Technical data

Hub Downstream Signal Quality Testing 5
DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes 71
Hub Downstream Hi-Speed Compliance Test Packets
To set up the Host computer to transmit compliance test packets, perform
these steps:
1 Invoke the HS Electrical Test Tool software on the Hi- Speed Electrical
Test Bed computer. Select Hub and click the TEST button to enter the
Hub Test dialog box.
2 In the Hub Test dialog box, click the Enumerate Bus button once.
The hub under test should be enumerated with the hub's VID shown
together with the USB address.
3 Select TEST_PACKET from the Port Control drop down menu.
4 Enter the port number of the hub port being tested.
5 Click EXECUTE.