Agilent Technologies DP235 Guide de l'utilisateur Page 190

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190
Using the Oscilloscope
The Scope Auto Measure Menu
Criteria used for making automatic measurements
If more than one waveform, edge, or pulse is displayed, the
measurements are made on the first (leftmost) portion of the displayed
waveform that can be used. When any of the defined measurements are
requested, the oscilloscope first determines the top (100%) and base
(0%) voltages of the waveform. From this information, it can determine
the other important voltage values (10% voltage, 90% voltage, and 50%
voltage) required to make the measurements. The 10% and 90%
voltage values are used in the rise time and fall time measurements.
The 50% voltage value is used for measuring frequency, period, and
pulse width.
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