Technical data

14 DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes
1 Preparing for Signal Quality Analysis
Single-Ended Probe Connection for Full/Low Speed Signal Quality Tests
Low and Full Speed host tests require two single- ended probes.
Low and Full Speed device tests require three single- ended probes — the
third probe is for the adjacent D- /D+ signal.
The passive probes that are included with the oscilloscope are sufficient.