D-Link DAP-1620B1 User Manual page 31

Section 3 - Configuration
Mouse over the Settings menu at the top of the page and choose the option
Extender from the drop down menu.
In the Existing Network menu, select Wi-Fi and input the Wi-Fi Name (SSID)
and Password manually or click the Scan button to scan for available Wi-Fi
networks to connect to.
Select the Wi-Fi network you would like to extend.
Click Select to continue.
Enter the password of the Wi-Fi network you have chosen.
Click OK to continue.
D-Link DAP-1620 User Manual 28