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Automotive Ethernet MultiGBASE-T1, 1000BASE-T1 and 100BASE-T1 Compliance

DPO70000SX/DX AUTOEN10G and BRR Option Datasheet

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The Tektronix Option AUTOEN10G (MultiGBASE-T1) and BRR (100BASE-T1/1000BASE-T1) applications provide the most comprehensive solution for Automotive Ethernet transmitter compliance testing as well as debug and validation of Automotive Ethernet devices and ECUs against the IEEE and Open Alliance specifications. These options are available on MSO/DPO70000DX and DPO70000SX Series oscilloscopes.

Features and Benefits

Test coverage: All transmitter compliance tests for 100BASE-T1 (IEEE 802.3bw), 1000BASE-T1 (IEEE 802.3bp) and MultiGBASE-T1 (IEEE 802.3ch) are available through a single Automotive Ethernet compliance application. The application uses the TekExpress automation framework and tests as per IEEE and Open Alliance specification for Tektronix DPO70000 SX/DX oscilloscopes.

Test time: Fully automated with setup wizard, configures all required test parameters to perform compliance testing as per Automotive Ethernet standards. Highly optimized and intuitive user interface for quick test configuration and validation of electrical signals.

Accuracy: The application runs on Tektronix DPO70000 SX/DX Series oscilloscopes for accurate and repeatable results.

Pattern matching: Verifies that the correct set of compliance patterns are sent by the transmitter before acquiring signals for compliance analysis.

Reporting: Compiles all test results into a customizable report with Pass/Fail results for easy analysis and record keeping, as well as margin testing.

Compliance and debug: Provides a toolkit of DPOJET-based setups to quickly switch into debug and validation mode when a DUT fails compliance.

Analysis and debug tools: Supporting tools, such as TekExpress User defined Mode, advanced DPOJET jitter analysis (Otp. DJA), PAM4 Eye Diagram Analysis (Opt PAM4) tools help to catch problems before compliance testing, or root-cause the problem in the event of a failure.

Performance verification: The Automotive Ethernet application allows you to run a test multiple times and save or stop acquisitions in the event of an out-of-limit condition. The report shows statistics with pass/fail results for each run to show device performance over multiple runs.

PHY level protocol decode: SR-AUTOETH1 option decodes and displays the 100BASE-T1 data in a protocol-aware view. A time-correlated event table view with waveforms allows for quickly searching through events of interest.

Comprehensive programmatic interface: Enables automation programs and scripts to call Automotive Ethernet test functions.

Automated Automotive Ethernet compliance application

Physical layer compliance tests have been defined to ensure interoperability between different designs and hardware vendors. Tektronix Automotive Ethernet compliance testing application provides the most comprehensive solution to serve the needs of engineers designing Automotive Ethernet silicon or electronic control units (ECUs), as well as those validating physical layer compliance of Automotive Ethernet as per IEEE or Open Alliance specifications.

10BASE-T1S100BASE-T11000BASE-T1SMultiGBASE-T1
IEE Spec802.3cg802.3bw802.3bp802.3ch
Open Alliance ECU SpecTC8
Datarate10 Mbps100 Mbps1 Gbps2.5/5/10 Gbps
Symbol rate12.5 MHz66.66 MHz750 MHz1.4/2.8/5.6 GHz
Line coding4B/5B, DMEPAM3PAM3PAM4
Voltage1 Vpp2.2 Vpp1.3 Vpp1.3 Vpp
CommunicationHalf DuplexFull DuplexFull DuplexFull Duplex

Industry defined testing for Automotive Ethernet

The IEEE and Open Alliance provide compliance tests for an Automotive Ethernet PHY or ECU. As per the IEEE and Open Alliance, we have the following compliance requirements for Physical Media Attachment (PMA) transmitter test for an Automotive Ethernet PHY or ECU.

