Agilent Technologies N5416A Manual de Serviço descarregar pdf (Página 87)

Hub Hi-Speed Tests 4

Notes on USB Electrical Compliance Testing 87

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 E2649- 66404 (E2645- 66506 if you are

using the old fixture) Disconnect test fixture (J5).

2 Attach the Agilent 113xA differential probe to TP2 of the test fixture,

using a damped 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+, which is the pin nearest the USB connector.

3 Set the Test switch to the TEST position. This sets the test fixture to

emulate a must- not- disconnect threshold.

a Verify both the green Power LED and yellow Test LED are lit

4 Cycle power on the hub under test. Connect the upstream port of the

hub to the host computer, using the 5 meter USB cable.

5 Check I have completed these instructions.

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Agilent Technologies N5416A Manual de Serviço Página 87