lFor SMs on the 5 GHz band, Wi-Fi APs on channel 36, 40 and 44.
Table2 08 describes the other valuesthat c anbe displayed in the Acti ve Devices Trend chart.Click the down arrow
in the upperright corner of this chart then click the Options menu to access the Acti ve Devices Trend
configuration settings. Once you have configuredthe desired parameters, click OK at the bottom of the Options
menuto save your settings and return to the spectrum dashboards.
Parameter Description
Band Radio band displayed in this graph (2.4GHz or 5 GHz).
Show Trend for Last Amountof elapsed time for which this chart should display data.
Channel Numbering For spectrum monitors using the 5 GHz radio band, selecteither 20 MHz or 40 MHz channel
numbering to identifya channel numberingscheme for the graph.
NOTE:Thi s parameter is not configurable for graphs created by hybrid APs or spectrum
monitor radios that use the2. 4 GHzr adio band. A hybrid AP on a 20 MHz channel sees40 MHz
Wi-Fi dataas non-Wi-Fi data.
Show lines for these
channels
TheActive Devices Trend chart can display values for up to fivedi fferentdevice types on
differentchannels for a spectrum monitor, or a single device type for a hybrid AP.
Tochoose whi ch typeof data each line should represent, click the channel number drop-dow n
listand select a channel w ithin the radio band, then click the device typedrop-dow n list and
selectone of the following device types.
lWiFi (AP)
lMicrowave
(Thisoption i s only available for 2.4 GHz radios)
lBluetooth
(Thisoption i s only available for 2.4 GHz radios)
lFixed Freq (Ot hers)
lFixed Freq (Cordl ess Phones)
lFixed Freq (Video )
lFixed Freq (Audio )
lFreq Hopper (O thers)
lFreq Hopper (Co rdless Netwo rk)
lFreq Hopper (Co rdless Base)
lFreqHopper Xbox
(Thisoption i s only available for 2.4 GHz radios)
lMicrowave (Inverter)
(Thisoption i s only available for 2.4 GHz radios)
lGenericInterferer
Selectthe checkbox beside each channel and device entry to show that information on the
chart,or unselect the checkbox to hide that information. For more information on non-Wi-Fi
devicetypes detected by a spectrum monitor, see "Working with Non-Wi-Fi Interf erers " on
page606.

Table20 8:

Active Devices TrendOptions

Channel Metrics
This stacked bar chart can show one of three differentt ypes of channelmetrics;

channelutilization

,

channel

availability

, or

channelquality

.
By default,t his chart displays channeluti lization data, showing both the percentage of each monitored channel that
is currentlybeing 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).
NOTE:ACI refers to the interference on a channel created by a transmitteroperating i n an adjacent channel. A transmitteron a
nonadjacentor partial ly overlapping channel may also cause interference, depending on the transmit power of thei nterfering
transmitterand/or the distance between the devices. In general, ACI may be caused by a Wi-Fi transmitter or a non-Wi-Fi interferer.
However,w heneverthe term ACI appears in Spectrum Analysis graphs, it refers to the ACI causedby Wi -Fi transmitters.The
channel utilization option in the Channel Metrics Chart shows the percentage of thechannel utilizationdue to both ACI and non-Wi-
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