To configure the radio receive or transmit antenna settings, use the antenna command in interface configuration mode. To reset the receive or transmit antenna to its default setting, use the no form of this command.

antenna {receive | transmit} {diversity | left | right}

no antenna

Syntax Description

receive Specifies the antenna that the access point uses to receive radio signals.
transmit Specifies the antenna that the access point uses to transmit radio signals.
diversity Specifies the antenna with the best signal. Default value.
left Specifies to use the left antenna only.
right Specifies to use the right antenna only.

Command Default

The default antenna setting is diversity.

Command Modes

Interface configuration

Command History

Release Modification
12.2(4)JA This command was introduced.
12.4(2)T This command was integrated into Cisco IOS Release 12.4(2)T.

Usage Guidelines

You can select the antenna the wireless device uses to receive and transmit data. There are three options for both the receive and the transmit antenna:

•diversity—This default setting tells the wireless device to use the antenna that receives the best signal. If the wireless device has two fixed (nonremovable) antennas, you should use this setting for both receive and transmit.

•left—If the wireless device has removable antennas and you install a high-gain antenna on the wireless device’s left connector, you should use this setting for both receive and transmit. When you look at the wireless device’s back panel, the left antenna is on the left.

•right—If the wireless device has removable antennas and you install a high-gain antenna on the wireless device’s right connector, you should use this setting for both receive and transmit. When you look at the wireless device’s back panel, the right antenna is on the right.

The Cisco 850 series routers have only one antenna, and do not support diversity.

Examples

The following example shows how to specify the right receive option:

Router(config-if)# antenna receive right

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