Teledyne LeCroy USB Protocol Suite User Manual (Voyager_Advisor T3_Mercury) - Manual (Page 374)

Teledyne LeCroy Corporation USB 3.0 Electrical Test Modes
374 USB Protocol Suite User Manual
Loopback Mode test procedure
1. Connect the DUT to the Exerciser port:
For Device Loopback: Attach DUT to Port A
For Host Loopback: Attach DUT to Port B
2. Set recording options:
For Device DUT Loopback: Set Voyager as Host Emulator
For Host DUT Loopback: Set Voyager as Device Emulator
3. In the Misc USB 3.0 tab, uncheck the Filter‐Out Logical Idles an Filter‐Out SKPs
option.
Initiating loopback mode requires that the DUT successfully link trains with the Voyager
exerciser. Verify that the link reaches U0 by pressing the Record button and looking at
traffic for LUP/ LDN link commands.
You can optionally set the analyzer to record the Loopback traffic to verify that the
system enters loopback. If you elect to record Loopback traffic, it is recommended that
you set Trigger on the Loopback command by setting Trigger on TS2 with loopback bit
asserted.