Connect-Tek USB-16 Manual do Utilizador descarregar pdf (Página 26)

Host High Speed Electrical Test Procedure Revision 1.4

5. Click the Disconnect Notify check box to monitor the disconnect status in the Status Window.

6. Using the oscilloscope, verify that the SOF packets are being transmitted from the port under

test. The differential amplitude should be less than +/- 525 mV. Verify that the Status Window

does not display Disconnect Event Detected. Record the pass/fail result in EL_37.

7. Set the TEST switch of the Disconnect test fixture to the Normal position and verify the yellow

TEST LED (D2) is not lit.

8. Use the oscilloscope to monitor the differential amplitude of the SOF. It should be greater than

+/- 625 mV. Verify that the Status Window now displays the Disconnect Event Detected.

Record the pass/fail result in EL_36.

9. Return the TEST switch on the fixture back to the TEST position and verify the yellow TEST

LED (D2) is lit.

10. Repeat steps 4 through 9 for all the remaining ports.

11. Remove the Disconnect test fixture from the port under test before proceeding.

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Connect-Tek USB-16 Manual do Utilizador Página 26