100GBASE-KR4 Compliance Kit

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

100GBASE-KR is a 100 Gb/s data rate baseband specification, with a backplane medium, using a 64B/66B coding scheme, in a four-lane configuration. 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 many factors, including insertion loss, return loss, and cross-coupling. The transmitter and receiver equalization and package models are also taken into account.

This kit is designed for analysis of a 25.78 Gb/s channel based on 802.3bj compliance. The kit provides a test environment for designing and analyzing channels and their performance prior to COM testing. You can also run COM on channel designs. The kit implements most of the characteristics and parameters for transmitters, receivers and channels outlined in Section 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");

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 that is attached to this example as a supporting file.

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.