Teledyne LeCroy QPHY-USB - Manual (Page 31)

QPHY-USB Software Option
QPHY-USB Operator’s Manual Rev F
31
Figure 29. Chirp to Start of Frame Time
Device and Hub High-Speed Chirp Timing
1. Select Device or Hub in the Mode control and HS Chirp Timing in the Test control of the USB Test
Wizard.
2. Follow the instructions in the wizard menu to acquire the chirp timing waveform. The chirp waveform
should look like the following image: