Agilent Technologies N5416A Manual de Serviço descarregar pdf (Página 132)

132 Notes on USB Electrical Compliance Testing

4 Hub Hi-Speed Tests

The USB automated test application will prompt you for the following

voltage measurements:

EL_9 SE0_NAK Test

The USB automated test application will prompt you to perform these

steps:

1 Return the Test switch of the test fixture to the NORMAL position.

2 Cycle the hub power to restore the hub to normal operation. On the

Hub Test menu of the HS Electrical Test Tool, click [Enumerate Bus]

once.

3 Select TEST_SE0_NAK from the Hub Command drop down menu. Click

[EXECUTE] once to place the hub into TEST_SE0_NAK test mode.

4 Switch the test fixture into the TEST position.

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Agilent Technologies N5416A Manual de Serviço Página 132