Agilent Technologies N5416A Instrukcja Obsługi Pobierz pdf (Strona 118)

118 Notes on USB Electrical Compliance Testing

4 Hub Hi-Speed Tests

Configuring the Tests

Connecting the Equipment

The USB automated test application will prompt you to perform these

connection steps:

1 Connect the E2697A with 10073C passive probe or the 1156A active

probe on Channel 2 to the D- pin at TP2 of the E2649- 66401

(E2645- 66507 if you are using the old fixture) Device Hi- Speed Signal

Quality test fixture.

2 Connect the E2697A with 10073C passive probe or the 1156A active

probe on Channel 3 to the D+ pin at TP2.

3 Connect both probe grounds to GND leads.

4 Connect the [INIT PORT] of the test fixture into the host controller

port, using the 5- meter USB cable.

5 Connect the [TEST PORT] on the fixture to the upstream port of the

hub.

6 Apply power to the hub. Do not apply 5V to the test fixture.

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

with 50 Ohm terminators.

8 Check I have completed these instructions.

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Agilent Technologies N5416A Instrukcja Obsługi Strona 118