Technical data

Preparing for Signal Quality Analysis 1
DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes 13
Single-Ended SMA Cable Connection for Hi-Speed Signal Quality Tests
The Hi- Speed signal quality test fixtures have SMA connectors for probing
with SMA cables.
Figure 1 Differential Probe Setup
NOTE
In certain test situations, there may not be a ground connection between the oscilloscope
and the device under test (DUT). This may lead to the signal seen by the differential probe to
be modulated up and down due to the mid-frequency switching power supply. Connecting
the oscilloscope ground to the DUT ground will be required to establish a common ground
reference.