Setting Up and Collecting Off Route Time Waveform Measurements
dataPAC User’s Guide
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Trigger Control
The trigger control parameter controls the slope type used for the trigger input. Your
selections are:
z
None - No trigger event is used for this measurement.
z
Positive Slope - Defines the trigger event to occur on a rising edge.
z
Negative Slope - Defines the trigger event to occur on a falling edge.
z
Leading Edge/Trailing Edge - Use this parameter to have the dataPAC automatically
select the rising edge or the falling edge of the trigger mark. The selection is dependent
upon the trigger pulse width and polarity. For example, if the trigger input is a narrow
positive pulse, then Leading Edge selects the rising edge of the trigger event and
Trailing Edge selects the falling edge.
Percent Pretrigger
The percent pretrigger parameter controls the amount of data collected prior to the trigger
event. This parameter can range from 1 to 100 percent. It only applies to triggered
measurements.
Average Type
This parameter selects the type of averaging for this measurement. Your selections are:
z
Moving - The measurements are averaged using equal weighting until the specified
number of averages has been collected. The measurement process continues with the
new data set being exponentially averaged with the previous data.
z
None - No averaging is performed. The measurement continues until the you press
<STORE> again.
z
Linear - The specified number of data sets is collected, linearly averaged together with
equal weight, and then the measurement is stopped.
z
R.M.S. - The specified number of data sets is collected, averaged together using a root-
mean-square calculation with equal weight, and then the measurement is stopped.
z
Peak-Hold - The specified number of data sets is collected, the amplitude value from
each bin is compared against the amplitude previously collected, the maximum for each
bin is held and displayed, and then the measurement is stopped.
Number Avg
Use this field to enter the number of averages for this measurement.
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