Specify a single point of interest. Add an annotation between adjacent points derived
from the single point.
As an example, add an annotation to indicate the -3 dB transmission bandwidth.
Select the trace where you want to read the derived width.
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On the Cartesian
context tab, on the Measure tab, on the Custom annotations group, click the Derived width icon.
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Under Relative to the, click Global
maximum.
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Under Place the annotation at, from the drop-down list select an offset of.
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[Optional] Under Text, clear the Auto
text check box and add the text you want displayed in the
annotation.
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Click Create to create the annotation and to close
the dialog.