Users Guide

Dell PowerConnect W-Series ArubaOS 6.1 | User Guide Spectrum Analysis | 625
Active Devices Trend
The Active Devices Trend chart is a line chart that shows the numbers of Wi-Fi and non-Wi-Fi devices seen on
each radio channel during the displayed time interval. The data in this chart updates every five seconds. When
you hover your mouse over any line in the chart, a tooltip displays the number of active devices for the selected
device type. The example in Figure 141 shows that there are 27 active Wi-Fi APs on channel 157 of the upper 5
GHz radio band.
Activity Duration Amount of time that the device has been active.
To filter the output of this table to show devices that have been active within a specific time range,
click the icon in the column heading.
Select Any to display all entries, regardless of how long the device has been active.
To display entries for devices active for a specific time range:
1. Select the button by the > symbol.
2. Click drop-down list with the > symbol and select either > (Greater than), < (Less than), <= (less
than or equal to), or >= (more than or equal to) to limit the output of this table to devices that have
been active for a specified time range.
3. Enter the number of hours or minutes in the time range you want apply to this filter.
4. Click the min. drop-down list and select either min. or hrs. to define the time range in minutes or
hours.
5. Click OK to save your settings and return to the Active Devices table.
Channels Affected Radio channels affected by the device’s transmission. By default, the Active Devices table for a
spectrum monitor shows entries for all devices, regardless of the channels their transmissions may
affect.
To filter the output of this table to show devices that affect a specific channel or range of channels,
click the icon in the column heading.
 Select Any to display all entries, regardless of the channels that device may affect.
 Select Single Channel then enter the channel value to only display devices that affect the
specified channel.
 Select Range of Channels then enter the lower and upper channels in the channel range to filter
the output to show only those devices whose transmissions affect the specified channel range.
This option is only available for tables created by spectrum monitors, not hybrid APs.
 Select Specified Channels to show only those devices whose transmissions affect selected
channels. If you choose this option, you can click the none checkbox to show only those devices
whose transmissions do not affect any other channels, select all to show devices whose
transmissions affect any channel, or click the checkboxes by individual channel numbers to
show only those devices whose output affect those selected channels. This option is only
available for tables created by spectrum monitors, not hybrid APs.
Click OK to save your settings and return to the Active Devices table.
NOTE: This option is not available for Active Devices tables created by a hybrid AP, because each
hybrid AP monitors a single channel only.
Device ID The spectrum monitor or hybrid AP applies a unique device ID per device type to each device it
detects on the radio channel.
To display the entry for a device that matches a single device ID, click the icon in the column heading
and enter the device ID. Click OK to save your settings and return to the Active Devices table.
Center Frequency (MHz) Signals from a wireless device can spread beyond the boundaries of an individual 802.11 channel.
This table column shows the center frequency for the device’s transmission, in megahertz.
Occupied Bandwidth Channel bandwidth used by the device, in megahertz.
Table 129 Active Devices Table Options (Continued)
Parameter Description