Reference Packet Parameter Test Equipment Setup
5. Apply the power to the DUT.
6. Attach the differential p robe near the device connector on the test fixture.
Set up the Oscilloscope for High Speed Host
1. Select the measurement and run the application. The application automatically sets the oscilloscope
parameters (Horizontal, Vertical, and Trigger) and displa ys the message,"Press OK when correct
waveform is
acquired”. You can see the SOFs o n the oscilloscope screen.
2. If you are not able to acquire the waveform automatically, perform Autosetup in the oscilloscope to
display th
eSOF.
3. Click here to find out how to adjust the trigger manually.
a. If your DUT is EL_21, EL_23, EL_25, select the Single Step Set Feature option from the
HS electrical test tool.
b. If your DUT is EL_22, select the Step button in the HS electrical test tool to acquire the
waveform as shown in the next figure.
204 TDSUSB2 Universal Serial Bus Measurements Package
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