GraphTitle Description Update
Interval
ActiveDevices
Trend
Ali ne chart showing the numbers of up to five different types of Wi-Fi and
non-Wi-Fi devices seenon selected channels during a specified tim e
interval. This chartcan show devices on mul tiple channels for a spectrum
monitor, or the single monitored channel for a hybrid AP. For details, see
"ActiveDevices Trend" on page 587.
Updatesevery 5 seconds
Channel Metrics Thisstacked bar chart shows the current relative qual ity, availability or
utilization of selected channels in the 2.4GHz or 5 GHz radio bands. This
chartcan show mul tiple channels for a spectrumm onitor, or the single
monitored channel for a hybrid AP. For details, see "Channel Metrics" on
page588.
Updatesevery 5 seconds
Channel Metrics
Trend
Ali ne chartshowi ng therel ativequal ityor avail ability of selectedchannel s
in the2.4 GHz or 5 GHz radio bands over a specified time interval.
Spectrumm onitors can show channel data form ultiple channels, while a
hybridAP shows information onl yfor its one monitored channel. For
details, see"Ch annel Metrics Trend" on page 590.
Updatesevery 5 seconds
Channel
Summary Table
TheChannel Summary table displays thenum ber ofdevices found on each
channel in the spectrumm onitor’s radio band, the percentage ofchannel
utilization, and AP power and interference levels. Spectrum monitors can
showdata for multipl e channels, while a hybrid AP shows a channel
summaryonl y for its one monitored channel. For details, see"Channe l
SummaryTable" on page 592.
Updatesevery 5 seconds
Channel
Utilization Trend
Ali ne chartthat shows the channel utilization for one or more radi o
channels, asm easuredover a defined time i nterval. Spectrum monitors
canshow data for multipl e channels, while a hybrid AP shows utilization
levelsfor its one monitored channel onl y. Fordetail s, see"Ch annel
UtilizationTrend" on page 594.
Updatesevery 5 seconds
DeviceDuty Cycle Astacked bar chart showing the percent of each channel in the spectrum
monitor radio’s frequency band utilized by a Wi -Fi AP or any other device
typedetected by the spectrum monitor. The Device DutyC ycle chartfor a
hybridAP onl yshows data for the one channel monitored by the hybrid AP.
Thischart i s notavai lable for W-AP120 Series or W-AP68 access points.
Fordetails, see "Device Duty Cycle" on page593.
Updatesevery 5 seconds
Devicesvs
Channel
Astacked bar chart showing the total num bers of each device type
detectedon each channel in the spectrum monitor radio’ sfrequency band.
TheDevices vs Channel chart for a hybrid AP only shows data for the one
channel monitored by thehybrid AP. Fordetails, see "Devices vs Channel"
onpage 595.
Updatesevery 5 seconds
FFTDuty Cycle FastFourier Transform, or FFT, is an algori thm forcom puting thefrequency
spectrumof a tim e-varying input signal. This line chartshows the FFT duty
cycle, which representsthe percent of time a signal is broadcast on the
specifiedchannel orfrequency. Spectrum moni torscan show data for
multiple channels, while a hybrid AP shows information only for its one
monitored channel.
Thischart i s notavai lable for W-AP120 Series or W-AP68 access points.
Fordetails, see "FFT Duty Cycle" on page 597.
Updatesevery second
Interference
Power
Thischart shows information about Wi-Fi i nterference,i ncluding the Wi-Fi
noisefloor, andthe amount of adj acent channel interference from cordless
phones,bl uetoothdevices and microw aves.S pectrum monitors can show
Updatesevery 5 seconds
DellPowerConnect W- Series ArubaOS 6.2 | UserGuide SpectrumAnalysis | 572