Brocade Enterprise Wireless LAN Antenna Specification Guide, Version 1.5 User Manual
Page 98
86
Enterprise Wireless LAN Antenna Specification Guide
53-1001881-01
Configuring the AP 7131 Series Transmit Power
10
For the 5.2 GHz radio, specify A and N, A Only or N Only to define whether the 802.11a/n radio
transmits in the 5.2 GHz band exclusively for 802.11a clients, 802.11n clients or transmits in
the 5.2 GHz band for both 802.11a/n clients.
The rates for the access point’s 5.2 GHz radio are:
•
A Only Allows 11a rates
•
N Only Requires basic MCS rates
•
A and N Allows only 11a basic rates (default setting)
13. For this example, leave the Channel Width at 20/40 and set the Channel to User selected for
both the 802.11 b/g/n and 802.11 a/n radios.
20/40 MHz operation (the default setting for the 5 GHz radio) allows the access point to
receive packets from clients using 20 MHz of bandwidth while transmitting a packet using 40
MHz bandwidth. This mode is supported for 11n users on both the 2.4 and 5 GHz radios. If an
11n user selects two channels (a Primary and Secondary channel), the system is configured
for dynamic 20/40 operation. When 20/40 is selected, clients can take advantage of “wider
channels.” 802.11n clients experience improved throughput using 40 MHz while legacy clients
(either 802.11a or 802.11b/g depending on the radio selected) can still be serviced without
interruption using 20 MHz.
User selected is the default Channel Selection setting. If 20/40 MHz is selected as the
Channel Width (supporting 11n), the Secondary Channel drop down menu becomes enabled.
The user must define the primary channel first. Then, depending on the primary channel
defined, the secondary channel list is filled with channels making the combination of primary
and secondary channels valid. The actual channels available depend on regulatory domain
requirements.
14. Set the Power Level in respect to the antennas deployed and the defined channel.
NOTE
If you set the transmit power too high (in relation to FCC transmit requirements), the access
point will display an Input Error message stating the maximum power level for the selected
channel has been exceeded.
15. Select Status and Statistics > Radio Stats > Radio1(802.11b/g/n) Statistics or Radio2
(802.11a/n) Statistics from the access point menu tree.
Refer to the Current Channel parameter from within the Information field. This value displays
(in red) the two channels utilized as a result of selecting 20/40 as the Channel Width. The first
value represents the channel utilized for the 20 MHz bandwidth and the second value
(displayed in parenthesis) is the channel supporting 40 MHz.
Supported Antennas by Band, Model, Rate and Transmit Power
Refer to the following Brocade AP 7131 supported antennas for their US Regulatory Domain
transmit power (in both the 2.4 and 5.2 GHz bands), rates and supported channels.
“US Regulatory Domain 2.4 GHz Band”
•
•
“Yagi Antenna Maximum Conducted Transmit Power Settings”
•
•