokera ku zizindikiro zowala.
Chithunzi cha maso cha PAM4: kusintha kwa ma pulse amplitude a milingo inayi, chithunzi cha maso chikuwonetsa masitepe anayi (magawo atatu a maso)
Nthawi yotumizira: Meyi-28-2026