Viewing Spectrum Analysis
The radios on groups of APs can be converted to dedicated spectrum monitors or hybrid APs via the 802.11A and 802.11G radio profiles of the AP group. Individual APs can also be converted to spectrum monitors through the spectrum override profile of the AP.
The spectrum analysis feature requires the RF Radio Frequency. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals. Protect license. To convert an AP to a spectrum monitor or hybrid AP, you must have an AP license and an RFProtect license for each AP on that managed device.
The tab of the > in the WebUI includes the , , and windows.
- : this window displays a list of active spectrum monitors and hybrid APs streaming data to your client, the radio band Band refers to a specified range of frequencies of electromagnetic radiation. the device is monitoring, and the date and time the SM or hybrid AP was connected to your client. This window allows you to select the spectrum monitors or hybrid APs for which you want to view information, and release the connection between your client and any device you no longer want to view.
- : this tab displays activity for spectrum monitors and hybrid APs during the current browser session, including timestamps showing when the devices were connected to and disconnected from the client, and any changes to a hybrid APs monitored channel.
- : thiswindow shows different user-customizable data charts for 2.4 GHz Gigahertz. and 5 GHz Gigahertz. spectrum monitor or hybrid AP radios. Table 1 below gives a basic description of each of the spectrum analysis graphs that can appear on the spectrum dashboard.
For more detailed information on these graphs, refer to Customizing Spectrum Analysis Graphs.
|
Graph Title |
Description |
Update Interval |
|
Active Devices |
A pie chart showing the percentages and total numbers of each device type for all active devices. This graph has no set update interval; the graph automatically updates when values change. For details, see Active Devices. |
- |
|
Active Devices Trend |
A line chart showing the numbers of up to five different types of Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. and non‑Wi‑Fi devices seen on selected channels during a specified time interval. This chart can show devices on multiple channels for a spectrum monitor, or the single monitored channel for a hybrid AP. For details, see Active Devices Trend. |
5 seconds |
|
Channel Metrics |
This stacked bar chart shows the current relative quality, availability or utilization of selected channels in the 2.4 GHz Gigahertz. or 5 GHz Gigahertz. radio bands Band refers to a specified range of frequencies of electromagnetic radiation.. This chart can show multiple channels for a spectrum monitor, or the single monitored channel for a hybrid AP. For details, see Channel Metrics. |
5 seconds |
|
Channel Metrics Trend |
A line chart showing the relative quality or availability of selected channels in the 2.4 GHz Gigahertz. or 5 GHz Gigahertz. radio bands Band refers to a specified range of frequencies of electromagnetic radiation. over a specified time interval. Spectrum monitors can show channel data for multiple channels, while a hybrid AP shows information only for its one monitored channel. For details, see Channel Metrics Trend. |
5 seconds |
|
Channel Utilization Trend |
A line chart that shows the channel utilization for one or more radio channels, as measured over a defined time interval. Spectrum monitors can show data for multiple channels, while a hybrid AP shows utilization levels for its one monitored channel only. For details, see Channel Utilization Trend. |
5 seconds |
|
Device Duty Cycle |
A stacked bar chart showing the percent of each channel in the radio frequency band Band refers to a specified range of frequencies of electromagnetic radiation. of spectrum monitor used by a Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. 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. |
5 seconds |
|
Devices vs Channel |
A stacked bar chart showing the total numbers of each device type detected on each channel in the radio frequency band Band refers to a specified range of frequencies of electromagnetic radiation. of the spectrum monitor. 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. |
5 seconds |
|
Fast Fourier Transform, or , is an algorithm for computing the frequency spectrum of a time-varying input signal. This line chart shows the FFT Fast Fourier Transform. FFT is a frequency analysis mechanism that aims at faster conversion of a discrete signal in time domain into a discrete frequency domain representation. See also DFT. 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. |
1 second |
|
|
Interference Power |
This chart shows information about Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. interference, including the Wi-Fi Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. noise floor, and the amount of adjacent channel interference from cordless phones, bluetooth devices and microwaves Electromagnetic energy with a frequency higher than 1 GHz, corresponding to wavelength shorter than 30 centimeters.. 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. |
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 Wi-Fi is a technology that allows electronic devices to connect to a WLAN network, mainly using the 2.4 GHz and 5 GHz radio bands. Wi-Fi can apply to products that use any 802.11 standard. (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. |
5 seconds |
|
Fast Fourier Transform, or , 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. |
1 second |
|
|
Swept Spectrogram |
This plot displays FFT Fast Fourier Transform. FFT is a frequency analysis mechanism that aims at faster conversion of a discrete signal in time domain into a discrete frequency domain representation. See also DFT. power levels For details, see or the FFT Fast Fourier Transform. FFT is a frequency analysis mechanism that aims at faster conversion of a discrete signal in time domain into a discrete frequency domain representation. See also DFT. 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. |
1 second
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