Tektronix RSA6100A Series, Help Manual

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RF Measurements > Common Controls for RF
Measurements Displays Freq & RBW Tab
Freq & RBW Tab
The Freq & RBW tab speci fi es frequency parameters for some of the RF Measurements displays.
Setting Description
Meas Freq Speci fi es the measurement frequency.
Step The Step control sets the increment/decrement size for the knob adjustment of the
center frequency. Arrow key adjustment of frequency is also affected (it is 10x the knob
adjustment). If Auto is enabled, the spectrum analyzer will adjust the Step size as
required.
RBW Select Auto or Manual. Adjusts the RBW for the entire measurement. This setting is
Independent of the Spectrum view’s RBW setting.
VBW Adjusts the VBW (Video Bandwidth) value.
xxx
NOTE.
While the measurement frequency and step settings on this control tab are shared between ACPR,
MCPR and Occupied Bandwidth, the RBW setting is not shared. The RBW setting is unique for each
measurement.
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.
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 Series instruments, this
condition is met by disabling the VBW function.
RSA6100A Series Real-Time Spectrum Analyzers Help
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