Allied Telesis AT-WA7400/EU - Manual (Page 101)

AT-WA7400 Management Software User’s Guide
101
The channel defines the portion of the radio spectrum the radio uses
for transmitting and receiving. Each mode offers a number of channels,
dependent on how the spectrum is licensed by national and
transnational authorities such as the Federal Communications
Commission (FCC) or the International Telecommunication Union
(ITU-R).
The default is Auto, which picks the least busy channel at startup time.
Radar detection
When this option is enabled, if the access point detects military radar
on the same frequency as the 802.11a channel to which the access
point is set, the access point changes to a different channel.
3. Click Update to save your settings