Oscilloscope KnowledgeBase

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The PCI Express (PCIe) serial communication standard supports up to 16 lanes of full-duplex data transfer. The standard requires receivers to tolerate some lane-to-lane skew, but exceeding this limit can be detrimental to the link stability and performance. This document describes how to accurately measure the lane-to-lane skew across PCIe transmitters with a maximum data rate of 32 GT/s (Gen5). The procedure can be easily adapted to support the measurement at lower data rates. In part one we show how to deskew the measurement system (real time oscilloscope); part two describes how to configure the device under test (DUT) and perform an accurate lane-to-lane skew measurement.
Application: High Speed Digital, Serial Data
Author: Tektronix
External Link to complete AppNote/Whitepaper:
Published: 12-01-2023
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