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Chapter 3: Testing Performance
To test the threshold accuracy
To test the threshold accuracy
Testing the threshold accuracy verifies the performance of the following
specification:
• Clock and data channel threshold accuracy.
These instructions include detailed steps for testing the threshold settings of
pod 1. After testing pod 1, connect and test the rest of the pods one at a time. To
test the next pod, follow the detailed steps for pod 1, substituting the next pod
for pod 1 in the instructions.
Each threshold test tells you to record a pass/fail reading in the performance test
record located at the end of this chapter.
Equipment Required
Set up the equipment
1 If you have not already done so, do the procedure “To set up the test
equipment and the logic analyzer” on page 23.
2 Set up the DC source to deliver a DC voltage on the output:
a In the function generator Utility menu, activate the DC Level. All AC
voltage functions will be disabled.
b Enable the high impedance load under the Output Setup menu.
3 Using a BNC-banana cable, connect the voltmeter to one side of the BNC
Tee.
4 Connect the BNC Tee to the output of the DC source. Set up the logic
analyzer.
Equipment Critical Specifications Recommended Model/Part
Digital Multimeter 0.1 mV resolution, 0.005% accuracy 3458A
Function Generator
Accuracy (5)(10
-6
) frequency,
DC offset voltage ±1.5 V
33250A
BNC-Banana Cable 11001-60001
BNC Tee 1250-0781
BNC Cable 8120-1840
BNC Test Connector, 17x2