Test Name100BASE-T1 IEEE 802.3 bwECU TC8 100/1000BASE-T11000BASE-T1 IEEE 802.3 bp MultiGBASE-T1 IEEE 802.3 ch
Transmitter output Droop96.5.4.1OABR_PMA_TX_0197.5.3.1149.5.2.1
Transmitter Distortion 96.5.4.2OABR_PMA_TX_0897.5.3.2NA
Transmitter LinearityNANANA149.5.2.2
Transmitter Timing Jitter in Master/Slave Mode96.5.4.3OABR_PMA_TX_0297.5.3.3149.5.2.3
Transmitter MDI JitterNANA97.5.3.3NA
Tx MDI Random Jitter (Master)NANANA149.5.2.3.1
Tx MDI Deterministic Jitter (Master)NANANA149.5.2.3.2
Transmitter Power Spectral Density (PSD)96.5.4.4OABR_PMA_TX_0497.5.3.4149.5.2.4
Transmit Clock Frequency96.5.6OABR_PMA_TX_0397.5.3.6149.5.2.6
Transmitter Peak Differential Output96.5.4.5NA97.5.3.5149.5.2.5
MDI Return Loss96.8.2.1OABR_PMA_TX_0597.7.2.1149.8.2.1
MDI Mode ConversionNAOABR_PMA_TX_06NANA
Common Mode EmissionNAOnly 100BASE-T1NANA

Each test requires the engineer to set the required test mode, acquire waveforms with the correct instrument settings, and analyze the results per the standard. Manually capturing and analyzing them is tedious, time consuming, and subject to errors.

The TekExpress Automotive Ethernet compliance application allows you to automatically execute physical layer electrical tests for transmitter compliance using IEEE and/or Open Alliance (OABR) specifications. The Tektronix Option BRR and AUTOEN10G applications combine to form a TekExpressTM compliance automation solution for 100BASE-T1, 1000BASE-T1 and MultiGBASE-T1 Automotive Ethernet with a single user interface. The TekExpress Automotive Ethernet application is configured by following a step-by-step process. The application sets up the oscilloscope and automates testing, guiding you to accurate and repeatable results.

MultiGBASE-T1 PMA Transmitter Compliance Measurements

MultiGBASE-T1 is specified in IEEE 802.3ch, an extension to BASE-T1 PHYs at speeds in excess of 1000 Mb/s, including 2.5GBASE-T1, 5GBASE-T1, and 10GBASE-T1. The physical layer operates over a single pair of shielded cable in full-duplex mode with four level pulse amplitude modulation (PAM4).

MultiGBASE-T1 PMA Transmitter Measurements

Test SpecTest ModePattern TypeInstrument
Tx Output Droop6Oscilloscope
Tx Linearity4PAM4Oscilloscope
Tx Timing Jitter (Master and Slave)1ClockOscilloscope
Tx MDI Random Jitter (Master Mode)2SquareOscilloscope
Tx MDI Deterministic Jitter (Master Mode)2JP03AOscilloscope
Even Odd Jitter (EOJ)2JP03BOscilloscope
Tx Power Spectral Density and Power level5PAM4Oscilloscope
Tx Clock Frequency 1ClockOscilloscope
Tx Peak Differential Output5PAM4Oscilloscope
MDI Return LossSlaveVNA

1000BASE-T1 PMA Transmitter Measurements:

Test SpecTest ModePattern TypeInstrument
Tx Output Droop6Oscilloscope
Tx Distortion4PAM3Oscilloscope
Tx Timing Jitter (Master and Slave)1ClockOscilloscope
Tx MDI Jitter2ClockOscilloscope
Tx Power Spectral Density and Power level5PAM3Oscilloscope
Tx Clock Frequency 1ClockOscilloscope
Tx Peak Differential Output5PAM3Oscilloscope
MDI Return LossSlaveVector Network Analyzer or Oscilloscope + AWG
MDI Mode ConversionSlaveVNA

100BASE-T1 PMA Transmitter Measurements:

Test SpecTest ModePattern TypeInstrument
Tx Output Droop6Oscilloscope
Tx Distortion4PAM4Oscilloscope
Tx Timing Jitter (Master and Slave)1ClockOscilloscope
Tx Power Spectral Density and Power level5PAM3Oscilloscope
Tx Clock Frequency 2ClockOscilloscope
Tx Peak Differential Output5PAM3Oscilloscope
MDI Return LossSlaveVNA
MDI Mode Conversion SlaveVNA
MDI Common Mode Emission5PAM3Oscilloscope

The TekExpress Automotive Ethernet Automated Testing Application

The Tektronix Automotive Ethernet application offers exceptional ease of use with the TekExpress Automation platform. Testing follows a logical workflow for quick, easy test setups, changes and review of test results. Valid testing requires proper cabling, probes, and connections between fixtures, instruments, and the device under test (DUT). The application provides setup instructions for each test, with images and reference illustrations showing correct configurations. It generates a comprehensive, date-stamped test report with pass/fail results, waveforms, and data plots.

