18
without legacy compatible part. But the device receives and
decodes both Green Field and legacy packets.
Channel Bandwidth
This option only works when selecting Band mode in
802.11b/g/n Mixed mode. Click the radio button to choose
between 20 MHz or 20/40MHz. This option affects the Phy
data rate of radio. Please refer to the table below
Guard Interval
The 11n device inserts the Guard Interval into the signal.
You can choose the interval between “Long” and “Auto”.
This option affects the Phy data rate of radio. Please refer
to the table below.
MCS
It is Modulation Coding Scheme. The available options are
“Auto, 0, 1, …, 32”. It changes the modulation of this device
and effect the maximum Phy data rate. We recommend
“Auto” setting. For the details, please refer to the table
below.
Reverse Direction
Grant (RDG)
This is the 11n performance parameter. Enable it if needed.
Extension Channel
The “20/40” bandwidth mode uses 5 channels. For
example, selecting channel 7 and you can select 3 or 11 for
extension channel. Choose the unused channel for the
extension channel.
Aggregation MSDU
(A-MSDU)
The multiple HT packets can be transmitted with single
ACK reply packet. Enable it to apply this function and
reduce the network congestion.
Auto Block ACK
It is another aggregation technique which prevents sending
ACK in the communication to increase the throughput. If
this option is enabled, the device will activate this function
when transmitting massive data.
Decline BA Request
Enable this option to decline the Block ACK request
addressed by the other devices.
The table below shows the relationship among Phy data rate, Bandwidth and Guard
Interval.
Bandwidth = 20MHz
Bandwidth = 40MHz
Data Rate
Mbps
MCS
Short Guard
Interval
Long Guard
Interval
Short Guard
Interval
Long Guard
Interval
0 (1S)
7.2
6.5
15
13.5
1 14.4 13
30 27
2 21.7 19.5 45 40.5
3 28.9 26
60 54
4 43.3 39
90 81
5 57.8 52
120
108
6 65 58.5 135
121.5
