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.

Table 222: FFT Duty Cycle Options

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

For spectrum monitors using the 5 GHz radio band, select either 20 MHz or 40 MHz channel

 

numbering to identify a channel numbering scheme for the graph.

 

NOTE: This parameter is not configurable for graphs created by hybrid APs or spectrum monitor

 

radios that use the 2.4 GHz radio band.

 

 

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-Axisparameter, 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.

 

 

Center Frequency

If you selected Frequency in the X-Axisparameter, enter the frequency, in MHz, that you want to

 

appear in the center of the x-axis of this chart.

 

 

Span

If you selected Frequency in the X-Axisparameter, specify the size of the range of frequencies

 

around the selected center frequency. If you set a frequency span of 100 MHz, for example, the

 

chart shows the FFT duty cycle for a range of frequencies from 50MHz lower to 50 MHz higher

 

than the selected center.

 

 

Show

Select a checkbox to display that information on the FFT Duty Cycle chart.

 

Duty Cycle: The percentage of duty cycle the channel or frequency was actively utilized.

 

Max Hold: The maximum recorded percentage of active duty cycles for the channel

 

frequency since the chart was last reset. To clear this setting, click the down arrow at the

 

end of the title bar for this graph and select Reset MaxHold.

 

Max of last sweeps: By default, this chart shows the maximum percentage of active duty

 

cycles for the channel of frequency recorded during the last 10 sweeps. To change the

 

number of sweeps used to determine this value, enter a number from 2 to 20, inclusive. To

 

clear this setting, click the down arrow at the end of the title bar for this graph and select

 

Reset MaxNSweep.

 

 

Interference Power

The Interference Power chart displays various power levels of interest, including the Wi-Fi AP with maximum signal strength, noise, and interferer types with maximum signal strength. The ACI displayed in the Interference Power Chart is the ACI power level based on the signal strength(s) of the Wi-Fi APs on adjacent channels. A higher ACI value in Interference Power Chart does not necessarily mean higher interference since the AP that is contributing to the maximum ACI may or may not be very actively transmitting data to other clients at all times. The ACI power levels are derived from the signal strength of the beacons.

This chart displays the noise floor of each selected channel in dBm. The noise floor of a channel depends on the noise figure of the RF components used in the radio, temperature, presence of certain types of interferers or noise, and the width of the channel. For example, in a clean RF environment, a 20 MHz channel has a noise floor around -

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

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Dell 6.2 manual Interference Power

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