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Jitter_Measurements_in_PCI_Express_Base_Specification
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Jitter_Measurements--- PCI SIG PPT
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Copyright © 2017 PCI-SIG
®
- All Rights Reserved
Jitter Measurements in the 0.7 4.0 PCI Express
®
Base
Specification
Savitha Muthanna
Software Design Engineer
Tektronix
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Copyright © 2017 PCI-SIG
®
- All Rights ReservedPCI-SIG Developers Conference 2017
Disclaimer
2
Presentation Disclaimer: All opinions, judgments, recommendations,
etc. that are presented herein are the opinions of the presenter of the
material and do not necessarily reflect the opinions of the PCI-SIG
®
.
The information in this presentation refers to specifications still in the
development process. Material is subject to change before the
specifications are released.
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Copyright © 2017 PCI-SIG
®
- All Rights ReservedPCI-SIG Developers Conference 2017
Agenda
o Introduction
o New, 2.5GT/s and 5GT/s Jitter Measurements
o Reference Clock Jitter Measurements
o Conclusion
o References
3
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Copyright © 2017 PCI-SIG
®
- All Rights ReservedPCI-SIG Developers Conference 2017
Jitter - Introduction
o Jitter is formally defined as short-term
variations of the significant instants of a digital
signal from their ideal positions in time.
4
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Copyright © 2017 PCI-SIG
®
- All Rights ReservedPCI-SIG Developers Conference 2017
Jitter Components in the PCI
™
Spec
o Data-dependent jitter
• Package loss, reflection
• Non-budgeted, and recoverable
o Uncorrelated jitter
• PLL jitter, power supply noise, and crosstalk
• Budgeted and non-recoverable
• Divisible into Total Jitter(TJ) and Deterministic Jitter(DJ)
5
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