D-Link DWL-3500AP Configuration Manual page 17

The power adjustment may be manually triggered by selecting the WLAN tab from the
navigation panel and traversing down to Administration AP Management RF
Management. Select the Manual Power Adjustments tab and then the Start button to
start the process (click the Apply button to apply new power adjustment)
You may change the power of the AP radio by selecting the Radio tab of the Basic
Setup and changing the Initial Power to the desired setting and click on submit.
Note: Any changes to the radio setting must be applied to the AP. To do this, click
Administration Advanced Configuration AP Profiles. Select the profile to apply,
then click Apply to update all APs that use the selected profile.
1.8.4.1 Self Healing Cell Recovery
When a Managed AP is powered down, the power of its neighboring AP(s) managed by
the same switch is immediately increased by 20%. Power Adjustment Mode should be
Interval to see an increase in power of neighboring AP. By default, Initial Power is
100%, so decrease power of APs below 80% or less to see 20% increase before powering
down one AP. The power level can be verified in the Radio detail on the Monitoring
Access Points Managed Access Points page.
Note: A maximum of 3 neighboring APs are adjusted.