Teledyne LeCroy QPHY-USB - Manual (Page 6)

6
QPHY-USB Operator’s Manual Rev F
INTRODUCTION
QPHY-USB is an automated test package that performs all the required tests from the USB-IF for physical layer
compliance of USB2.0 hosts, hubs, and devices. The package contains software that runs within the LeCroy
WavePro 7000A series, WaveMaster, SDA, WaveRunner 6000A or WaveRunner Xi series of X-Stream digitizing
oscilloscopes, and an optional pair of test fixtures for coupling into the electrical USB signals.
The QPHY-USB option gives the user the ability to both automate compliance testing and debug devices, hosts
and hubs. Users may be specifically interested in the following capabilities:
• Users interested in compliance testing should begin by using QualiPHY.
•
Users interested in debugging circuits, should begin by using the oscilloscope’s embedded test tools.
• Users that begin by using QualiPHY may detect failures on their device, and then have the option of
switching to the oscilloscope’s embedded test tools.
This manual covers the use of both QualiPHY (compliance testing) and the oscilloscope’s embedded test tools
(debugging).
The software and fixture combine to perform the following measurements for USB2.0 hosts, hubs, and devices.
Device tests
•
HS Upstream Signal Quality
o
Far-end for tethered hubs
o
Near-end for un-tethered hubs
• HS Packet Parameters
•
HS Chirp Timing
•
HS Suspend / Resume / Reset
• HS Upstream J and K Voltages
• HS Upstream Receiver Sensitivity
•
FS Upstream Signal Quality
• LS Upstream Signal Quality
•
Inrush current
• Back-Voltage
Host tests
•
HS Downstream Signal Quality
• HS Downstream Packet Parameters
• HS Downstream Chirp Timing
•
HS Downstream Suspend / Resume / Reset
• HS Downstream Disconnect
• HS Downstream J and K Voltages
•
FS Downstream Signal Quality
• LS Downstream Signal Quality
• Drop
•
Droop