D-Link DIR-806A User Manual page 210

DIR-806A Wireless AC750 Multi-Function Router
User Manual
Parameter
Bandwidth
TX Preamble
When you have configured the parameters, click the Apply button.
The channel bandwidth for 802.11n devices in 2.4GHz band (the
2.4GHz tab).
20MHz: 802.11n devices operate at 20MHz channels.
40MHz: 802.11n devices operate at 40MHz channels.
20/40MHz -: 802.11n devices operate at 20MHz and 40MHz
channels (the channel is combined with the previous adjacent
channel).
20/40MHz +: 802.11n devices operate at 20MHz and 40MHz
channels (the channel is combined with the next adjacent channel).
The channel bandwidth for 802.11ac devices in 5GHz band (the
5GHz tab).
20MHz: 802.11ac devices operate at 20MHz channels.
40MHz: 802.11ac devices operate at 40MHz channels.
80MHz: 802.11ac devices operate at 80MHz channels.
This parameter defines the length of the CRC block sent by the
router when communicating to wireless devices.
Select a value from the drop-down list.
Long Preamble.
Short Preamble (this value is recommended for networks with
high-volume traffic).
Page 210 of 233
Configuring Device (Access Point Mode)
Description