Agilent Technologies N5416A Wartungshandbuch PDF herunterladen (Seite 91)

Hub Hi-Speed Tests 4

Notes on USB Electrical Compliance Testing 91

Configuring the Tests

Connecting the Equipment

The USB automated test application will prompt you to perform these

connection steps:

1 Connect the E2649- 66401 (E2645- 66507 if you are using the old fixture)

Device Hi- Speed Signal Quality test fixture [INIT PORT] into a

high- speed capable port of the test bed. Do not apply 5V to the test

fixture.

2 Connect the test fixture [TEST PORT] into B receptacle of the upstream

facing port under test of the hub, using the 4" USB cable. Apply power

to the hub.

3 Attach the Agilent 113xA differential probe to D+/D- of TP2 on the test

fixture, using a damped header adapter (the header adapter is only

needed if you are using the old test fixture).

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

with 50 Ohm terminators.

5 Check I have completed these instructions.

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Agilent Technologies N5416A Wartungshandbuch Seite 91