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M809256PB OIF-CEI CEI-56G PAM4 Pre-Compliance Receiver Test Application

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Table of Contents

Key Features ................................................................................................................................................... 3

Description ...................................................................................................................................................... 3

Calibrations and Tests Covered by M809256PB Pre-Compliance Receiver Test .............................................. 5

Application CEI-56G-VSR (host or module)...................................................................................................... 5

Example setup for VSR Host input stress eye calibration ................................................................................. 5

OIF CEI-56G-MR/-LR PAM4 ............................................................................................................................ 6

Setup for MR Receiver Interference and Jitter Tolerance Test.......................................................................... 6

Configuration Guide ......................................................................................................................................... 7

Minimum required instrument configuration ...................................................................................................... 8

Remote Programming.................................................................................................................................... 11

Data Analytics Enabled .................................................................................................................................. 11

Related Products ........................................................................................................................................... 11

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Key Features • CEI-56G-VSR PAM4 (host and module), CEI-56G-MR and -LR PAM4 from 18 to 29 Gbaud • Guided setup, automated stress signal calibration and pre-compliance measurement • HTML test report • Data Analytics Enabled • Choose between node-locked, transportable, network, USB-dongle license types either

perpetual or time-based with 6/12/24 month duration

Description The M809256PB receiver test application is designed to assist and simplify the stress signal calibration used for testing the inputs of CEI-56G-VSR/-MR/-LR PAM4 electrical interfaces using a Keysight M8040A 64Gbaud Higher Performance BERT and a Keysight Digital Communication Analyzer (DCA) Oscilloscope. It reduces user interaction to a minimum and performs all required calibration routines and compliance testing automatically by remote controlling all required instruments. A wide range of hardware configuration is supported, thus protecting your investment.

Figure 1. Graphical User Interface of the M809256PB CEI-56G PAM4 Pre-Compliance Receiver Test Application

The test application utilizes the same frame work 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. 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 generate an HTML based test report.

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Figure 2. Connection diagram for 56G-VSR Host receiver stress test

Figure 3. Results of the stress eye calibration procedure for 56G-VSR Host

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Calibrations and Tests Covered by M809256PB Pre-Compliance Receiver Test Application CEI-56G-VSR (host or module) OIF CEI-56G-VSR PAM4 defines 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 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). If performed manually, this procedure is very time consuming. However, the M809256PB Receiver test application performs this task automatically.

Example setup for VSR Host input stress eye calibration • MCB and HCB • X-Talk Generator Data Out 2 P/N to TPI P/N of MCB • Termination via 50 Ohm to TPIaP/N of HCB • Victim Generator Data Out 1 P/N to TP4aP/N of HCB • Oscilloscope CVH1/CH2 to TP4 P/N of MCB

Figure 4. Setup configuration for VSR stress eye calibration (Host test)

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

• OIF CEI-56G-VSR host and module o Calibrations are implemented according to OIF-CEI-4.0 Common Electrical I/O (CEI) -

Electrical and Jitter Interoperability Agreements, December 29, 2017 Crosstalk amplitude and transition time Victim lane amplitude Victim lane UUGJ Victim lane SJ Stressed eye

o Test is implemented according to IEEE Standard for Ethernet, Annex 120E Stressed input Voltage tolerance

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OIF CEI-56G-MR/-LR PAM4 Both 56G-LR and -MR test procedures rely on the Channel Operating Margin (COM) method1. COM has been first introduced to measure the performance margin of a channel and then extended to digital systems. Interoperability of digital receiver can be expressed in terms of COM requirements. COM is calculated out of channel 4-ports S-parameters (for victim and aggressor lanes) as well as the noise and equalization functionality of the considered transmitter and receiver. The resulting COM metric is the ratio of the signal amplitude (after equalization) to the noise and cross-talk peak-to-peak amplitude measure during a time interval depending on the target BER.

OIF CEI-56G-MR/-LR PAM4 receiver test calibration procedure consists of three steps2:

1. S-parameter measurements (only once per system) 2. System calibration: Calibrate the equipment used to generate the victim transmitter and the

broadband noise 3. COM-related calibration: Following steps are performed to complete the COM model

a) Check channel characteristics (S-parameters) b) Measured Tx characteristics (jitter & electrical characteristics)

Finally, the COM-model computes the amount of broadband noise to be injected in the noise path and the Rx test (BER measurement for different level of noise or jitter) can be performed.

