Technical data

108 Notes on USB Electrical Compliance Testing
4 Hub Hi-Speed Tests
2 Connect the E2649- 66402 (E2645- 66508 if you are using the old fixture)
Host Hi- Speed Signal Quality test fixture between the downstream port
under test of the hub and a known- good hi- speed device.
a Attach the differential probe to D+/D- of TP2 on the fixture. Ensure
the + polarity on the probe lines up with the D+ on the fixture.
b Connect the test fixture's [TEST PORT] to the hub downstream port
under test, using the 4" USB cable.
c Connect the test fixture's [INIT PORT] to the known good device
using the 1 meter USB cable.
d Apply power to the hub and the known good device.
3 Check I have completed these instructions.