General Signal Viewing > Common Controls for General
Signal Viewing Displays
Scale Tab
VBW
The VBW setting enables/disables the Video Bandwidth
fi
lter. VBW is used in traditional swept analyzers
to reduce the effect of noise on the displayed signal. The VBW algorithm in the analyzer emulates the
VBW
fi
lters of traditional swept analyzers.
The maximum VBW value is the current RBW setting. The minimum VBW value is 1/10,000 of the RBW
setting. VBW is disabled when the Filter shape is set to CISPR.
NOTE.
If you are following a procedure that says to "set VBW to three times the RBW value or greater", it
means that the test should be conducted with no VBW effects. In the RSA6100A, this condition is met by
disabling the VBW function.
Scale Tab
The Scale tab allows you to change the vertical and horizontal scale settings. Changing the scale settings
changes how the trace appears on the display but does not change control settings such as Measurement
Frequency. In effect, these controls operate like pan and zoom controls.
The Scale tab values are unique to each display. Also, note that each display uses horizontal and vertical
units that are appropriate for the display. For example, for the Spectrum display uses power (dBm) units
and frequency (Hz) units; the Amplitude vs. Time display uses power (dBm) and time (seconds) units; and
the Phase vs. Time display uses phase (degrees) and time (seconds) units.
Setting
Description
Vertical
Controls the vertical position and scale of the trace display.
Scale
Changes the vertical scale.
Offset
Vertical Offset adjusts the reference level away from top of the graph.
Autoscale
Resets the scale of the vertical axis to contain the complete trace.
Horizontal
Controls the span of the trace display and position of the trace.
Scale
Sets the period of time shown in the graph.
Offset
Allows you to pan a zoomed trace.
Autoscale
Resets the scale of the horizontal axis to contain the complete trace.
Reset Scale
Resets all settings to their default values.
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RSA6100A Series Real-Time Spectrum Analyzers Help
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Summary of Contents for RSA6100A Series
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