Teledyne LeCroy USB Protocol Suite User Manual (Voyager_Advisor T3_Mercury) User Manual
Page 375
USB Protocol Suite User Manual
375
USB 3.0 Electrical Test Modes
Teledyne LeCroy Corporation
4. Select the Electrical Test window from the View Menu.
5. Click the Loopback Test check box.
Figure 12.15: USB 3.0 Electrical Test
Use the termination buttons to verify that a device sees (or does not see)
termination from the exerciser ports. After you finish, be sure to put them back in
the mode that you expect them to be in when done.
6. Set the Loopback Interval. This is the time interval in milliseconds in which each of
the BERT ordered sets (BRST, BDAT, and BERC) will be transmitted. The minimum
value is 1 ms. The maximum value is 2^28 = 268,435,456 ms.
7. Press the Start button.
Loopback entry and pattern generation occurs immediately after the link partners
complete training. SSC is enabled within the transmitted loopback pattern. If the
analyzer is used to record the exchange, the loopback traffic should appear in both
upstream and downstream directions, with individual BERT ordered sets.
In the image below, the Voyager initiates loopback testing on a host (upstream) port.
Uncheck the Hide Logical Idle Packets option, on the toolbar or View menu. Then use the
Link Tracker to verify that the pattern is transmitted (see
)