Brocade Mobility 7131 Access Point Product Reference Guide (Supporting software release 4.4.0.0 and later) - Manual (Page 182)

170 Brocade Mobility 7131 Access Point Product Reference Guide
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Power Level Use the drop-down menu to defines the transmit power of the 802.11a/n or 802.11b/g/n antenna(s). The values
are expressed in dBm and mW.
Antenna Gain Set the antenna gain used with the selected antenna type between 0.00 - 15.00 dBm. The access point’s Power
Management Antenna Configuration File (PMACF) automatically configures the access point’s radio transmit power
based on the antenna type (provided in the CLI), its antenna gain (provided here) and the deployed country’s
regulatory domain restrictions. Once the antenna type and gain are provided, the access point calculates the power
range.
Antenna gain relates the intensity of an antenna in a given direction to the intensity that would be produced ideally
by an antenna that radiates equally in all directions (isotropically), and has no losses. Although the gain of an
antenna is directly related to its directivity, its gain is a measure that takes into account the efficiency of the
antenna as well as its directional capabilities. Brocade Mobility recommends that only a professional installer set
the antenna gain and the antenna type.
Set Rates Click the Set Rates button to define minimum and maximum data transmit rates for the radio.
Use the Basic Rates drop-down menu to select the rates available for either the 2.4 GHz or 5 GHz radio band. The
menu options differ, based on the radio band.
For 2.4 GHz, the following options are available:
• 1 and 2 Mbps
• 1, 2, 5.5 and 11 Mbps (default setting)
• 1, 2, 5.5, 11 and 6, 12, 24 Mbps
• 1, 2, 5.5, 11 and 6, 12, 24 Mbps and MCS 0-7
• 6, 12 and 24 Mbps
• 6, 12 and 24 Mbps and MCS 0-7
• MCS 0-7
For 5 Ghz, the following options are available:
• 6, 12 and 24 Mbps
• 6, 12 and 24 Mbps and MCS 0-7
• MCS 0-7
When a basic rate option is selected (from the drop-down menu), the rates are automatically selected and grayed
out in the
Supported Rates radio boxes. Select remaining rates as needed for additional supported rates.
Enable the Support Short Guard Interval checkbox to set a guard interval (for interference protection) for 20
MHz and 40 MHz channel widths. When enabled, the AP’s radio defines values to enable a packet to be transmitted
with guard interval based on the configuration and capabilities of associated clients. Clients can associate to an
access point regardless of whether they support a short guard interval.
If supporting 802.11n, select a
Supported MCS index (0-15). Set a MCS (modulation and coding scheme) in
respect to the radio’s channel width and guard interval. A MCS defines (based on RF channel conditions) an optimal
combination of 8 data rates, bonded channels, multiple spatial streams, different guard intervals and modulation
types. MUs can associate as long as they support basic MCS (as well as non-11n basic rates).
Click
OK to implement the selected rates and return to the radio configuration screen. Clicking Cancel reverts the
Set Rates screen to the last saved configuration.