Tektronix TDSUSB2, Manual

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Application Examples
This section presents the application examples. The simplified examples
highlight the application measurements and show how to use the application to
solve your test problems.
To use these examples, you must have the TDSUSB2 application installed and
enabled on the oscilloscope. Connect the probes to your unit under test (UUT),
and perform the configuration tasks. For information, see
Installing the
application and Starting the Application.
Full Speed Signal Quality Tests for Downstream Testing
Specifying the Equipment-Full Speed Signal Quality Downstream Tests
The following equipment is needed for downstream signal quality check on a
Full Speed device testing:
Tektronix digital oscilloscope
TDSUSB2 application
TDSUSBF compliance test fixture
Three P6245 or TAP1500 single-ended voltage probes
Typical Equipment Setup-Full Speed Signal Quality Downstream Tests
To set up the equipment for Full Speed Signal Quality Downstream test, follow
these steps:
1. Set the S6 switch to the Init position.
2. Use the adapters to connect the A receptacle from Device SQ test section
(marked DUT) of the test fixture to the USB2.0 Low Speed device.
3. Connect Ch1 of the D+ probe to the D+ pins on the Device SQ section of the
test fixture.
4. Connect Ch2 of the D– probe to the D– pins on the Device SQ section of the
test fixture.
5. Connect the Init port of the Device SQ section of the test fixture to any port
of the unit under test (hub) using the USB cable.
TDSUSB2 Universal Serial Bus Measurement Package
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