the Ultimate 10 Gb/s Solution

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XFP MSA – SONET Jitter Issues Finisar ■ Specifying Host and Module Properties to Meet SONET Jitter a Major Concern ■ Largest Issue is Transmitter Jitter Generation: �� Main Approach: Host and Module Share Jitter Generation Requirements Host Meets Low Frequency Jitter Gen. Spec < 60 mUIp-p for 50 kHz – 4 MHz XFP Filters High Frequency Jitter, < 60 mUI Gen. from 50 kHz – 80 MHz Ability of Host to Meet Spec is Controversial �� Alternate Approach: Module May Use Clock Multipler Unit (CMU) on TX Path Replaces Host Jitter Gen. with Need for Tight Control of Clock Spectrum ■ Jitter Peaking Probably not Hard to Meet But Hard to Measure. ■ O<strong>the</strong>r Questions on Jitter Tolerance Complex When Divided between Host and Module Lew Aronson October 17, 2002
XFP MSA – EMI Considerations ■ Minimizing EMI in Specifications �� XFI Swing is Relatively Small (350 mV S.E. Max) �� LimitsonRisetime(>24ps20–80%) �� Transmit Preemphasis Not Allowed by Eye Mask ■ Cage Design Finisar �� Early Cage Design Simulations Showed Significant Leakage into Host Chassis �� New Design Proposed and Simulated Showed 20 – 30 dB Improvement ■ Remaining Issues �� Determine EMI from Stripline on Host Board with Worst Case XFI Signals �� Industry Standards on Test Patterns and Associated Spectrum Lew Aronson October 17, 2002
Page 1 and 2: Finisar XFP The Ultimate 10Gb/s Sol
Page 3 and 4: Fiberoptic Transceivers and Transpo
Page 5 and 6: Fiber Optic Link Standards ■ Ethe
Page 7 and 8: Evolution of 1G Systems GLM Solutio
Page 9 and 10: Motivation for 10G Serial Interface
Page 11 and 12: XFP Multisource Agreement (MSA) Fin
Page 13 and 14: XFP MSA - Present Mechanical Design
Page 15 and 16: Form Factor Comparison XENPAK XFP 3
Page 17 and 18: XFP Pinout ■ Uses 30-pin Version
Page 19: XFI Interconnect Signal Integrity
Page 23 and 24: EMI Simulation Measurement Points F
Page 25 and 26: Finisar Recent XFP Results Finisar
Page 27 and 28: RX Electrical Output Eye from XFP L
Page 29 and 30: First Generation Reference Board Fi
Page 31 and 32: Ansoft Reference Via Design Finisar
Page 33 and 34: SMA - XFP Connector Section SMAs 62
Page 35 and 36: TDR Measurement- SMA and Vias SMA V
Page 37 and 38: Internal 2^31 PRBS Generation XBI M
Page 39 and 40: Finisar Ref Board SONET Jitter Meas
Page 41 and 42: Summary of XFP Advantages ■ Small

the Ultimate 10 Gb/s Solution

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