Agilent Technologies N5416A Instrukcja Obsługi Pobierz pdf (Strona 42)

42 Notes on USB Electrical Compliance Testing

3 Device Hi-Speed Tests

Configuring the Tests

Connecting the Equipment

The USB automated test application will prompt you to perform these

connection steps:

1 Remove the 5V supply. 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, using a

USB cable.

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

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

power to the device.

3 Ensure that the test switch on the test fixture is in the OFF position,

and the test LED is not lit.

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

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

only needed if you are using the old test fixture).

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 Instrukcja Obsługi Strona 42