Agilent Technologies N5416A Manual de servicio descargar pdf (Pagina 83)

Hub Hi-Speed Tests 4

Notes on USB Electrical Compliance Testing 83

Configuring the Tests

Connecting the Equipment

The USB automated test application will prompt you to perform these

connection steps:

1 Attach the 5V power supply to J5 of the E2649- 66402 (E2645- 66508 if

you are using the old fixture) Host Hi- Speed Signal Quality test fixture.

Set the Test switch to the TEST position. Verify green Power LED and

yellow test LED are both lit.

2 Attach the differential probe to TP2 of the test fixture, using the header

adapter (the header adapter is only needed if you are using the old test

fixture). Ensure the + polarity on the probe lines up with D+ on the

fixture, located nearest to the USB connector.

3 Connect the upstream port of the hub to a high- speed root port of the

test bed computer.

4 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.

5 If you are using the new fixture, please terminate the SMA connectors

with 50 Ohm terminators.

6 Check I have completed these instructions.

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Agilent Technologies N5416A Manual de servicio Pagina 83