BroadR-Reach PHY Compliance Test Solutions

 Simple and accurate evaluation and debug of BroadR-Reach physical layer

 To meet the demand for higher security in automobiles, a faster and more reliable in-vehicle network is required to improve vehicle control. In addition, simultaneous streaming of high quality video and sound, and the digitization of camera systems have increased network traffic for in-vehicle information systems.

Automotive Ethernet, which can cover both control and information systems, is gaining attention. The OPEN (One-pair Ethernet) Alliance SIG has developed an in-vehicle Ethernet specification, based on Broadcom’s BroadR-Reach technology.

Keysight provides the necessary equipment, including an oscilloscope and network analyzer, for BroadR-Reach PHY transmitter and link segment measurements.

 Transmitter Evaluation

Transmitter evaluation is performed on the DUT output signal. Test signals are defined by the standards for each test item. The N6467A BroadR-Reach compliance applica­tion software, which runs on the Keysight Technologies, Inc. 9000A/90000A series oscilloscope, automatically performs measurements of each test item, pass/fail judg­ment, and report generation. You can reduce evalua­tion time, because measurements are fast and objective regardless of the test operator.

For some test items, an interference signal needs to be su­perimposed on the test signal. The Keysight 81150A arbi­trary waveform generator can be used as the interference signal source. In addition, the Keysight N5395C Ethernet test fixture can be used to superimpose the interference signal. Power spectrum measurement using a spectrum analyzer is defined in the specification. The Keysight X-Series spectrum analyzer can be controlled directly from this software and measurement results are imported into the test report. With the exception of some test items, you can select a differential probe or coaxial cable as a signal input method to the oscilloscope.

It should be noted that BroadR-Reach does not specify a standard connector type. Therefore, the test fixture should be prepared, as necessary.

Cable / Connector Evaluation

Traditionally, a TDR oscilloscope was used for time domain measurements and a vector network analyzer for frequen­cy domain measurements. With ENA Option TDR, both the time and frequency domains can be analyzed with a single instrument.

By recalling the necessary setup file, you can easily setup, measure, and perform limit testing for pass/fail judgment.