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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
437
User Manual 1178.3370.02 ─ 09
File contents
Description
XAxisUnit;FREQ_HZ
Unit of x values
XAxisScaleMode;ABSOLUTE
Scaling of x-axis (absolute or relative)
YAxisUnit;LEVEL_DB
Unit of y values
YAxisScaleMode;ABSOLUTE
Scaling of y-axis (absolute or relative)
NoOfPoints
;5
Number of points the line is defined by
Data section for individual data points
-4500000000;-50
x- and y-values of each data point defining the line
-2000000000;-30
-1000000000;0
0;-30
2500000000;-50
7.12
Zoomed Displays
You can zoom into the diagram to visualize the measurement results in greater detail.
Using the touchscreen or a mouse pointer you can easily define the area to be
enlarged.
Graphical Zoom Versus Measurement Zoom
Graphical zooming is merely a visual tool, it does not change any measurement set-
tings, such as the number of sweep points, the frequency range, or the reference level.
Graphical zooming only changes the resolution of the displayed trace points tempora-
rily. You must explicitly activate the graphical zoom function (see
Graphical zoom and the number of sweep points
Note that (graphical) zooming is merely a visual tool, it does not change any measure-
ment settings, such as the number of sweep points!
You should increase the number of sweep points before zooming, as otherwise the res-
olution of the trace in the zoomed region is poor (see
Chapter 7.6.1.8, "How Much Data
is Measured: Sweep Points and Sweep Count"
When you change the display using touch gestures, however, the corresponding mea-
surement settings are adapted (see also
Chapter 5.4.4, "Touchscreen Gestures"
on page 74). For example, dragging horizontally in a spectrum display changes the
center frequency. Dragging vertically in a spectrum display changes the reference level
(for absolute scaling). These changes are permanent for the measurement. This
behavior is also referred to as
measurement zoom
, and is active by default in the new
R&S
FPL1000.However, you can also activate it manually for a display that has
Zoomed Displays