Setup for MR Receiver Interference and Jitter Tolerance Test

• Set Device to Loopback. • Victim Generator Data Out 1 P/N to test point T P/N of ISI channel. • ISI channel test point T P/N to thru path of matched directional coupler pair. • Noise Generator Data Out 1 P/N to couple path of matched directional coupler pair. • Directional coupler Data Out P/N to Test point T P/N of Receiver test fixture. • Receiver test fixture Test point T P/N to Receiver under test. • Victim Analyzer Data In P/N to Test point of looped back signal P/N via Pick-Off. • Recovered Clock Out from Clock Recovery to Victim Analyzer Clk In. • Unused ports with 50 ohms.

1 IEEE S tandard f or E thernet, IEEE 802.3, Annex 93A .

2 For m ore detai ls on these standards, r ef er to O pt ic a l In ternetw ork ing Forum - C lauses 16, 17 and 21 of the O IF-C EI -04.0 Com m on E lec t ric a l I /O (C E I) - E lec t r ic a l

and J i tter Interoperabi l it y Agreem ents, D ec em ber 29, 2017.

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Figure 5. Setup configuration for -MR interference (left) and jitter (right) tolerance test

Configuration Guide Following table below shows the required equipment for each standard option under OIF CEI-56G. Required Instrument configuration and required software options are listed in the following section.

Equipment Type VSR MR/LR

Victim Pattern Generator M8045A

Crosstalk Generator M8045A 2nd channel or 3rd party Crosstalk Generator N/A

Interference Source N/A M8054A or M8195A or M8196A

Victim Error Detector M8046A / DCI (DUT Control Interface)

Clock Recovery M8046A - 0A4 (internal CDR) or N107xA / N1076B / N1077A /

N1078A

DCA-X N1000A + N1060A or 86100D + 86108B

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Minimum required instrument configuration Accessories are not listed. The options marked * are recommended but not mandatory. HCB/MCB are not offered by Keysight but are required for this application along with additional cables and accessories.

M8040A 64 Gbaud High-performance BERT

M8040A-BU2 Bundle consisting of one M9505A 5-slot AXIe Chassis plus control module with USB option

M8045A Pattern generator and clock module 32/64 Gbaud, 3 slot AXIe

• M8045A-G32 Pattern Generator one Channel NRZ, Data Rate up to 32 GBaud (requires Remote Head, e.g. M8057A)

• M8045A-0G3 Advanced Jitter Sources for Receiver Characterization, Module-wide License

• M8045A-0G4 De-emphasis, Module-wide License

• M8045A-0P3 PAM-4 Encoding up to 32 GBaud, Module-wide License

• M8057B-FG Remote Head for M8045A Pattern Generator, 1 Channel

• M8045A-0G2* Second Channel, Hardware and License (requires Remote Head, e.g. M8057B)

M8046A Analyzer module, 32/64 Gbaud, 1-slot AXIe

• M8046A-A32 Analyzer, one Channel, Data Rate up to 32 GBaud, NRZ

• M8046A-A04* Clock recovery for 32 Gbaud, license

• M8046A-0P3 PAM-4 Decoding up to 32 GBaud

• M8046A-802* Matched cable pairs, two matched cable pairs are required

• M8046A-801* Cable 2.92 mm (m) to 2.92 mm (m), 0.5 m for clock input, Qty 1

M8070B System software for M8000 Series of BER test solutions

M8070ADVB-1xx Advanced Measurement Package for M8000 Series of BERT Test Solutions (node-locked, transportable, floating or USB license

Choose on N107xx Clock Recovery if M8046A-A04 option not selected

N1076A/N1077A Electrical/optical Clock Recovery

• N107xA-232 Supported input rates: 50 MBd to 32 GBd

• N1076A-CR1 Clock Recovery Phase Matching Kit for N1076A Elec

• N1076A-2P2 Microwave Pick-Off Tee 2.4mm connectors, matched pair

• 11900B 2.4 mm female to 2.4 mm female adapter

• 83059A Coaxial Adapter, 3.5mm Male-Male

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N1076B/N1078A Electrical/optical Clock Recovery

