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DisplayPort PHY tester gets flying colors from VESA

Posted: 04 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:DisplayPort receiver PHY tester? sink device? VESA?

The industry's first fully automated DisplayPort receiver PHY compliance test solution has been demonstrated by Agilent Technologies Inc. as meeting the requirements of the DisplayPort compliance test specification. In February, Agilent's DisplayPort source test solution was approved as the first Video Electronics Standards Association (VESA) DisplayPort compliant source test solution.

Agilent demonstrated complete test automation for a DisplayPort sink device, including control of the DUT and test instrumentation. The key measurement for sink compliance is a stressed signal test called jitter tolerance that requires involved engagement with the test device as it goes through training (frequency and symbol lock sequences) and bit error measurement. This compliance test is augmented by full, flexible characterization and margin testing, said the company. Complementary tests such as sensitivity and intra-pair skew tests provide additional value.

The DisplayPort standard defines a high-bandwidth interface for connecting laptops or personal computers with display monitors, or connecting computers with high-definition consumer electronics devices.

Addressing certification
The Agilent DisplayPort automation solution addresses the need for efficient and consistent certification processes in compliance test labs, and enables fast design and margin analysis where repetitive measurements are required for temperature and design variability. After the initial setup, this solution allows fully operator-free tests with superior signal quality and performance.

The complete Agilent DisplayPort sink solution includes a W2641A DisplayPort test point access adaptor; a device for controlling the auxiliary channel; the J-BERT N4903A or ParBERT 81250A;

and the N5990A test automation software platform.

The automated solution is controlled from a Windows XP PC. It is the latest application suite plugging into a modular, flexible test automation software platform. The software platform was introduced in January 2005. It includes a test sequencer and supports a whole range of digital high-speed bus compliance test software modules for PCIe, USB, serial ATA, HDMI and DisplayPort.

Providing quality
Agilent's precision BERT generators with independently controllable signal stress sources provide quality test results while enabling designers to efficiently control signal parameters. The full test automation now combines signal quality with test speed. Automated DisplayPort PHY receiver tests increase productivity significantly. As a representative DisplayPort device, the Analogix Semiconductor DisplayPort receiver ANX9813 was used in the PlugFest demonstration. Analogix develops analog and mixed-signal devices for digital media and communications interconnect applications.

"Agilent has served a crucial role in the development and deployment of the DisplayPort standard," added Craig Wiley, director of Technical Marketing with Analogix Semiconductor. "Over the last couple of years they have been a major contributor to the standard by being the first with measurement equipment and leading the PHY compliance efforts. By collaborating with Agilent, Analogix and other semiconductor companies were able to finalize the DisplayPort standard by validating the performance and interoperability objectives that this next-generation interface is poised to deliver."

"This automated solution is a result of our customers sharing their difficulties in bringing products and new technologies to market, and is the first DisplayPort receiver test automation on the market," said Brian Fetz, DisplayPort program manager of Agilent's Digital Test Division. "We are excited about the value it offers our customers and the DisplayPort industry. Engineers are now able to test their DisplayPort designs systematically and 50 percent faster compared to manual test, while maintaining superior signal quality and performance. This is achieved with efficient, open, user-friendly top-level control software."

The Agilent DisplayPort solution is available with price starting at $250,000.





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