Accurate, repeatable compliance tests follow a 5-step workflow.

Step 1: Selection of Test Suite

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Automotive Ethernet Test suit selection

Test selections include Automotive Ethernet 100BASE-T1, 1000BASE-T1 and MultiGBASE-T1. You can select different speed gears for MultiGBASE-T1. The test selection, test limits and configuration will be selected based on the test suite selected. You can test using live oscilloscope waveforms or previously recorded waveforms or sessions.

Step 2: Test Selection

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Automotive Ethernet MultiGBASE-T1 Test selection

Based on the test suite selection in Step 1, the TekExpress Automotive Ethernet application allows you to select one or multiple tests from the test tree for the respective test suite.

Schematic views and descriptions guide you through connections, along with test information and golden waveforms. If you select multiple tests, the application will provide prompts to set the correct DUT test mode and make the appropriate connections.

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Automotive Ethernet 1000BASE-T1 Test selection
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Schematic view

Step 3: Selection Acquisition and Signal Validation

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Signal Acquisition and Validation

It is important to validate the signal parameters before performing compliance test. The TekExpress application checks for the correct test mode waveform before running any test. This ensures that the proper test connections are in place and that the DUT is sending the appropriate test pattern.

Step 4: Configuration of User-defined and Compliance Mode

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User defined configuration for PSD test

The application allows you to configure the test in Compliance Mode or User-defined Mode. In Compliance Mode, the application configures the oscilloscope per the test procedure defined in the test specifications from the applicable standard. The DUT is tested against limits defined by the standard.

In User-defined Mode, you can change the oscilloscope parameters such as record length, sample rate, etc., as well as test limits. User-defined Mode allows you to test your device beyond compliance.

Step 5: Preferences

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Multi-run Configuration for Statistical Analysis

The testing application allows you to run multiple consecutive tests for statistical analysis. You can save the waveforms from failed tests for debugging.

Pass/Fail Report:

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TekExpress Report for MultiGBASE-T1

Creating compliance test documentation is quick and easy in the BRR/AUTOEN10G application with a summary report in MHL or PDF format. The application generates a report after tests are completed, and includes Pass/Fail status to quickly analyze the test results. The report also includes test configuration details, waveform plots, oscilloscope displays, margin analysis, and statistical analysis to provide insights into your design.

Single Instrument for Time Domain and Frequency Domain Measurements

Automotive Ethernet compliance testing includes time domain measurements like Jitter, Droop, Clock Frequency and Peak Differential Output. It also includes frequency domain measurements such as Power Spectral Density and Return Loss. The Tektronix Automotive Ethernet application allows you to perform all of these measurements using an oscilloscope, eliminating the need to connect a spectrum analyzer or vector network analyzer.

Return Loss Measurement

The MDI return loss test determines the impedance mismatch from the differential impedance specification of 100 Ω, which will affect hardware interoperability. Return loss is a frequency domain measurement, but the Automotive Ethernet application can perform this test with an oscilloscope and function generator using a patented measurement approach that eliminates the need for additional frequency domain test instruments.

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Tektronix Patented Return Loss Measurement using Oscilloscope and AWG for 100/1000BASE-T1

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Return Loss plot using Oscilloscope and AWG method

Power Spectral Density

The spectrum of the test signal for the selected standard is computed using oscilloscope math functions. Post processing is done on the signal to arrive at the PSD. The computed PSD is then compared with the specification by using lower and upper masks to arrive at the final result.

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Power Sprectral Density Plot

Analysis and Debug Beyond Compliance

If a DUT fails any portion of the compliance test, powerful debugging and analysis tools such as DPOJET Jitter Analysis, PAM4 Analysis, and protocol decoding are available to determine root cause and examine system-level performance.

DPOJET Jitter Analysis Measurements (required, Option DJA)

The new jitter measurements introduced with MultiGBASE-T1 Ethernet provide separate limits for Deterministic Jitter (DJ), Even Odd Jitter (EOJ) and Random jitter (Rj). The DPOJET Jitter Analysis tool provides additional analysis capabilities like crosstalk and power noise separation to help find the root cause of failures.

Jitter tests quantify the timing variations of the edges of the signal, using specified test patterns. These jitter measurements include the contributions from duty cycle distortion and baseline wander. Jitter is determined by accumulating waveforms and measuring the width of the accumulated points at the eye crossing. The peak-to-peak jitter is inferred from minimum and maximum values in the tails of the histogram.

