Agilent Technologies N5416A Servisní příručka stáhnout pdf (Strana 146)

146 Notes on USB Electrical Compliance Testing

5 Host Hi-Speed Electrical Tests

3 Click OK to close the Test Instructions dialog.

Test Instructions, Part 2

The USB automated test application will prompt you to perform these

steps:

1 Connect the [TEST PORT] of the E2649- 66402 Host Hi- Speed Signal

Quality test fixture (E2645- 66508 if you are using the old fixture) into

the port under test of the host controller, using the 4" USB cable. The

host controller here refers to the Hi- speed Electrical Test Bed Computer

that has the HS Electrical Test Tool on it.

2 Select TEST_PACKET from the Port Control drop down menu.

3 Enter the port number of the port under test and click [EXECUTE].

This forces the port under test to continuously transmit test packets.

You should see the transmitted test packet on the oscilloscope as below.

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 235 236

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Agilent Technologies N5416A Servisní příručka Strana 146