Agilent Technologies N5416A Wartungshandbuch Seite 107

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Seitenansicht 106
Hub Hi-Speed Tests 4
Notes on USB Electrical Compliance Testing 107
Selecting the Tests
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 between the upstream facing
port of the hub and the host controller port.
a Attach the differential probe to TP2 of the fixture. Ensure the +
polarity on the probe lines up with D+ on the fixture.
b Connect the fixture's [TEST PORT] to the hub's upstream port with
the 4" USB cable.
c Connect the fixture's [INIT PORT] to the controller port with the 5
meter USB cable.
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