Brocade Communications Systems Mobility 7131 Series Service Manual download pdf (Page 182)

170 Brocade Mobility 7131 Access Point Product Reference Guide

53-1002517-01

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.

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Brocade Communications Systems Mobility 7131 Series Service Manual Page 182

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