Select APs in the left
pane, then in the Wireless AP list, select the Wireless AP for which you want to
modify the properties.
The AP Properties tab
displays Wireless AP information.
Select the Radio 1 tab.
Configure the desired Radio
Mode, and Channel Width.
From the Request a New Channel drop-down menu, select a
channel according to the site channel plan, or request the AP to auto select the
channel from the channel list set in the Channel Plan setting.