Users Guide

642 | Spectrum Analysis Dell PowerConnect W-Series ArubaOS 6.1 | User Guide
The example in Figure 152 shows how an FFT Power chart could appear if a single data measurement was plotted
as a simple line graph.
Figure 152 Simple Line Graph of FFT Power Data
Now, suppose that each channel’s FFT power level was also represented by a color that corresponded to that
specific FFT power level. In the example below, channel 12 has a FFT power level of -50 dBm, so it is represented
by the color red. Channel 1 has a FFT power level of -85 dBm, so it is represented by dark blue.
Figure 153 FFT Power Line Graph with Color
If the graph was then flattened so each channel’s FFT power for that single1-second sweep was represented only
by a color (and not by a value on the y-axis), the graph could then appear as follows:
Figure 154 FFT Power Spectrogram Sample
The spectrum analysis Swept Spectrogram measures FFT power levels or duty cycle data each second, so after
every 1-second sweep, the newest data appears as a thin colored line on the bottom of the chart. Older data is