Technical data

180 Notes on USB Electrical Compliance Testing

7 Low and Full Speed Tests

Host and Self-Powered Hubs

Equipment Used

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If you have the Agilent E2649-66405 Droop/Drop test fixture, you do not need the SQiDD board or the 500 mA

load board.

Selecting the Tests

Note: To do manual testing, choose Both for the Test Method option

under the Setup tab. There will then be several manual tests to choose

from under the Select Test tab.

Tabl e 3 3 Equipment Used in Host and Self-Powered Hubs Droop/Drop Tests

Quantity Item Description/Model

1 Oscilloscope Agilent 5485xA, 9000A Series, 80000 or 90000A Series,

54831B/D, or 54832B/D

2 Passive or active probes For 5485x, 9000A Series, 80000 and 90000A Series

oscilloscopes:

• Agilent E2697A with 10073C, or 1156A

For 54831B/D and 54832B/D oscilloscopes:

• Agilent 1165A

1 Digital Multimeter

(DMM)

Agilent 34401A or equivalent

1 Droop/Drop test fixture Agilent E2649-66405

SQiDD board

Agilent E2646A/B

500 mA load board

(see the schematic in Figure 5 on page 177)

1 1 meter USB cable Any listed on USB-IF web site