Administrator Guide

Table Of Contents
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 lowerto 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.
Channel Range For graphs created by spectrum monitors, specify a channel range to determine
which channels appear in this graph. 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 graph.
This graph displays all channels within the spectrum monitor’s radio band by default.
NOTE: This parameter is not configurable for graphs created by hybrid APs.
Display Mode Select Channel Quality to show the relative quality of the channel. Channel Quality
is a weighted metric derived from key parameters which include noise, non-Wi-Fi
(interferer) utilization and duty-cycles, and certain types of retries.
Select Channel Availability to show the percentage of the channel that is unused
and available for additional Wi-Fi traffic.
Select Channel Utilization to show both the percentage of the channel that is
currently used by Wi-Fi devices, and the percentage of each channel that is being
used by non-802.11 devices or 802.11 adjacent channel interference (ACI).
Table 157: Channel Metrics Options
Channel Metrics Trend
By default, this line chart shows the current relative quality of selected channels in the 2.4 GHz or 5 GHz radio
bands over a period of time. The Channel Metrics Trend chart can also be configured to display trends for the
current availability of selected channels, or the percentage of availability for those channels.Spectrum monitors
can display data for up to five different channels. Hybrid APs display data for their one monitored channel
only.
For more information on how the spectrum analysis feature determines the quality of a channel, see Channel
Metrics on page 794.
When you hover your mouse over any line in the chart, a tooltip displays channel quality or availability data for
that individual channel at the selected time.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Spectrum Analysis | 796