Technical data

Low and Full Speed Tests 7
Notes on USB Electrical Compliance Testing 201
Configuring the Tests Make sure you set the Test Type configuration option
to “Low- Speed Near End” before running the test.
Connecting the Equipment The USB automated test application will prompt
you to perform these connection steps:
1 For 54831B/D and 54832B/D oscilloscopes, use 1165A passive probes.
For the 5485XA, 80000 and 90000A Series oscilloscpes, use E2697A
high- impedance converter with 10:1 passive probes, or 1156A active
probes.
2 Attach the passive probes to the oscilloscope's Channel 3 and Channel 2
inputs.
3 Attach the SQiDD board to the root hub on the host under test.
4 Attach a low speed device to the same section of the SQiDD board. If
the section has a switch, it should be set to ON.
5 Connect the oscilloscope Channel 2 probe to D- probe point on the
SQiDD board. Connect the oscilloscope Channel 3 probe to the D+ probe
point on the SQiDD board.
6 Exit the HS Electrical Test Tool if you have previously launched it.
7 Check I have completed these instructions.