04 | Keysight | U4164A Logic Analyzer Module - Data Sheet
Product Description (Continued)
Beyond being a powerful general purpose logic analysis system, the U4164A system includes
specific tools and features to enable powerful debug, validation and analysis of DDR and
LPDDR memory systems.
Figure 1A shows the Read DQ and DQS eyes associated with byte lane 0 on a DDR4 system
operating at 3300 Mb/s data rate. This screen shot is captured in signal trace mode with no
back-to-back bursts so that the eyes for the entire burst of eight are displayed. The trace was
captured using the FS2510AB DDR4 DIMM interposer providing double probe points of each
DDR4 DQ with the logic analyzer module in dual-sample state mode. The U4164A logic analyzer
uses its unique eye scan capability to automatically place the sampling point in both time and
voltage within the eye on each individual channel for optimal sampling reliability.
Figure 1A. DDR4 3300 Mb/s read DQ bursts for bits D2 – D7 and DQS0.
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