Searching For The Peak - Agilent Technologies ENA Series User Manual

Data Analysis
Searching for Positions that Match Specified Criteria

Searching for the peak

The peak search function enables you to move the marker to the peak on the trace.
Definition of the peak
A peak is a measurement point whose value is greater or smaller than the adjoining
measurement points on its right and left sides. Peaks are classified into the following two
types depending on the difference in magnitude from the measurement points on either side
of it.
Positive peak
(
Negative peak
(
About the peak search function
The peak search is a function that searches for a peak that matches a pre-defined lower
limit for the peak excursion value and peak polarity (positive or negative) and then moves
the marker to the peak being searched.
The peak excursion value is the smaller of the differences in measured values from the
adjoining peaks of the opposite polarity.
Figure 6-11 Positive peak/Negative peak and peak excursion value
The following three methods are available for executing the peak search:
Peak search
(
Left search
(
Right search
(
268
)
Positive
)
Negative
)
Search Peak
)
Search Left
)
Search Right
A peak whose measured value is greater than those of the
measurement points on either side of it (peak polarity: positive)
A peak whose measured value is smaller than those of the
measuring points on either side of it (peak polarity: negative)
Moves the marker to the maximum peak when peak polarity is
or . Moves the marker to the minimum peak when
Positive Both
peak polarity is .
Negative
Executes the search from current marker position to the smaller
stimulus values and moves the marker to first peak encountered.
Execute the search from current marker position to the larger
stimulus values and moves the marker to first peak encountered.
Chapter 6