Displaying and Navigating the Scan Plots - 2023.2 English

Vivado Design Suite User Guide: Programming and Debugging (UG908)

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2023.2 English

After a scan is created, it automatically launches the Scan Plots window for that scan. For 2D Eyescan, the plot is a heat map of the BER value.

Figure 1. Scan Plot Window

As in other charts and displays within the Vivado IDE, the mouse gestures for zooming in the eye scan plot window are as follows:

  • Zoom Area: left-click drag from top-left to bottom-right
  • Zoom Fit: left-click drag from bottom-right to top-left
  • Zoom In: left-click drag from top-right to bottom-left
  • Zoom Out: left-click drag from bottom-left to top-right

Also, when the mouse cursor is over the Plot, the current horizontal and vertical codes, along with the scanned BER value is displayed in the tooltip. You can also change the plot type by clicking the Plot Type button in the plot window, and choosing Show Contour (filled), Show Contour (lines), Bathtub (Center Horizontal Line), and Heat Map.

A summary view is present at the bottom of the scan plot, stating the scan settings, along with basic information like when the scan was performed. During the 2D Eyescan, the number of pixels in the scan with zero errors is calculated (taking into account the horizontal and vertical increments), and this result is displayed as Open Area. The Scan window contents are sorted by Open Area by default, so the scans with the largest open area appear at the top. The following figure is a Bathtub plot for the same scan as shown in the previous figure.

Figure 2. Bathtub Plot