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How to Search with Markers
The following menu structure applies to NA Mode. For keystroke information for
CAT Mode and SA Mode, see Hardkey/Softkey Menus on page 162.
Activate the marker to be used for the search (NOT necessary with Bandwidth
Then press Mrk ->/Tools.
Then
Then choose one of the following:
126
search.)
Marker Search
(NA Mode ONLY)
Tracking ON OFF
o
o
ON causes the active marker to search for the specified criteria with each
new sweep. Search criteria can include: Target, Bandwidth, Peak, Min.
The searches begin with the first sweep after Tracking is turned ON,
based on the current search type. The stimulus setting for a marker can
NOT be changed manually. Trk appears next to the marker number.
o
OFF causes a new marker search only when the search feature is re-
executed.
Peak
Moves the active marker to the HIGHEST amplitude data point of the
o
trace. Peak Excursion value is ignored. In SA Mode, the LO feed-through
signal (0 Hz) is also ignored.
Min
(Not available in DTF) Moves the active marker to the LOWEST
o
amplitude data point of the trace.
Target
(NA Mode ONLY) Enter the Target value. The marker moves to the
o
first occurrence of the Target value to the right of its current position. The
FieldFox interpolates between measured data points to find the exact Target
value to two decimal points. The interpolated X-axis value is displayed in the
marker readout or marker table. Subsequent presses of the Target softkey
cause the marker to move to the right to find the next occurrence of the
Target value. When the marker reaches the end of the stimulus range, it
"wraps around" and continues the search from the beginning of the stimulus
range.
Bandwidth ON OFF
o
and OFF. When OFF, the marker table appears showing the X and Y-axis
positions of all enabled markers.
(NA Mode ONLY) Specify the level in dB from the peak or valley
Bandwidth
o
where bandwidth is measured.
o
Negative numbers search for a Peak bandpass, such as a filter S21
response.
o
Either of the following TWO methods can be used to search for a Valley or
Notch filter, such as the S11 response of a bandpass filter.
o
Negative values search down from the TOP (MAX) of the response.
o
Positive values search up from the BOTTOM (MIN) of the notch.
o
If you first enter Negative, then Positive values, it may be necessary to
press Marker , then More, then
(NA Mode ONLY) Use to quickly toggle BW Markers ON
Markers All Off.
N9912A FieldFox User's Guide
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