D-Link Xtreme N Duo DAP-1522 User Manual page 18

Section  - Configuration
Enter a network name and select Automatically assign
a network key.
To Manually assign a network key, skip to page 19.
Click Next to continue.
If you choose WPA-PSK encryption, the following screen
will show you your Network Key to enter on your wireless
clients.
Click Save to finish the Setup Wizard.
D-Link DAP-15 User Manual 1