Connect-Tek USB-16 Manual do Utilizador descarregar pdf (Página 33)

Host High Speed Electrical Test Procedure Revision 1.4

4.9 Host Test J/K, SE0_NAK (EL_8, EL_9)

1. Connect the short USB cable dongle of the HS Device SQ segment of the TDSUSBF test

fixture into the upstream facing port of the known good high-speed device. Connect the Init

port of the test fixture to the port under test. Apply power to the device. Ensure that the Test

Init switch is in the Init position.

2. Select TEST_J from the Port Control dropdown menu. Enter the port number and click

Execute once to place the port under test into TEST_J test mode.

Figure 20: Host Port TEST_J

3. Using a DVM measure the DC voltage on the D+ line at J36 with respect to ground (outside

pins of J36 are the ground pins). Record in section EL_8.

4. Using a DVM measure the DC voltage on the D- line at J36 with respect to ground. Record in

section EL_8.

5. On the Host Test menu, select TEST_K from the Port Control dropdown menu. Enter the port

number and click Execute once to place the port under test into TEST_K test mode.

Figure 21: Host Port TEST_K

6. Using a DVM measure the DC voltage on the D- line at J36 with respect to ground (Outside

pins of J36 are ground pins). Record in section EL_8.

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Connect-Tek USB-16 Manual do Utilizador Página 33