Technical data

Hub Hi-Speed Tests 4
Notes on USB Electrical Compliance Testing 113
port under test of the hub and a known good hi- speed device, nearest
to the 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 a known good device using
the 4" USB cable.
c Connect the test fixture's [INIT PORT] to the hub's downstream port
under test using the 1 meter USB cable.
d Apply power to the hub and the known good device.
3 Check I have completed these instructions.