Agilent Technologies 8133A Instrukcja Obsługi Pobierz pdf (Strona 49)

Testing Performance 3

16800 Series Portable Logic Analyzers Service Guide 49

3 Select the plus sign to expand bus “My Bus 1”.

Align the blue bars vertically

The first time you run eye finder, the blue bars will already

be vertically aligned (as shown above). In this case you can

skip to the next section (“Run eye finder”).

After running eye finder, the blue bars will not be vertically

aligned because an independent sample position will be

determined for each channel.

4 If the blue bars in the eye finder display are not

vertically aligned, grab the right-most blue bar in the “My

Bus 1” row 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.

5 Using the mouse pointer, grab the top blue bar for “My

Bus 1” and move it to the recommended starting position

of 300 ps. All of the blue bars below will follow.

Run eye finder

6 Click the Run button in the Thresholds and Sample

Positions dialog.

7 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.

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Agilent Technologies 8133A Instrukcja Obsługi Strona 49