Technical data

188 Notes on USB Electrical Compliance Testing
7 Low and Full Speed Tests
Bus-Powered Hubs
Equipment Used
1
1
If you have the Agilent E2649-66405 Droop/Drop test fixture, you do not need the SQiDD board or the 100 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 4 Equipment Used in Bus-Powered Hubs Droop/Drop Tests
Quantity Item Description/Model
1 Oscilloscope Agilent 5485xA Series, 9000A Series, 80000 or 90000A
Series, 54831B/D, or 54832B/D
2 Passive or active probes For 5485x, 9000 SeriesA, 80000 and 90000A Series
oscilloscopes:
• Agilent E2697A with 10073C, or 1156A
For 54831B/D and 54832B/D oscilloscopes:
• Agilent 1165A
1 Droop/Drop test fixture Agilent E2649-66405
1 Digital Multimeter
(DMM)
Agilent 34401A or equivalent
1
SQiDD board
1
Agilent E2646A/B
1
100 mA load board
1
(see the schematic in Figure 4 on page 177)
1 1 meter USB cable Any listed on USB-IF web site