DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes
5
Contents
USB 2.0 Signal Analysis—At a Glance
3
1 Preparing for Signal Quality Analysis
Oscilloscope Requirements
8
Fixtures for Signal Quality Tests
9
Fixtures for Hi-Speed Signal Quality Tests
9
Fixture for Full/Low Speed Signal Quality Tests
10
Probe Requirements
12
Differential Probe Connection for Hi-Speed Signal Quality Tests
12
Single-Ended SMA Cable Connection for Hi-Speed Signal Quality Tests
13
Single-Ended Probe Connection for Full/Low Speed Signal Quality Tests
14
Miscellaneous Cables and Devices
15
Additional Equipment and Set Up for Signal Quality Compliance Testing
16
High-Speed Electrical Test Bed Computer
16
Additional Set Up for Signal Quality Compliance Testing
17
2 Device Signal Quality Testing
Device Hi-Speed Signal Quality Test
20
Device Hi-Speed Connection - Differential Probe
24
Device Hi-Speed Connection - SMA Cables
25
Device Hi-Speed Compliance Test Packets
26
Device Full Speed Signal Quality Test
28
Device Full Speed Connection
30
Device Full Speed Compliance Test Packets
31
Device Low Speed Signal Quality Test
33
Device Low Speed Connection
35
Device Low Speed Compliance Test Packets
36
3 Host Signal Quality Testing
Host Hi-Speed Signal Quality Test
40
Host Hi-Speed Connection - Differential Probe
43
Host Hi-Speed Connection - SMA Cables
44
Host Hi-Speed Compliance Test Packets
44
