Teledyne LeCroy SDA III-CompleteLinQ - Manual (Page 30)

SDAIII-CompleteLinQ Software
8. Touch inside the Y field and enter a value from 0 to 100%. As you enlarge the mask's Y margin, you
widen the vertical dimension, bringing the mask closer to the top and bottom of your eye diagram.
This reduces the amount of vertical eye closure that can still pass the eye.
9. Margin only center area checkbox - Check to have only the center hexagon or diamond expand
when the mask margin is set to a value other than 0%
10. Vertical Eye Scales selectors - Select a mode of operation for vertical scaling the eye. Eyes for all ena-
bled lanes will use the same setting.
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Normal: Select to have the volts/div of the Eye trace for each lane follow the vertical scale of
the signal input to the Eye diagram algorithm. This typically will be the volts/div of the source
channel when using 1 input, or the sum when using two inputs.
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Auto Fit All Lanes: Select to adjust the vertical scales to a value and offset that places the "1"
level at +2.5div, and the "0" level at -2.5div.
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Lock All Lanes: Select to set the vertical scales to the value entered in the adjacent Ver Scale
entry box
Eye Diagram Configuration Dialog
The Eye Diagram right-hand dialog lets you configure how the eye diagram is displayed.
Show Eye - Displays the eye diagram(s).
Show Mask- Displays the mask template(s). If Custom or Clock is chosen for the Signal Type in the Signal
tab, then this checkbox is greyed out. (Users can create custom masks by defining a new signal type.)
Show IsoBER - Displays IsoBER, which provides a visual representation of the extrapolated eye diagram.
The IsoBER is calculated using the same algorithm that is used for the Crosstalk Eye.
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.
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