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Chapter 3: Testing Logic Analyzer Performance
Testing the Module Using a 16900-Series Mainframe
4 Select the plus sign to expand bus "My Bus 1".
Align the blue bars vertically
Initially, the blue bars will be vertically aligned. After running Eye Finder, the
blue bars will not be vertically aligned because an independent sample position
will be determined for each channel.
5 If the blue bars in the Eye Finder display are not vertically aligned:
a In the "My Bus 1" row, grab the right-most blue bar with the mouse
pointer and move it all the way to the left. Release the mouse button.
This will vertically align all of the blue bars.
6 Using the mouse pointer, grab the blue bar for "My Bus 1 (4 channels)"
and move it to the recommended starting position of -2.8 ns. All of the blue
bars will follow.
7 Select the Run button in the Eye Finder window.
8 Ensure that an eye appears for each bit near the recommended starting
position. Depending on your test setup, the eye position may vary. Any
skew between channel 1 and channel 2 of your pulse generator will cause
the eye position to shift to the left or right in the Eye Finder display. A
shift of up to 0.5 ns should be considered normal. The important point is
that your Eye Finder display should look similar to the picture below
(although it may be shifted left or right), and Eye Finder must be able to
place the blue bars in the narrow eye.
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