Technical data

150 Notes on USB Electrical Compliance Testing
5 Host Hi-Speed Electrical Tests
Running the Tests
1 Click Run Tests.
Test Instructions, Part 1
The USB automated test application will prompt you to perform these
steps:
1 Click [Enumerate Bus] and verify that the device enumerates properly.
2 Using the oscillopscope, verify SOFs (Start of Frame packets) are being
transmitted by the port under test. You may need to lower the trigger
level to somewhat below 400 mV to obtain a trigger.