Oscilloscopes support CAN eye-diagram mask test.May 30, 2012 -
With eye-diagram mask testing capability, 3000 X-Series oscilloscopes let engineers perform composite signal-integrity measurement of differential CAN serial bus. CAN eye-diagram test randomly captures and overlays every differential bit of every CAN frame based on clock-recovery algorithm that emulates worst-case CAN receiver hard synchronization, resynchronization, and sampling. This provides insight into overall signal integrity of CAN's physical layer.
Original Press release
Agilent Technologies, Inc.
5301 Stevens Creek Blvd.
Santa Clara, CA, 95051
USA
Technologies Introduces CAN Eye-Diagram Mask Testing on InfiniiVision X-Series Oscilloscopes
SANTA CLARA, Calif. - Agilent Technologies Inc. (NYSE: A) today introduced the oscilloscope industry's first eye-diagram mask testing capability for the differential Controller Area Network serial bus. The CAN serial bus is used extensively for control and sensor monitoring in automotive applications as well as a broad range of industrial and medical equipment applications.
For years, oscilloscopes have been the primary measurement tools used to verify the signal integrity of the CAN bus physical layer. With the new CAN eye-diagram mask test capability in Agilent's 3000 X-Series oscilloscopes, engineers now have the ability to perform a composite signal-integrity measurement of their CAN buses in one easy measurement.
Eye-diagram mask testing is one of the most important ways designers can measure the overall signal quality of their serial bus networks. The CAN eye-diagram test randomly captures and overlays every differential bit of every CAN frame based on a unique clock-recovery algorithm that emulates worst-case CAN receiver hard synchronization, resynchronization and sampling. The result is a single measurement that provides insight into the overall signal integrity of the CAN's physical layer to show worst-case timing and worst-case vertical amplitude variations. Overlaid bits are then continually compared against a six-point polygon-shaped pass/fail mask limit, which is based on CAN physical-layer specifications.
Controller Area Networks are based on an asynchronous event-driven architecture, so physical delays are the dominant contributor of timing uncertainty. The longer the Controller Area Network, the longer the delays. Agilent's new CAN eye-diagram mask testing capability clearly detects and shows these worst-case network delays.
Information about the DSOX3AUTO option is available at www.agilent.com/find/scopes-auto. Product photographs and screen images of a CAN eye-diagram mask test are available at www.agilent.com/find/caneye_images.
Information about the Controller Area Network standard can be found at www.can-cia.org.
U.S. Pricing and Availability
The DSOX3AUTO CAN/LIN trigger and decode option and the DSOX3MASK mask-test option (both are required for CAN eye-diagram mask testing) are priced at $729 each. The entry-level price of an Agilent InfiniiVision 3000 X-Series oscilloscope with these options is $4,324. Customers who already own an Agilent 3000 X-Series oscilloscope with the DSOX3AUTO and DSOX3MASK options can upgrade their scopes with the latest firmware to enable CAN eye-diagram mask testing at no charge.
Agilent also provides a broad range of specific mask-test files based on differential probing polarity, baud rate and network length. These mask-test files can be downloaded at no charge.
About Agilent Technologies
Agilent Technologies Inc. (NYSE: A) is the world's premier measurement company and a technology leader in chemical analysis, life sciences, electronics and communications. The company's 18,700 employees serve customers in more than 100 countries. Agilent had net revenues of $6.6 billion in fiscal 2011. Information about Agilent is available at www.agilent.com.
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