TDSUSBF Test Fixture
TDSUSBF USB 2.0 Compliance Test Fixture Instructions
9
Two types of loads (passive and active) are provided on the fixture for you to
include in different tests and configurations. Eight separate passive loads, #1 to
#8, are switchable between 100 mA and 500 mA.
WARNING.
To avoid personal injury, do not touch the load resistors when using
the 500 mA load positions. The load resistors can become very hot.
The droop test load is an active load that switches between an open circuit
condition and 100 mA, at approximately a 2 Hz rate.
All loads connect through B-type receptacles that are mounted on the back of the
test fixture.
NOTE
. Switch numbers do not follow load numbers. For example, Switch 4
controls Load #2. See Table 4 for the correct switch/load combinations.
Use Table 4 and Figure 1 on page 6 to configure loads for specific tests.
Table 4: Load connections and switch settings
Load number
Connector number/type
Switch number
Switch positions
#1
J1 / B receptacle
S1
100 mA / 500 mA
#2
J4 / B receptacle
S4
100 mA / 500 mA
#3
J2 / B receptacle
S2
100 mA / 500 mA
#4
J3 / B receptacle
S3
100 mA / 500 mA
#5
J81 / B receptacle
S81
100 mA / 500 mA
#6
J150 / B receptacle
S51
100 mA / 500 mA
#7
J 71/ B receptacle
S71
100 mA / 500 mA
#8
J61/ B receptacle
S61
100 mA / 500 mA
Droop test
J5 / B receptacle
N/A
0 mA to 100 mA at ~2 Hz rate
Load Connections
