Administrator Guide

803 | Spectrum Analysis Dell Networking W-Series ArubaOS 6.4.x| User Guide
Parameter Description
Intervals The Channel Utilization Trend chart shows channel quality or channel availability
for the past 10 minutes by default. To view data for a different time range, click the
Intervals drop-down list and select one of the following options:
l 10 minutes
l 30 minutes
l 1 hour
Band Radio band displayed in this graph (2.4 GHz or 5 GHz).
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.
Show To select individual channels you want to display on this chart, click the checkbox
by a channel entry, then click the channel drop-down list to select the channel to
display. To hide a channel, uncheck the checkbox by that channel number.
Table 161: Channel Utilization Trend Options
Devices vs Channel
This stacked bar chart shows the current number of devices using each channel in the radio’s frequency band.
This chart can show separate per-channel statistics for the numbers of Wi-Fi devices, cordless phones,
bluetooth devices, microwaves, and other non-Wi-Fi devices.
If a device affects more than one channel, it is recorded as a device on all channels it affects. For example, if a
20Mhz Wi-Fi AP has a center frequency of 2437 Mhz (channel 6) it is counted as a device on channels 3-9
because it affects all those channels. Similarly, if a channel-hopping device uses all channels within a frequency
band, it is counted as a device on all channels in that band.
When you hover the mouse over any part of the chart, a tooltip shows the numbers of the device type
currently using that channel. The example in Figure 126 shows that the spectrum monitor can detect 42 APs
on channel 5.