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1
Preparing for Signal Quality Analysis
Additional Equipment and Set Up for Signal Quality Compliance Testing
When performing USB 2.0 signal quality compliance testing (instead of
testing the signal quality of real- world packets):
• You need a high- speed electrical test bed computer and the High- Speed
• See also:
High-Speed Electrical Test Bed Computer
The high- speed electrical test bed computer hosts a USB 2.0 compliance
host controller for hi- speed hub or device electrical test, or serves as a
test bed host for a USB 2.0 host controller under test. For instructions on
configuring this computer, refer to the High- Speed Electrical Test Toolkit
Setup Instruction document which comes with the
Test Tool Kit Software"
Table 2
High-Speed Electrical Test Bed Computer
Equipment Required
High-Speed Electrical Test Bed Computer
High-Speed Electrical Test Tool Kit software (USBHSET)
High-Speed Electrical Test Tool Kit Software
You can download the High- Speed Electrical Test Tool Kit software
(USBHSET) from the developers tools page at the USB Implementers
Forum web site, "http://www.usb.org/developers/tools".
The High- Speed Electrical Test Tool Kit software contains and uses a
proprietary EHCI driver stack. The use of this proprietary EHCI driver
stack facilitates the electrical testing that requires direct control of the
command registers of the USB EHCI host controllers. The end result is a
much more robust test bed environment.
Because the proprietary EHCI driver stack is designed for debug and test
validation purposes, this driver stack does not support the normal
functionality as found in the EHCI drivers from Microsoft (or the device
16
Electrical Test Tool Kit software (USBHSET) in order to generate
compliance test packets. See
Computer"
on page 16.
"Additional Set Up for Signal Quality Compliance Testing"
page 17.
DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes
"High- Speed Electrical Test Bed
on page 16.
Tests and Quantities
Host
Hi-Speed
1
1
"High- Speed Electrical
Hub
Device
Low/Ful
Hi-Speed
Hi-Speed
l Speed
1
1
1
1
1
1
on
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