772| Spectrum Analysis AOS-W 6.5.3.x| User Guide
Channel Summary Table
The channel summary table provides a summarized or aggregated view of key statistics. Spectrum monitors
display spectrum analysis data seen on all channels in the selected band, and hybrid APs display data from the
one channel they are monitoring. The example in Figure 125 below shows that a spectrum monitor sees 44
Valid APs and 52% channel utilization on channel 40 in the 5GHz radio band.
Figure 125 Channel Summary Table
Spectrum monitor radios using the 5 GHz radio band can display channels using either 20 MHz or 40 MHz
channel numbering. Spectrum monitor radios that support 802.11ac can also display 80MHz channels. To
toggle between these channel numbering modes, click the down arrow in the upper right corner of the graph
titlebar, then click either Show 20 MHz Channels, Show 40 MHz Channels or Show 80 MHz Channels .
Click any of the column headings to sort the information in the table by that column criteria. Make a column
wider or narrower by clicking the border of a column heading and dragging the border to a new position.
Table 169 describes the output of the Channel Summary table.
Parameter Description
Channel Radio channel being monitored by the spectrum monitor or hybrid AP
Valid APs Number of known APs seen on the network.
Not Valid APs Number of unknown or invalid APs seen on the network.
Non Wi-Fi Devices Number of Non-Wi-Fi (interfering) devices detected/classified by the
spectrum monitor.
Center Freq. (GHz) Center frequency of the Wi-Fi signals sent on that radio channel.
Channel Util. (%) Percentage of the channel currently being used by devices on the network.
Max AP Power (dBm) Signal strength of the AP that has the maximum signal strength on a
channel.
Max Interference (dBm) Signal strength of the non-Wi-Fi device that has the highest signal strength.
SNIR (dB) The Signal-to-Noise-and-Interference Ratio (SNIR) is the ratio of signal
strength to the combined levels of interference and noise on that channel.
This value is calculated by determining the maximum noise-floor and
interference-signal levels, and then calculating how strong the desired
signal is above this maximum.
Table 169: Channel Summary Table Parameters
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