Administrator Guide

Parameter Description
Show lines for these
channels
The Active Devices Trend chart can display values for up to five different device
types on different channels for a spectrum monitor, or a single device type for a
hybrid AP.
To choose which type of data each line should represent, click the channel
number drop-down list and select a channel within the radio band, then click the
device type drop-down list and select one of the following device types.
l WiFi (AP)
l Microwave (This option is only available for 2.4 GHz radios)
l Bluetooth (This option is only available for 2.4 GHz radios)
l Fixed Freq (Others)
l Fixed Freq (Cordless Phones)
l Fixed Freq (Video)
l Fixed Freq (Audio)
l Freq Hopper (Others)
l Freq Hopper (Cordless Network)
l Freq Hopper (Cordless Base)
l Freq Hopper Xbox (This option is only available for 2.4 GHz radios)
l Microwave (Inverter) (This option is only available for 2.4 GHz radios)
l Generic Interferer
Select the checkbox beside each channel and device entry to show that
information on the chart, or deselect the checkbox to hide that information. For
more information on non-Wi-Fi device types detected by a spectrum monitor, see
Working with Non-Wi-Fi Interferers on page 816.
Channel Metrics
This stacked bar chart can show one of three different types of channel metrics; channel utilization,
channel availability, or channel quality.
This chart displays channel utilization data by default, showing both the percentage of each monitored channel
that is currently being used by Wi-Fi devices, and the percentage of each channel being used by non-Wi-Fi
devices and 802.11 adjacent channel interference (ACI).
ACI refers to the interference on a channel created by a transmitter operating in an adjacent channel. A transmitter
on a nonadjacent or partially overlapping channel may also cause interference, depending on the transmit power of
the interfering transmitter and the distance between the devices. In general, ACI may be caused by a Wi-Fi
transmitter or a non-Wi-Fi interferer. However, whenever the term ACI appears in Spectrum Analysis graphs, it
refers to the ACI caused by Wi-Fi transmitters. The channel utilization option in the Channel Metrics Chart shows the
percentage of the channel utilization due to both ACI and non-Wi-Fi interfering devices. Unlike the ACI shown in the
Interference Power chart, the ACI shown in this graph indicates the percentage of channel time that is occupied by
ACI or unavailable for Wi-Fi communication due to ACI.
The Channel Metrics graph can also show channel availability, the percentage of each channel that is available
for use, or display the current relative quality of selected channels in the 2.4 GHz or 5 GHz radio bands.
Spectrum monitors can display data for all channels in their selected band. Hybrid APs display data for their
one monitored channel only.
Dell Networking W-Series ArubaOS 6.4.x | User Guide Spectrum Analysis | 794