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E2688A, N5384A High-Speed Serial Data Analysis and Clock Recovery Software

Data Sheets

The Keysight Technologies, Inc. High-Speed Serial Data Analysis (SDA) software provides you with a fast and easy way to pinpoint signal integrity problems and validate performance for serial interface designs. Perform mask testing, characterize serial data streams that employ embedded clocks, and decode 8b/10b data.

SDA software enables engineers to verify compliance to computer, communication, and data communications standards such as PCI Express®, Serial ATA, Serial Attached SCSI (SAS), Fibre Channel, XAUI and Gigabit Ethernet.

The BER contour feature provides data valid window measurement capability with components of noise and jitter. This allows designers such as memory DDR4 and LPDDR4 to make JEDEC compliance measurements.

SDA software and the Infiniium oscilloscopes offer several features to simplify the validation of serial interface designs:

Real-time eye display with Mask unfolding

The real-time eye display is reconstructed from all unit intervals in the oscilloscope memory aligned by the recovered clock. In this display mode the center screen (or zero in the time base) corresponds to the active edge of the recovered clock. Each signal including channels and functions can be displayed as a real-time eye.

With the High-Speed SDA software, once you identify a failure of the eye mask, you can unfold the eye diagram to show the specific unit interval that caused the failure. When used with the 8b/10b decoding feature you can identify data dependent errors that result in eye mask violations caused by Inter-Symbol Interference (ISI).

8b/10b decoding

When used with the Infiniium Series oscilloscopes, you can perform 8b/10b decoding with the analog view of a serial data stream. You can use your oscilloscope to assist you with debugging during the link bring-up phase of development. In addition you can use the 8b/10b decode feature to help solve disparity error problems or bit error rate performance problems resulting from ISI.

BER contour analysis and measurement setup

You can perform BER contour analysis to make accurate data valid window measurements. The BER contour is computed statistically from jitter and noise components of the signal. The timing parameters specific to the BER contour in accordance to the DDR4 and LPDDR4 JEDEC specification are timing data input valid window (TdiVW) and voltage data input valid window (VdiVW).

Mask testing

When used with the Keysight Infiniium oscilloscopes, masks are provided for the following standards:

- PCI Express (2.5 Gb/s)

- Fibre Channel Electrical (1.0625, 2.125 and 4.25 Gb/s)

- Serial ATA

- Serial Attached SCSI (SAS)

- XAUI

- FlexRay

 

When performing a mask test, the High-Speed SDA software indicates the number of waveforms (acquisitions) and unit intervals tested, and the number waveforms and unit intervals that failed. This information helps determine your level of confidence in meeting a given target bit error ratio.

Easy measurement setup

The High-Speed SDA software extends the ease-of-use advantages of Keysight’s Infiniium oscilloscopes to the analysis of serial data. A wizard walks you quickly through the steps required to setup and perform a measurement. Intuitive displays and clear labeling of information make it easy to comprehend measurement results.

SDA provides a real-time eye menu. The menu is located in the display menu under color grade view. Use this menu to change scaling, look only at worst case edges, and decide which bits you want to include in your real-time eye.

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