Common Analysis and Display Functions
R&S
®
FSMR3000
194
User Manual 1179.0116.02 ─ 02
8.2
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
When you change the display using touch gestures, however, the corresponding mea-
surement settings are adapted. For example, dragging horizontally in a spectrum dis-
play changes the center frequency. Dragging vertically in a spectrum display changes
the reference level (for absolute scaling). These changes are permanent for the mea-
surement. This behavior is also referred to as
measurement zoom
, and is active by
default in the new R&S
FSMR3.However, you can also activate it manually for a dis-
play that has already been zoomed graphically. In this case, the temporary changes to
the display are replaced by permanent changes to the measurement settings with the
same effect.
Example:
Assume you have a spectrum display from a spurious emission measurement. You
graphically zoom into the area around a detected spur. If you now activate a measure-
ment zoom, the reference level, the center frequency, the frequency span, and the
scaling settings are adapted so that the results of the measurement now indicate only
the formerly zoomed area around the detected spur.
Single Zoom Versus Multiple Zoom
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8.2.1
Single Zoom Versus Multiple Zoom
Two different (graphical) zoom modes are available: single zoom and multiple zoom. A
single zoom replaces the current diagram by a new diagram which displays an
enlarged extract of the trace. This function can be used repetitively until the required
details are visible. In multiple zoom mode, you can enlarge up to four different areas of
the trace simultaneously. An overview window indicates the zoom areas in the original
trace, while the zoomed trace areas are displayed in individual windows. The zoom
areas can be moved and resized any time. The zoom area that corresponds to the indi-
vidual zoom display is indicated in the lower right corner, between the scrollbars.
Zoomed Displays
