Chapter 3 Functions of the Front Panel of RTSA RIGOL
RSA3000 User Guide 3-19
Density
Measurement Interface:
Figure 3-2 Density View
The instrument defaults to Density measurement mode, and the measurement
interface is shown in the figure above. After you select Density to be the
measurement type, press Meas Setup to set the relevant parameters.
Remarks:
⚫ The density is defined as the number of times a frequency and amplitude point
is hit during an acquisition interval.
⚫ The Density view will also display a white trace. This trace shows the real-time
spectrum for the latest acquisition interval. When using positive peak, negative
peak, or average detectors, the white trace obtains detector data from all the
data within the acquisition time; when using the Sample detector, the last FFT
was used.
⚫ To display the signal status within a longer time range, you can display multiple
Density views on the screen. The latest Density view is displayed with the
highest brightness. The longer the time from the latest Density view, the lower
brightness of the Density view. Such display of the brightness is generally called
persistence view.
⚫ The Density view is displayed combined with the persistence view. X-axis
represents frequency, Y-axis represents amplitude, Z-axis represents number of
hits, and T-axis represents time. This view displays four dimensional data on a
two dimensional display, using color to represent Z-axis and brightness to
represent T-axis.
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