Marker Functions; Sa Noise Marker - Keysight N9912A User Manual

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)

Marker Functions

Marker functions are used to change FieldFox frequency or distance settings to those
of the active marker.
How to use Marker Functions
 Activate the marker to move.
 Then press Mrk ->/Tools
 Then
 Then choose one of the following:
Data Analysis Features
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 for CAT and NA Modes; –90 for SA Mode.
Note: CAT mode Loss measurements are displayed in positive values. In these
cases, the Peak Threshold setting is inverted. For example, Peak Threshold = -20
will consider any peak that has less Loss than 20 dB to be valid.
The vertical distance (dB) between the peak and the valleys
Peak Excursion
o
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 for CAT and NA Modes; 6
dB for SA Mode.
Threshold: –10 dB
o
Excursion: 1 dB
o
Scale = 1 dB / Division.
o
Mkr ->
(Not available in DTF or SA Mode with zero span) The center
Mrk -> Center
o
frequency of the measurement becomes the value of the active marker. The
frequency span is adjusted accordingly.
(NA Mode ONLY.) The group delay value of the active marker
Mkr -> Delay
o
becomes the electrical delay setting of the trace. Learn how to set group delay
format on page 41. Learn more about electrical delay on page 43.
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