Measurement
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The multi-peak search function enables you to display markers on multiple
peaks on traces.
Definition of the Peaks
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 types depending on the difference in magnitude
from the measurement points on either side of it.
Positive peak
(Positive)
A peak of which the measurement value is greater
than the measurement points on either side of it
(peak polarity: positive).
Negative peak
(Negative)
A peak of which measurement value is smaller than
the measurement points on either side of it (peak
polarity: negative).
About the Multi-peak Search Function (Search Multi Peak)
The multi-peak search is a function that searches for peaks that match
with pre-defined lower limit for the peak excursion value and peak polarity
(positive or negative) and then displays the markers on the peaks being
searched. Depending on number of detected peaks, markers 1 through 9
are displayed from the start frequency.
The peak excursion is the smaller of the differences in measurement values
from the adjoining peaks of the opposite polarity.
When the multi-peak search is executed, search and
tracking settings for markers 1 through 9 are ignored and the
settings for the multi-peak search are used. Note that the reference
marker is not affected.
Positive Peak/Negative Peak and Peak Excursion
Multi-peak Search (when peak polarity is positive)
Executing a Multi-peak Search
1. Activate the marker you are using for the multi-peak search.
2. Press Marker Search > Multi Peak > Peak Excursion
3. Enter the lower limit for the peak excursion value.
This causes the multi-peak search to be executed based on the
definitions of the newly set lower limit for the peak excursion value and
currently set peak polarity.
4. Press Peak Polarity.
5. Select a peak polarity from positive, negative or both.
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