Tektronix TDSUSBF, Инструкция по эксплуатации

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TDSUSBF Test Fixture
TDSUSBF USB 2.0 Compliance Test Fixture Instructions
3
Installation
To use the test fixture, refer to Figure 1 on page 6, and do the following:
CAUTION.
To prevent damage to the test fixture, always work at a static-approved
workstation when handling the fixture.
1.
Set the fixture on a nonconductive work surface.
CAUTION.
To prevent damage to TDR heads, the board must be powered on in
the following sequence.
2.
To operate various relays, the TDSUSBF high-speed signal quality section
requires a 5-volt power supply. Depending on the jumper selection on the
test fixture, you can select one of the following power options:
H
USB host-supplied Vbus power.
H
User-supplied 5-volt power supply. The external power supply must be
capable of providing 500 mA.
Recommended or equivalent: ITE Power Supply, Ault Inc., part number
PW10DEA0503F01.
To select user-supplied 5-volt power, place the jumper between the center pin
and the pin marked JACK of J91. Connect the power supply cable to the DC
Power In jack, J35 located at the bottom of the board.
To select USB Vbus power, place the jumper between the center pin and the
pin marked USB of J91. Connect a USB cable from the Host supplying
Vbus power to J92.
3.
Check that either the TEST or INIT LED is on. If it is not, remove the power
supply cable from the DC Power In jack or from the USB connector, and
check for shorts.
4.
Place the switch S6 in the INIT position. The INIT status LED illuminates.
5.
Connect the board for specific tests as described in Table 2 on page 7.