Spectrum Analysis Clients
The maximum number of spectrum monitor radios and hybrid AP radios on a stand-alone controller is limited only by the number of APs on that stand-alone controller. If desired, you can configure every radio on an AP that supports the Spectrum Analysis feature as a spectrum device. A dual-radio AP can operate as two spectrum devices, because each radio can be individually configured as a spectrum monitor or hybrid AP.
A spectrum analysis client can simultaneously access data from up to four individual spectrum device radios. Each spectrum device radio, however, can only be connected to a single client WebUI.
When you select a specific spectrum monitor or hybrid AP radio to stream data to your client, the stand-alone controller first verifies the device is not subscribed to some other client. Once the SM or hybrid AP radio has been verified as available, the SM or hybrid AP establishes a connection to the client and begins sending spectrum analysis data either every second or every five seconds, depending on the type of data being requested. Each client may select up to twelve different spectrum analysis charts and graphs to appear in the spectrum dashboard.
A stand-alone controller can support up to 22 active WebUI connections. If spectrum analysis clients are simultaneously viewing data for more than 22 WebUI connections, any additional WebUI requests are refused until some clients close their WebUI browser sessions.
When you finish reviewing data from an SM or hybrid AP, you should disconnect the device from your spectrum client. Do not forget this important step—no other user can access data from that spectrum monitor or hybrid AP until you release your subscription A business model where a customer pays a certain amount as subscription price to obtain access to a product or service.. Note, however, that when you disconnect a spectrum monitor from your client, the AP continues to operate as a spectrum monitor until you return it to AP mode by removing the local spectrum override, or by changing the mode parameter in the 802.11A or 802.11G radio profile from spectrum-mode back to AP-mode.
A spectrum monitor or hybrid AP automatically disconnects from a client when you close the browser window you used to connect the spectrum monitor to your client. However, if you use Internet Explorer and have multiple instances of an Internet Explorer browser open, the data-streaming connection to the spectrum monitor or hybrid AP is not released until 60 seconds after you close the spectrum client browser window. During this 60-second period, the spectrum monitor is still connected to the client.
When a spectrum monitor or hybrid AP is not subscribed to any client, it still performs all classification tasks and collect all necessary channel lists and device information. You can view classification, device, and channel information for any active spectrum monitor or hybrid AP via the command-line interface of the stand-alone controller, regardless of whether or not that device is sending real-time spectrum data to another client WebUI.
Individual spectrum analysis graphs and charts are explained in detail in Customizing Spectrum Analysis Graphs.
