Teledyne LeCroy SDA II - Manual (Page 22)

Serial Data Analysis II Software
Eye Saturation- Use the slider to increase or decrease eye saturation. The setting for saturation adjusts
the color grading or intensity. Slide to the left to reduce the threshold required to reach saturation.
Show Failures- Place a checkmark to show the mask failures. Mask failures are identified by contrasting
color spots which appear anywhere the data intersects the mask template. If Custom or Clock is chosen
for the Signal Type in the Signal tab, then this checkbox is greyed out.
Eye Style- You can choose the style you want to use to display the eye diagram. The selections are color-
graded or analog persistence. In color-graded persistence, pixels are given a color based on the pixel's rel-
ative population and the selected Eye Saturation. The color palette ranges from violet to red. When
analog persistence, is selected, the color used mimicks the relative intensity that would be seen on an
analog oscilloscope.
Start IsoBER Scan - Computes the IsoBER curves for values between the start and end BERs you specify.
The IsoBER curves display directly on the eye diagram itself.
IsoBER from/to/step - Select the range of BER values for which you would like to show contours in the
ISOBer plot.
Upsample- Increase from 1 to a higher number (e.g. 5) to fill in gaps in the eye diagram. Gaps can occur
when the bitrate is extremely close to a submultiple of the sampling rate, such that the sampling of the
waveform does not move throughout the entire unit interval. Gaps can also occur when using a record
length that does not sample a sufficiently large number of unit intervals. (Using record lengths of >= 1 mil-
lion points is recommended in order to acquire tens of thousands, if not hundreds of thousands, of unit
intervals.)
Eye diagam with ISOBer superimposed
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