Specifications

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Chapter 3: Testing Performance
Test Pod 1 in the 400 Mb/s mode
pod 2 bits.
12 Assign bits 2, 6, 10, and 14 of Pod 1.
13 Ensure that the Pod 1 threshold is set to 1 volt. See page 53.
14 In the “Setup and Trigger...” window, Format tab, ensure that the J clock
threshold is still set to Differential.
15 Re-establish the trigger function:
a In the logic analyzer’s Setup and Trigger window, select the Trigger tab,
and the Trigger Functions subtab.
b Select “Find pattern n times” and select the “Replace” button.
c Enter “A” in the “Label 1 = “ field.
Determine and set Eye Finder Position (400 Mb/s mode)
16 In the “Setup and Trigger...” window, Sampling tab, Clock Setup area,
ensure that the clock mode is set to “Rising Edge”.
17 In the Eye Finder (Sampling Positions) window, expand “Label1 (4
channels)”.
18 Grab the blue bar for “Label1 (4 Channels)” and move it to approximately
0.9 ns. All blue bars will follow.
19 Run Eye Finder and note the average sampling position chosen by Eye
Finder:______ns. In the following example, the average sampling position
is 0.9 ns. Note that in this step, you place the blue bars in the first narrow
window (not the wide window) that appears to the right of zero in the Eye
Finder display. Then run Eye Finder. The position may be different based
on your test setup. Bring stray channels into alignment if necessary. See