100GBASE-KR4 Compliance Kit

R2026b
Open Live Script

Characterize and validate the performance of a 100GBASE-KR4 channel design.

100GBASE-KR4 is a 100 Gb/s data rate baseband backplane specification using four lanes operating at 25.78125 Gb/s per lane, with 64B/66B line encoding scheme. The IEEE 802.3bj specification Annex 93A defines methods for compliance of electrical channels operating at 25.78 Gb/s. Compliance of a channel to this specification is determined by its channel operating margin (COM). The COM calculation that is defined in the specification is based on insertion loss, return loss, cross-coupling, transmitter and receiver equalization and package effects.

This kit is designed for analysis of a 25.78125 Gb/s backplane channels compliant with 802.3bj. The kit provides a test environment for designing and analyzing channels and their performance prior to COM testing. The kit also supports COM analysis of inserted channel designs. The kit implements most of the characteristics and parameters for transmitters, receivers and channels outlined in Clause 93 of 802.3bj-2014.pdf.

The interface contains five schematic sheets. One sheet is used to test channel characteristics such as insertion loss and return loss. Also included are individual sheets for testing transmitter and receiver characteristics. Lastly, two sheets are used for statistical and time domain analysis on single and coupled channels. TX and RX IBIS-AMI models are provided that implement the equalization requirements of COM. Package models were created from transmission lines and package-to-board capacitance to represent lengths of 12 mm and 30 mm.

Open 100GBASE-KR4 Kit

Open the 100GBASE-KR4 kit in the Serial Link Designer app using the openSignalIntegrityKit function.

openSignalIntegrityKit("100GBASE_KR");

100GBASE_KR.PNG

Kit Overview

  • Project Name: 100GBASE_KR

  • Interface Name: 100GBASE_KR

  • Target Operating Frequency: 25.78 Gb/s (UI = 38.79 ps)

This kit defines one schematic set.

  • 100GBASE_KR – Network_Characteristics, Single_Channel and Multi_Channel

For more information about the 100GBASE-KR4 channel compliance schematics, transfer net properties, and compliance rules, refer to the document 100GBASE_KR4.pdf located inside the kit project directory.

References

[1] IEEE Standard for Ethernet, Amendment 2: Physical Layer specifications and Management Parameters for 100Gb/s Operation Over Backplanes and Copper cables. 802.3bj-2014.pdf.

See Also