Wi-Fi Array144 Viewing Status on the Wi-Fi ArraySpectrum AnalyzerSpectrum analysis on Wi-Fi Arrays is a distributed capability that automaticallycovers the entire Wi-Fi network, since a sensor is present in every unit. Arraysmonitor the network 24/7 and analyze interference anywhere in the networkfrom your desk. There’s no need to walk around with a device as with traditionalspectrum analyzers, thus you don’t have to be in the right place to find outsidesources that may cause network problems or pose a security threat. The Arraymonitors all 802.11 radio bands (a/b/g/n), not just those currently used for datatransmission.The RF Spectrum Analyzer window displays instantaneous traffic statistics andRF readings for all channels, as measured by the Array’s abg(n)2 radio. Thisdiffers from the RF Monitor-IAPs window, which displays values measured byeach IAP radio for its current assigned channel. For the spectrum analyzer, theabg(n)2 radio is in a listen-only mode, scanning across all Wi-Fi channels. Eachchannel is scanned in sequence, for a 250 millisecond interval per channel. Thespectrum analyzer window presents the data as a graphical display of vertical bargraphs for each statistic as shown in Figure 79 (the default presentation), orhorizontally as bar graphs or numerical RF measurements. The measurementsdisplayed are explained in “Spectrum Analyzer Measurements” on page 146.As an aid to viewing data for a particular channel, click the channel number. Thechannel will be highlighted down the page (or across the page for a rotated view,in both text and graph modes). Click additional channels to highlight them foreasy comparison. To remove the highlighting from a channel, click the channelnumber again. Click Refresh to update the information at any time. Click AutoRefresh to instruct the Array to refresh this window automatically. The RF measurements for this feature are obtained by IAP abg(n)2, whichmust be set to monitor mode for any data to be available. See “IAPSettings” on page 255.
