BER contour analysis tool simplifies DDR4 and LPDDR4 JEDEC compliance measurements
The tool enables designers to make data valid window measurement with components of noise and jitter to ensure valid and accurate data transfer. The BER contour analysis tool is a capability added to the E2688A Serial Data Analysis software and runs on Keysight Infiniium S-Series, 90000A, V-Series and Z-Series oscilloscopes.
Double data rate (DDR) has defined its timing specifications with a belief of a zero BER. Latest DDR technology offers data rates of 3.2 Gb/s or higher. Each picosecond now matters and can be the difference in passing and failing bits. At the high data rates, noise and jitter affect the signal integrity. Measuring and understanding the components of noise and jitter can enable designers to maximize the margin to ensure valid and accurate data transfer. The timing parameters specific to the BER contour analysis in accordance to the JEEC specification are timing data input valid window (TdiVW) and voltage data input valid window (VdiVW).
The BER contour software tool uses accurate algorithm to measure jitter and noise to compute statistical measurement of the DDR data valid window. The tool helps the bit error rate to be quantified thereby increasing the margin of the DDR memory system.
Availability and Pricing
The Keysight BER contour tool is available as an added feature to the E2688A Serial Data Analysis/Mask Testing with Clock Recovery software which would require the N8823A EZJIT complete license. The E2688A tool is currently priced at $8,951 and the N8823A software is priced at $12,000.
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