158 FieldFox User’s Guide
o Mkr->Tune Freq (SA mode with Tune & Listen ONLY) The Tune & Listen
Frequency becomes the frequency of the active marker.
The following applies to DTF Measurements ONLY:
o More then:
o Marker=>Start Distance The Start Distance of the measurement becomes
the value of the active marker. Markers that would no longer appear on the
screen are moved to the new Start Distance.
o Marker=>Stop Distance The Stop Distance of the measurement becomes
the value of the active marker. Markers that would no longer appear on the
screen are moved to the new Stop Distance.
SA Marker Functions
The following Marker Functions are available in SA Mode ONLY:
Noise Marker
Band/Interval Power Marker
Frequency Counter at Marker
Audio Beep with Marker
Learn more about these marker functions starting on page 103.
All about Limit Lines
Limit lines are visual representations, drawn on the FieldFox screen, of the
specified limits for a measurement. With this capability, you can easily compare
measured data versus specifications. Optionally, you can enable an audible beep
and display Pass or Fail information for each measurement.
You can have up to as many limit line segments as there are data points for
each measurement trace allowing you to test all aspects of your measurements.
Limit lines are available in CAT Mode, NA Mode, and SA Mode. Power Meter
Mode uses different limit settings. Learn more on page 139.
Limit lines and limit testing are NOT allowed in NA Mode with Smith Chart or
Polar display formats.
A simple Display Line is also available in SA Mode ONLY. Learn more on page
103.
Limit lines can be saved and recalled with an *.sta file. Learn more on page
164. They can also be saved and recalled independently from the Limit
softkeys. Learn more on page 161.
How to Create Fixed Limit Lines
There are two ways to build a Fixed limit line:
1. Build (limits) From a Trace. Learn how on page 160
2. Enter X/Y data points into the on-screen editor. The limit line is formed as
the FieldFox ‘connects the dots’ on the screen. To create frequency gaps that
are NOT tested, use separate limit lines. The X-axis values for two lines can
overlap.
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