Dell W-Series 304 Instant 6.5.1.0-4.3.1.0 CLI Reference Guide - Page 1313

show ap spectrum interference-power show ap spectrum interference-power {ap-name }|{ip-addr } freq-band 2.4ghz|5ghz [] Description This command shows the interference power detected by a 802.11a or 80211g radio on a spectrum monitor or hybrid AP. Syntax Parameter ap-name ip-addr freq-band 2.4ghz|5ghz Description Name of the spectrum monitor or hybrid AP for which you want to view spectrum information. IP address of the spectrum monitor or hybrid AP for which you want to view spectrum information. View information for a specific radio type, either 2.4 GHz or 5 GHz. Specify 20MHz or 40MHz to select the channel width for which you want to view information. If you do not specify a channel width, the output of this command will display the default 20MHz setting. Usage Guidelines This table displays information about AP power levels, channel noise and adjacent channel interference seen on each channel by a spectrum monitor or hybrid AP radio. The output of this command displays the noise floor of each selected channel in dBm. The noise floor of a channel depends on the noise figure of the RF components used in the radio, temperature, presence of certain types of interferers or noise, and the width of the channel. For example, in a clean environment, the noise floor of a 20 MHz channel will be around -95 dBm and that of a 40 MHz channel will be around -92 dBm. Certain types of fixed frequency continuous transmitters such as video bridges, fixed frequency phones, and wireless cameras typically elevate the noise floor as seen by the Wi-Fi radio. Other interferers such as the frequency hopping phones, Bluetooth and Xbox devices may not affect the noise floor of the radio. A Wi-Fi radio can only reliably decode Wi-Fi signals that are a certain dB above the noise floor and therefore estimating and understanding the actual noise floor of the radio is critical to understanding the reliability of the RF environment. The ACI column displayed in the Interference Power Chart displays adjacent-channel interference (ACI) power levels based on the signal strength(s) of the Wi-Fi APs on adjacent channels. A higher ACI value in Interference Power Chart does not necessarily mean higher interference since the AP that is contributing to the maximum ACI may or may not be very actively transmitting data to other clients at all times. The ACI power levels are derived from the signal strength of the beacons. Examples The output of this example shows interference power levels for each channel seen by the spectrum monitor ap123. (host)# show ap spectrum interference-power ap-name ap123 freq-band 5ghz Dell Networking W-Series ArubaOS 6.5.x | Reference Guide show ap spectrum interference-power | 1313