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PAM3 Eye diagram using DPOJET

Apart from jitter measurements for MultiGBASE-T1, DPOJET allows you to perform analysis for following measurements:

  • Clock frequency and transmitter amplitude with histogram and trend analysis
  • Positive and negative droop measurements
  • Full characterization of jitter performance including TIE and histogram profiles.
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Jitter measurement and Analysis using DPOJET

PAM4 Analysis (Option PAM4)

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PAM4 Analysis

Automotive MultiGBASE-T1 uses four-level Pulse Amplitude Modulation (PAM4) for physical layer transmission since PAM4 signaling needs half the bandwidth as NRZ for the same data rate. However the 4 levels of PAM4 introduce additional complexity in signaling and place new demands on the test methodology. The PAM4 analysis tool offers several measurement and visualization capabilities to make validating PAM4 designs significantly more efficient.

PAM4 Analysis

  • Enhanced software clock recovery offers the industry's most robust clock recovery capability even from heavily impaired signals.
  • Integrated receiver equalization: Apply CTLE, FFE and DFE equalization to the acquired waveform to open a closed eye. Model different types of receiver settings to perform what-if analysis.
  • Configurable Bessel-Thomson filter offers the flexibility to tune bandwidth of the measurement receiver, either manually or automatically, based on detected data rate.
  • Waveform filter enables embed or de-embed test fixtures or channel models.

PAM4 Measurements

  • Jitter measurement and eye analysis: Full Characterization of the PAM4 eyes to support standard based and debug analysis.
  • Rise and fall times for all 12 PAM4 transitions offer the capability to analyze each transition type in the PAM4 signal.
  • Symbol and bit error detector: Accumulate SER and BER over multiple acquisition cycles.

Plots and reports

  • Comprehensive plots enable in-depth analysis. HTML report captures all the relevant setup configuration, measurement test results, and plot in single file that is easy to read and share. Measurement results across multiple acquisitions can be exported to a consolidated CSV file for easy multi-run analysis.

Automotive Ethernet Decoder for 100BASE-T1 (Option SR-AUTOETH1)

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100BASE-T1 Protocol decode

Decode and display Automotive Ethernet data in a protocol-aware view with the characters and names that are familiar from the standard such as the ordered sets: SOF, Electrical Idle, and EOF.

User can now feed the output of directional coupler to Tektronix Oscilloscope for time domain view. SR-AUTOETH1 100BASE-T1 protocol decode software runs on DPO70000SX and MSO/DPO70000 Series oscilloscopes and easily decodes PAM3-encoded 100BASET1 signal. This enables engineers to quickly understand the protocol activity between the ECUs. A time-correlated event table view with waveform allows for quickly searching through events of interest simultaneously.

Key Feautures

  • Decodes PAM3 encoded 100BASE-T1 signals.
  • Decodes Send_N mode packets without any training sequence.
  • Validate FCS and reports error packets in red color.
  • Display the time stamp, packet type, IP source and destination address, decoding of the payload.
  • Detail view correlates the decoded packets with waveform using a bus diagram.
  • Separately display Master and Slave packets.
  • Export the decoded data in CSV or TXT file format.
  • Report generation.

Ordering Information

StandardCompliance TestInstrument Model number
Multigigabit Ethernet Droop, Linearity, Dj and Rj Jitter, Power Spectral Density, Clock frequency, Peak Differential outputOscilloscope with min bandwidth of;

4GHz bandwidth for 2.5Gbps,

8GHz bandwidth for 5Gbps,

13GHz bandwidth for 10Gbps

DPO70000 SX/DX series
MDI Return LossVector Network Analyzer with min 4GHz 3rd Party VNA
1000BASE-T1Droop, Jitter, Power Spectral Density, Clock frequency, Peak Differential outputOscilloscope with min 2 GHz bandwidth

DPO70000 C/SX/DX series, MSO5/6B series

Distortion Test2 channel Function generators with min bandwidth of 125 MHzAFG31000 series or AWG5200
MDI Return LossAWG or Vector Network Analyzer AWG5200 with Oscilloscope or 3rd Party VNA
MDI Mode conversionVector Network Analyzer 3rd Party VNA
100BASE-T1Droop, Jitter, Power Spectral Density, Clock frequency, Peak Differential output, Common mode emissionOscilloscope with min 1 GHz bandwidthDPO70000 C/SX/DX series, MSO5/6B series
Distortion Test2 channel Function generators with min bandwidth of 25 MHzAFG31000 series
MDI Return lossAFG(125 MHz) or Vector Network Analyzer AFG with Oscilloscope or 3rd Party VNA
MDI Mode conversionVector Network Analyzer 3rd Party VNA