• N107xx-232 Supported input rates: 125 MBd to 32 GBd

• N1076B-CR1 Clock Recovery Phase Matching Kit for N1076B Electrical

• N1027A-2P8 Microwave Pick-Off Tee 1.85 mm connectors, matched pair

• 11900B 2.4 mm female to 2.4 mm female adapter

• 83059A Coaxial Adapter, 3.5mm Male-Male

Select an interference source 56G-LR or -MR application

M8195A 65 GSa/s arbitrary waveform generator

• M8195A-001 Arbitrary Waveform Generator, 1 Channel, 65 GSa/s

M8196A 92 GSa/s arbitrary waveform generator

• M8196A-001 Arbitrary Waveform Generator, 1 Channel, 92 GSa/s

M8054A Interference Source 32 GHz

Select DCA Configuration – N1000A + N1060A or 86100D DCA-X + 86108B

N1000A DCA-X Wide-Bandwidth Oscilloscope Mainframe

• N1000A-PLK Pattern Lock Trigger Hardware Model

N1060A Precision Waveform Analyzer

• N1060A-050 Two 50 GHz channels

• N1060A-232 Supported input rates: 125 MBd to 32 GBd

• N1060A-PTB Precision Timebase, Ultra-Low Random Jitter

• N1060A-JSA Jitter Spectrum Analysis and Clock Recovery Emulation

86100D Infiniium DCA-X Oscilloscope mainframe (discontinued)

• 86100D-ETR Enhanced Trigger, 13 GHz BW, pattern and module trigger

86108B Precision Waveform Analyzer

• 86108B-HBW 50 GHz Bandwidth, 2 Channel Electrical

• 86108B-232 Supported input rates: 50 Mb/s to 32 Gb/s

• 86108B-300 Adjustable Loop Bandwidth for Clock Recovery

• 86108B-PTB Precision Timebase, Ultra-Low Random Jitter

• 86108B-JSA Jitter Spectrum Analysis and SW Clock Recovery Emulation

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FlexDCA N1000-Series System software – choose legacy DCA options or R&D package

N1010AT/86100D-200 Enhanced Jitter Analysis SW

N1010AT/86100D-201 Advanced Waveform analysis

N1010AT/86100D-9FP PAM-N analysis software

N1010AT/86100D-SIM InfiniiSim-DCA (embedding/de-embedding of cables or fixtures)

N1010100A Research and Development Package for FlexDCA DCA-X mainframe minimum configuration

Accessories

86108B-PT2 Two Phase Trimmers for external skew adjustment, 2.4 mm (optional)

86108B-CA2 Matched Cable Pair, 2.4mm - 2.4mm 24 inch (optional)

86108B-DC2 Two DC Block 2.4mm 16V 50KHz - 50 GHz (optional)

M8195A-810 Cable, 2.92 mm (m) to 2.92 mm (m), length 0.85 m (for combing SI and RI) (2 required, 3 if DCA-X)

M8195A-820 Coaxial termination 50 Ω DC to 26.5 GHz, 3.5 mm (male) (2 required)

M8049A-003* ISI Channel Board, Seven Traces from 9.1 to 22.3 inches

M8045A-802 Matched coupler pair, 50 GHz, 13 dB, 2.4 mm

M809256PB software configuration

M809256PB-1xx Pre-Compliance RX Test Automation license for OIF CEI-56G VSR/MR/LR (node-locked, transportable floating or USB license)

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Learn more at: www.keysight.com For more information on Keysight Technologies’ products, applications or services, please contact your local Keysight office. The complete list is available at: www.keysight.com/find/contactus

This information is subject to change without notice. © Keysight Technologies, 2019 - 2020, Published in USA, June 18, 2020, 5992-4334EN

Remote Programming The M809256PB IEEE 802.3bs Pre-Compliance Test Application is part of Keysight’s Digital Test Apps and can be programmed via ARSL, any .NET language or through the LabVIEW graphical programming interface. For more information, see www.keysight.com/find/rpi.

Data Analytics Enabled This test application supports data exporting with support from the Keysight KS6800A Data Analytics Software. For more information see http://www.keysight.com/find/data-analytics.

Related Products The N109256CB TX Test Automation SW Application for OIF-CEI 4.0 for the sampling oscilloscopes and the N6473A OIF-CEI 4.0 Compliance Application for Infinium real-time oscilloscopes offer automated transmitter testing for CEI-56G-VSR host or module, CEI-56G-MR and CEI-56G-LR outputs.

The N4917BSCB Optical Receiver Stress Test Application addresses test needs for optical input test of transceiver modules for IEEE 400GBASE-based optical interfaces.