M8091BSCA Receiver Conformance Test Application for IEEE802.3bs/cd

Introduction

Keysight M8091BSCA is a new conformance receiver test solution for 50G serial that provides wider standard coverage such as chip-to-chip (C2C) and backplane (KR) interfaces.

Keys Features

• Supported standards include the following:

o IEEE 802.3bs 200GAUI-4 & 400GAUI-8 Chip-to-Module (C2M) Annex 120E 

- 120E.3.3.2 Host Stressed Input Test

- 120E.3.4.1 Module Stressed Input Test

o IEEE 802.3bs 200GAUI-4 & 400GAUI-8 Chip-to-Chip (C2C) Annex 120D

- 120D.3.2.1 Receiver Interference Tolerance

- 120D.3.2.2 Receiver Jitter Tolerance

o IEEE 802.3cd 50GBASE-KR, 100GBASE-KR2, 200GBASE-KR4 Backplane (KR) Clause 137.9.31 

- 120D.3.2.1 Receiver Interference Tolerance

- 120D.3.2.2 Receiver Jitter Tolerance

• Guided setup, automated stress signal calibration and conformance measurement

• HTML test report

• Choose between Node-locked, Transportable, Network, USB-dongle license types of the Perpetual license term

Description

The M8091BSCA electrical receiver conformance test application is designed to assist and simplify the input test for 200GAUI-4 and 400GAUI-8 PAM4 capable host, module, and backplane interfaces. It reduces user interaction to a minimum and performs all required calibration routines and conformance testing automatically by remote controlling all required instruments.

The test application utilizes the same framework for the graphical user interface like most of Keysight transmitter test applications reducing training time by providing a common look and feel. When a user is required to perform setup changes, the user is guided by diagrams as well as text to minimize errors.

The respective clauses and annexes of the IEEE 802.3 specification which were added during the IEEE 802.3 bs project for 200GbE and 400GbE define the stress signal through a mated host compliance board (HCB) and module compliance board (MCB) connection. Both the receiver side as well as the transmitter side do have equalization capabilities. The definition of the stress signal assumes an optimized link. Therefore, the transmitter of the receiver test equipment as well as the receiver of the signal measurement device must be optimized for the given stress channel. This must be done iteratively for each test setup. The standard requires the transmitter equalization (TxEQ) to be kept as small as possible to increase the stress on the device under test’s receiver (DUT RX). This process is very time consuming. The M8091BSCA receiver test application performs this task automatically

Results of the individual calibration steps and tests are presented in tabular form as well as graphical form where appropriate. Calibrations and test results can be stored in projects and recalled at a later point in time. The application can also generate an HTML based test report.

Calibrations and Tests Covered by M8091BSCA Conformance Receiver Test Application 

All calibration steps are automated. The test application prompts the user when user interaction is required for connecting the test setup. Detailed connection diagrams and instructions are provided by the test application when each calibration or test is selected.

• 200GAUI-4 & 400GAUI-8 Chip to Module (C2M)

o Calibrations are implemented according to IEEE 802.3bs Annex 120E 

o Victim lane amplitude o Victim lane JRMS

o Victim lane SJ

o Crosstalk amplitude and transition time2

o Stressed eye

• Test is implemented according to IEEE 802.3bs Annex 120E

o Stressed input

• 200GAUI-4 & 400GAUI-8 Chip to Chip (C2C)

o Calibrations are implemented according to IEEE 802.3bs Annex 120D:

- Amplitude

- SJ

- RJ

- Broadband Noise 

- Receiver Interference Tolerance

- Receiver Jitter Tolerance

o Tests are implemented according to IEEE 802.3bs Annex 120D:

- Receiver Interference Tolerance

- Receiver Jitter Tolerance