Tektronix TDS5032, Руководство пользователя

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Operating Basics
Figure 10: Results of the Inrush current check
Droop Measurement
The Droop voltage is the difference in the V
BUS
voltage when you apply a no load
condition and a 100 mA load to the port under test (all other ports are fully
loaded).
The Droop test evaluates the worst case droop by alternately applying a droop
load and no load to the port under test while all other ports are supplying the
maximum load possible. All the V
BUS
measurements are relative to local ground.
The TDSUSB2 application automatically sets up the oscilloscope for the
specified test configuration. When you start the application, it acquires the signal,
and provides the V
DROOP
measurement, and displays PASS or FAIL.
Figure 11: Results of the Droop measurement
Note: The TDSUSB2 application helps to report the Drop test. You can do this by
enabling an option in the File> Preferences> Advanced menu. You can enter the
multimeter reading for the Drop test in the TDSUSB2 application during report
generation for a consolidated report.
TDSUSB2 Universal Serial Bus Measurement Package 31