What Is A 'Peak - Agilent Technologies FieldFox N9923A User Manual

What Is a 'Peak'

You define what the FieldFox considers a "peak" by setting the Peak Threshold
and Peak Excursion.
These two peak criteria settings apply to markers 1 to 6 in the same mode, but
are set individually for CAT and NA Modes.
These settings survive a FieldFox or Mode Preset. They are reset to the default
values when the FieldFox power is shutdown.
NOTE Peak Threshold and Excursion are NOT available in DTF measurements.
However, peaks below –50 dB will NOT be found and this can NOT be changed.
How to set Peak Criteria
 Press Mrk ->/Tools.
 Then More.
 Then select the following:
For example, the settings for the trace in the following image are:
Peak A = Valid Peak (Above Threshold and Excursion Settings)
Peak B = Invalid Peak (Below 1 dB Excursion Setting)
Peak C = Invalid Peak (Below –10 dB Threshold Setting)
Data Analysis Features
Three markers are created and find the highest peaks (faults)
Find 3 Peaks
o
on the trace.
Minimum amplitude (dB). To be considered valid, the peak
Peak Threshold
o
must be above the threshold level. The valley on either side can be below the
threshold level. Default = –190.
The vertical distance (dB) between the peak and the
Peak Excursion
o
valleys on both sides. To be considered a peak, data values must "fall off"
from the peak on both sides by the excursion value. Default = 0.5 dB.
Threshold: –10 dB
o
Excursion: 1 dB
o
Scale = 1 dB / Division.
o
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