Alcatel-Lucent AOS-W 6.5.3.x - Page 752

752| Spectrum Analysis AOS-W 6.5.3.x| User Guide
Graph Title Description
Update
Interval
Device Duty
Cycle
A stacked bar chart showing the percent of each channel in the
spectrum monitor radio’s frequency band used by a Wi-Fi AP or
any other device type detected by the spectrum monitor. The
Device Duty Cycle chart for a hybrid AP only shows data for the
one channel monitored by the hybrid AP. For details, see Device
Duty Cycle on page 773.
5 seconds
Devices vs
Channel
A stacked bar chart showing the total numbers of each device
type detected on each channel in the spectrum monitor radio’s
frequency band. The Devices vs Channel chart for a hybrid AP
only shows data for the one channel monitored by the hybrid AP.
For details, see Devices vs Channel on page 775.
5 seconds
FFT Duty Cycle Fast Fourier Transform, or FFT, is an algorithm for computing the
frequency spectrum of a time-varying input signal. This line chart
shows the FFT duty cycle, which represents the percent of time a
signal is broadcast on the specified channel or frequency.
Spectrum monitors can show data for multiple channels, while a
hybrid AP shows information only for its one monitored channel.
For details, see FFT Duty Cycle on page 777.
1 second
Interference
Power
This chart shows information about Wi-Fi interference, including
the Wi-Fi noise floor, and the amount of adjacent channel
interference from cordless phones, bluetooth devices and
microwaves. Spectrum monitors can show interference power
data for multiple channels, while a hybrid AP shows information
only for its one monitored channel. For details, see Interference
Power on page 778.
5 seconds
Quality
Spectrogram
This plot shows quality statistics for selected range of channels
or frequencies as determined by the current noise floor, non-Wi-
Fi (interferer) utilization and duty-cycles and certain types of
retries. This chart can also be configured to show channel
availability, the percentage of each channel that is unused and
available for additional traffic. Spectrum monitors can show data
for multiple channels, while a hybrid AP shows information only
for its one monitored channel. For details, see Quality
Spectrogram on page 780.
5 seconds
Real-Time FFT Fast Fourier Transform, or FFT, is an algorithm for computing the
frequency spectrum of a time-varying input signal. This line chart
shows the power level of a signal on the channels or frequencies
monitored by a spectrum monitor radio. Spectrum monitors can
show data for multiple channels, while a hybrid AP shows
information only for its one monitored channel. For details, see
Real-Time FFT on page 782.
1 second
Swept
Spectrogram
This plot displays FFT power levels For details, see or the FFT duty
cycle for a selected channel or frequency, as measured during
each time tick. Spectrum monitors can show data for multiple
channels, while a hybrid AP shows information only for its one
monitored channel. For details, see Swept Spectrogram on page
783.
1 second
Spectrum Analysis Clients
The maximum number of spectrum monitor radios and hybrid AP radios on a switch is limited only by the
number of APs on that switch. If desired, you can configure every radio on an AP that supports the Spectrum