D-Link AC1750 User Manual page 96

Section 5 - Configuration - Extender Mode - Access Point
Channel Width Select Auto 20/40/80 if you are using 802.11ac, 802.11n, and 802.11a
(5 GHz):
devices, select Auto 20/40 if you are using 802.11n and 802.11a
devices, or select 20 MHz if you are only using 802.11a devices.
HT20/40 Enable or disable HT20/40 Coexistence.
Coexistence:
Visibility Status: The default setting is Visible. Select Invisible if you do not want to
broadcast the SSID of your wireless network.
Schedule: Use the drop-down menu to select the time schedule that the rule
will be enabled on. The schedule may be set to Always Enable, or
you can create your own schedules in the Schedules section. Refer
to page 98 for more information.
Click Save when you are done.
D-Link DIR-869 User Manual 92