Test platforms for automotive Ethernet receiver validation

Automotive Ethernet validation is becoming central to vehicle electronics development as data rates increase and zonal architectures reshape in-vehicle network design. In this context, Keysight Technologies introduced new test solutions for validating automotive Ethernet receivers across multiple data rates and physical layers.

Automotive Ethernet validation in software-defined vehicle architectures
The transition toward software-defined vehicles and zonal electrical/electronic (E/E) architectures is increasing the need for deterministic communication and validated physical-layer performance within the automotive data ecosystem. Automotive Ethernet is increasingly used to support higher data throughput, network scalability and fault-tolerant communication between distributed vehicle controllers.

Receiver (Rx) conformance testing plays a role in verifying signal integrity, bit error rate (BER) performance and electromagnetic interference (EMI) resilience in these networks, particularly as automotive platforms move toward higher bandwidth backbones and edge computing architectures.

Keysight’s new test platforms were developed to support receiver validation from 10BASE-T1S to 10GBASE-T1 automotive Ethernet implementations.

Receiver conformance testing for multi-drop network topologies
One of the solutions focuses on 10BASE-T1S receiver validation for multi-drop network configurations used in zonal controller and edge node architectures.

Developed together with BitifEye Digital Test Solutions GmbH, the solution includes automated software for receiver conformance testing aligned with the Open Alliance TC14 PMA Test Suite 5.2.1 PHY compliance requirements. The platform supports BER verification under degraded channel conditions and coupled noise environments using dedicated hardware including a 10BASE-T1S media converter, ringing board and MDI adapter.

Multi-drop network test functions allow validation of node behavior within shared communication channels, supporting verification of scalable zonal network designs increasingly used in automotive digital supply chain development.

Optical Ethernet testing for higher bandwidth vehicle backbones
A second solution addresses optical automotive Ethernet through the nGBASE-AU test platform, which targets higher bandwidth communication and longer transmission distances in vehicle backbone networks.

The optical physical layer testbed supports compliance testing aligned with IEEE 802.3cz Amendment 7 (2023) and Open Alliance TC7 test specifications. Signal quality assessment is supported through TDFOM (Transmitter Dispersion and Eye Closure for Optical Measurements) metrics, including optical modulation amplitude (OMA), extinction ratio (ER), average optical power (AOP) and optical amplitude ratio (OAR).

Supported measurement hardware includes Keysight DCA-M oscilloscopes (models N1092A and N1092C) with clock recovery provided through the Keysight N1077B. Test automation is supported through the FlexDCA software platform, enabling both standards-based compliance testing and development-phase validation workflows.

Test coverage expands with increasing in-vehicle data requirements
The introduction of the 10BASE-T1S receiver test portfolio and the nGBASE-AU optical validation platform reflects growing test requirements as vehicle networks become more software-driven and data-intensive. The solutions focus on enabling standards-compliant receiver validation to support reliable communication performance in next-generation automotive network platforms.

Edited by industrial journalist Aishwarya Mambet, with AI-assistance.

www.keysight.com