User's Manual

Parameter Description
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 trans-
mission, in megahertz.
Occupied Bandwidth Channel bandwidth used by the device, in megahertz.
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. 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 110 shows
that there are 27 active Wi-Fi APs on channel 157 of the 5 GHz radio band.
Figure 110 Active Devices Trend Graph
An Active Devices Trend chart created by a hybrid AP displays data for the single channel monitored by that
device. For spectrum monitors, the Active Devices Trend chart can display values for up to five different
channels and device types. These graphs show the following data by default:
l For SMs on the 2.4 GHz radio band, Wi-Fi APs on channel 1, 6, and 11.
l For SMs on the 5 GHz band, Wi-Fi APs on channel 36, 40, and 44.
Table 137 describes the other values that can be displayed in the Active Devices Trend chart. Click the down
arrow in the upper right corner of this chart, then click the Options menu to access the Active Devices Trend
Dell Networking W-Series ArubaOS 6.4.x | User Guide Spectrum Analysis | 718