User's Manual

Figure 117 FFT Duty Cycle
This chart shows the current duty cycle for devices on all channels being monitored by the spectrum monitor
radio by default. Table 144 describes the other optional parameters you can use to customize the FFT Duty
Cycle table. Click the down arrow in the upper right corner of this chart, then click the Options menu to access
these configuration settings. Once you have configured the desired parameters, click OK at the bottom of the
Options menu to save your settings and return to the spectrum dashboards.
Parameter Description
Band Radio band displayed in this graph.
For spectrum monitor radios using the 5 GHz radio band, click the Band drop-down
list and select 5 GHz upper, 5GHz middle or 5Ghz lower to display data for that
portion of the 5Ghz radio band. This parameter is not configurable for graphs
created by hybrid APs or spectrum monitor radios that use the 2.4 GHz radio band.
Channel Numbering
This parameter is not configurable for graphs created by hybrid APs or spectrum
monitor radios that use the 2.4 GHz radio band. A hybrid AP on a 20 MHz channel
sees 40 MHz Wi-Fi data as non-Wi-Fi data. For spectrum monitors using the 5 GHz
radio band, click the Channel Numbering drop-down list and select either 20 MHz
or 40 MHz channel numbering to identify a channel numbering scheme for the
graph. Graphs for AP radios that support 802.11ac include an additional 80MHz
option for very-high-throughput channels.
X-Axis Select either Channel or Frequency to show the duty cycle for a range of channels
or frequencies.
Channel Range If you selected Channel in the X-Axis parameter, you must also specify a channel
range to determine which channels appear in the x-axis of this chart. Click the first
drop-down list to select the lowest channel in the range, then click the second drop-
down list to select the highest channel to appear in the chart.
NOTE: This parameter is not configurable for graphs created by hybrid APs.
Table 144: FFT Duty Cycle Options
Dell Networking W-Series ArubaOS 6.4.x | User Guide Spectrum Analysis | 730