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200GЩ£QSFP56 QSFP-DD
б Դ ڣ 2021.11.24

֪200GֽȻͬļһʹQSFP-DDװľ8x25G NRZƣһּDzQSFP56װ4x50GG߿ɴﵽ56GҲ4x56GPAM4ơ

200G QSFP-DD

200G8x25G NRZ QSFP-DD߱˵͹ġʱײơ

͹ģNRZȺPAM4жԱȣ9.54dBNRZշȽϣʵPAM4һշΪ˸߼ľ⹦ȻPAM4ƻָӲҹĸߵ⣬NRZĻ󽵵ͣŻĵOPEXȴЧ˵ַʽȽ

ʱPAM4СյӰԣͬ½ʸߣҪFECǰƣӶӴʱӣһֲNRZڹرFECʵ1E-15BERʱͣʱŵӦó£硰Ƶס糡±ֳɫ

ײΪںݵıҪ󣬲PAM4ʱڱNRZ·߼״£ڴPHYÿһҪPAM4һ25G NRZоƬ͹ҵ걸ϵ200G˿ڵĽ200GƷףѸҵ

ƣ200G QSFP-DDڲͳɱ⻥200G QSFP-DD SR8PSM8LR8

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200G QSFP56飺

˵200G QSFP56Ӧõͨ56GҪ󣬿56Gźŵͨ뷴ȷʵ56 GbpsУNRZ fNyquist = 56/2 = 28 GHzPAM4 fNyquist = 56/4 = 14 GHzPAM4NyquistƵNRZNyquistƵʵһ룬һʺIEEE 802.3NyquistƵ14 GHzʱIJԼ33.35 dB28 GHzNyquistƵʣͬʾԼ62 dBIJģЩرʹPAM4ʱжԱȣʹNRZⱳҪѶȡ

4*50Gbps PAM4200G䣬NRZһҪʹ825Gͨʵ200G䡣һܽԼ˳ɱܽڼ·ġ

200G QSFP56200G QSFP56 SR4DR4FR4LR4ER4

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200G ѡ

ĵĿٷչ21ͣݵĴҲ֮ؽߵĴ͸ߵܶзչ

QSFP-DDװĿǰ400G̫гܻӭķװͣⲢQSFP56װ͵̭û400GĶԣ200G QSFP56װ鲿200G̫ѡ񡣵ǿ400G200G QSFP-DDװ黹ǸΪøЧķ

200GƷ鼰DAC/AOC200G QSFP56 SR4ʺ϶̾ݴ䣬۽ͽ뽻Ļ200G QSFP56 FR4LeafSpine200G QSFP-DD LR8ͨһͶе·Ľͻ۽֮ݴ乤200G DACAOCһ㲿ڽ뽻ͷ֮䡣

ڵײ뽻ͷУʹֱDACAOCԲͬʹ÷֧DACAOCṩ200Gת450G200Gת2100G DACAOCƷΪṩĽ

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