Connect-Tek USB-16 Manual de usuario descargar pdf (Pagina 15)

Host High Speed Electrical Test Procedure Revision 1.4

14. Select TEST_PACKET from the Port Control dropdown menu. Enter the port number of the

port being tested and click Execute. This forces the port under test to continuously transmit test

packets

Figure 5: TEST_PACKET

15. Using the oscilloscope, verify that test packets are being transmitted from the port under test.

Adjust the trigger level as necessary. If a steady trigger cannot be obtained by adjusting the

trigger level, try a slight change to the trigger hold-off.

16. Once the test packet is displayed properly, press OK in the application dialog box.

17. The Tektronix USB application generally triggers and displays the correct test packet without

the need to place cursors. Should cursors be required, they may be enabled by selecting within

the application, File> Preferences> Advanced and clicking the optional Packet Identification by

user using Cursors.

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Connect-Tek USB-16 Manual de usuario Pagina 15