Technical data

70 DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes
5 Hub Downstream Signal Quality Testing
Hub Downstream Hi-Speed Connection - SMA Cables
Perform these connection steps:
1 Attach the 5V power supply to J5 of the E2649- 66402 Host Hi- Speed
Signal Quality test fixture.
Set the TEST switch to the ON position.
Verify green POWER LED and yellow TEST LED are both lit.
2 Connect the upstream port of the hub to a high-speed root port of the
test bed computer.
3 Connect the [TEST PORT] of the test fixture into the down stream
facing port under the test of the hub. Apply power to the hub.
4 Attach the SMA cables to the SMA connectors D+ and D- of TP2 on the
test fixture.
1
2
3
4
Hi-Speed Host
Hub
upstream
port
downstream
port under
test
P1
4“
Init. Port
Test
Port
5V
D+
D-
TP2
Host Hi-Speed
Signal Quality
Test Fixture
SMA cables