Technical data

112 Notes on USB Electrical Compliance Testing
4 Hub Hi-Speed Tests
Selecting the Tests
Configuring the Tests
Connecting the Equipment
The USB automated test application will prompt you to perform these
connection steps:
1 Connect the E2649- 66402 (E2645- 66508 if you are using the old fixture)
Host Hi- Speed Signal Quality test fixture between the upstream facing
port of the hub and the host controller port.
a Attach the differential probe to TP2 of the fixture. Ensure the +
polarity on the probe lines up with D+ on the fixture.
b Connect the fixture's [INIT PORT] to the hub's upstream port, with
the 5 meter USB cable.
c Connect the fixture's [TEST PORT] to the host controller port, using
the 4" USB cable.
2 Connect the E2649- 66401 (E2645- 66507 if you are using the old fixture)
Device Hi- Speed Signal Quality test fixture between the downstream