Software option

StandardCompliance TestOptionDescription
MultiGBASE-T1802.3ch Transmitter ComplianceAUTOEN10GTekExpress Automotive Ethernet -MultiGBASE-T1 Compliance Solution(Requires Opt. DJA)
DPO-UP AUTOEN10GTekExpress Automotive Ethernet -MultiGBASE-T1 Compliance Solution(Requires Opt. DJA); Upgrade
DPOFL-AUTOEN10GTekExpress Automotive Ethernet -MultiGBASE-T1 Compliance Solution(Requires Opt. DJA); Floating
100/1000BASE-T1IEEE and Open Alliance PMATransmitter complianceBRRTekExpress Automotive Ethernet Compliance
DPO-UP BRRTekExpress Automotive Ethernet Compliance; Upgrade
DPOFL-BRRTekExpress Automotive Ethernet Compliance; Floating
100BASE-T1Protocol decodeSR-AUTOETH1Automotive Ethernet 100BASE-T1 Protocol decode

Pre-requisite Software

StandardOptionDescription
MultiGBASE-T1DJAAdvance Jitter Analysis (Order preinstalled on a new oscilloscope)

Optional Software

StandardOptionDescription
MultiGBASE-T1 PAM4PAM4 Transmitter Analysis
Low Speed Protocol decodeSR-AUTOCAN, LIN, FlexRay serial bus trigger and decode

MDI Return Loss with AWG/AFG Method

StandardModel NumberDescription
1000BASE-T1AWG5202 with opt 250, 2 HV Tektronix AWG5200 with high amplitude DC coupled with output option
TDP3500 (2 nos)3.5 GHz Differential Probe with TekVPI™ Probe Interface s (require TCA-VPI50 adapter)
100BASE-T1AFG311521 μHz to 150 MHz sine wave, 2-channel arbitrary function generator
TDP1500 (2 nos)1.5 GHz Differential Probe with TekVPI™ Probe Interface s (require TCA-VPI50 adapter)

Probe

StandardModel NumberDescription
MultiGBASE-T1 (Optional)P7700 series TriMode probe with TekFlex connector technology
P77C292MMSMA Coaxial adapter with TekFlex connector technology, 20 GHz
TDP35003.5 GHz Differential Probe with TekVPI™ Probe Interface s (require TCA-VPI50 adapter), for clock measurement
1000BASE-T1TDP35003.5 GHz Differential Probe with TekVPI™ Probe Interfaces (require TCA-VPI50 adapter)
100BASE-T1TDP15001.5 GHz Differential Probe with TekVPI™ Probe Interfaces (require TCA-VPI50 adapter)

Accessory

StandardAccessoryPart numberUse case
MultiGBASE-T1Multigigabit Ethernet FixturePCB S3401 SB 39637331PMA Tx Compliance Measurement
MultiGBASE-T1Matched Pair SMA cablePMA Tx Compliance Measurement
100/1000BASE-T1FixtureTF-XGBTPMA Tx Compliance Measurement
100/1000BASE-T1Clock Divider unitTF-BRR-CFDDistortion test
100/1000BASE-T1Fixture

02K3E6 K00S3 3873901

02K3E6 S00S3 3873911

02S3E6 S00S3 3873921

02S3E6 K00S3 3873931

Mode conversion and Return loss fixture with Rosenberger H-MTD connector
100BASE-T1Directional CouplerDCDP for H-MTD1Protocol decode fixture with Rosenberger H-MTD connector
100BASE-T1Power splitterMini circuit Z99SC-621Common Mode emission test
100/1000BASE-T1Two pairs of 50 Ω high-quality SMA or coaxial cables AFG or AWG signal sources (AFG based Return loss)
100/1000BASE-T1One 50 Ω high-quality coaxial cableAFG or AWG signal source, for marker output (AFG based Return loss)
100/1000BASE-T1Two 50 Ω high-quality coaxial cablesclock divider Input (distortion test)
100/1000BASE-T1One 50 Ω high-quality SMA cableclock divider Input (distortion test)

13rd Party items