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FlexRay physical layer eye-diagram mask testing

Posted: 12 Aug 2010     Print Version  Bookmark and Share

Keywords:FlexRay physical layer  eye diagram test  mask testing 

Eye-diagram mask testing is one of the most important physical layer measurements that you can use to test the overall signal integrity your FlexRay system. Agilent provides seven different FlexRay mask files based on FlexRay physical layer standards/specifications for use with InfiniiVision 5000, 6000 and 7000 Series oscilloscopes (DSO or MSO) from Agilent. Which particular mask file you use is determined by the baud rate of your system, the test plane where testing will be performed (receiver input or transmitter output) and the type of output device that may be under test (Bus Driver or Active Star).

Eye-diagram testing is used in a broad range of today's higher speed serial bus applications including FlexRay. An eye-diagram is basically an overlay of digitized bits that shows when bits are valid (high or low). This provides a composite picture of the quality of a system's physical layer characteristics, which includes amplitude variations due to transmission line affects, reflections, over-shoot, ringing, signal edge placement and jitter.

This application note presents an overview of the various types of FlexRay eye-diagram mask testing that can be performed. It then discusses simple step-by-step instructions on how to set up eye-diagram mask tests on an Agilent InfiniiVision series oscilloscope.

View the PDF document for more information.

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