Technical data

Testing U4154A Performance 3
U4154A Logic Analyzer Service Guide 51
6 Select Do full time/voltage scan as the scan dimension.
7 Select the Lock thresholds checkbox and click OK.
8 Select the Run This Measurement button in the Eye Scan -
Sample Positions and Threshold Settings dialog.
9 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 scan display. A shift of up to 0.5 ns should be
considered normal. The important point is that your Eye
Scan display should look similar to the picture below
(although it may be shifted left or right), and Eye Scan
must be able to place the blue bars in the eye.