Chapter 3: Testing Performance

To test the threshold accuracy

Test the ECL Threshold

1Set up the logic analyzer:

a In the Analyzer Setup dialog, click the threshold field for Pod 1. The Threshold Settings dialog appears.

b In the Threshold Settings dialog, select Standard and ECL (–1.30 V).

cClick OK to close the Threshold Settings dialog.

dClick OK to close the Analyzer Setup dialog.

2Test the high-to-low transition:

a On the DC source, enter a voltage setting of –1.384 V.

b On the logic analyzer, click the Run icon. The display should show all channels at a logic "0".

3Test the low-to-high transition:

a On the DC source, enter a voltage setting of –1.216 V.

b On the logic analyzer, click the Run icon. The display should show all channels at a logic "1" (0x1FFFF).

4Record a PASS/FAIL in the performance test record for Threshold Accuracy Pod 1 - ECL.

30

Page 30
Image 30
Agilent Technologies 1680, 1690 manual Test the ECL Threshold