Teledyne LeCroy USBTracer_Trainer - Users Manual - Manual (Page 347)

USB Protocol Suite User Manual Chapter 12: Traffic Generation (3.0 Exerciser)
LeCroy Corporation
333
Note: The Voyager Loopback Mode does not alter the transmitted signal and does
not perform the jitter tolerance electrical test defined in USB-IF Electrical
Layer Compliance Specification. Specialized equipment, such as LeCroy's
PERT Receiver Tolerance Test system, should be used to introduce jitter as
defined by the Electrical Layer Compliance Specification.
12.11.2 Compliance Mode
The Voyager USB 3.0 Electrical Test window supports entry to the Polling.Compliance
substate. This initiates the transmission of the pseudo-random data pattern generated by
the scrambled D10.0 compliance sequence. The Voyager system USB 3.0 Electrical Test
window can initiate the required test modes, while an attached oscilloscope is used to
measure the transmitted compliance patterns.
After the DUT is in the Compliance state and is sending a compliance pattern (CP0), the
pattern will be transmitted continuously until a ping LFPS is detected at the DUT receiver.
The Voyager system does not send a compliance pattern but remains in electrical idle
while the Compliance mode is operational. The Voyager can transmit subsequent
ping.lfps signals interactively to advance the DUT to the next compliance pattern.
Compliance Mode test procedure
Step 1 Connect the DUT or HUT to a test fixture board (for example, an Intel board), so
that transmit signals go to the oscilloscope and receive signals come from the
analyzer.
Intel Test Fixture