Reference Full Speed Signal Quality HUB Downstream Setup
1. In the oscilloscope menu, select Vertical>Vertical Setup to display the Channel screen.
2. In the Scale field, increase the vertical scale values until the waveform is completely displayed on
screen.
Full Speed Signal Quality HUB Downstream Setup
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 D UT) 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 o f 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.
6. Select the measurement and select the
command button to run the application.
7. Select OK after acquiring a waveform. Verify that it is a correct waveform.
192 TDSUSB2 Universal Serial Bus Measurements Package
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