Cisco Systems OL-6415-04 manual Configuring Transmit and Receive Antennas, Antenna receive

Chapter 2 Configuring Radio Settings

Configuring Transmit and Receive Antennas

	Command	Purpose
Step 3
	no preamble-short	Disable short preambles and enable long preambles.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

Short preambles are enabled by default. Use the preamble-shortcommand to enable short preambles if they are disabled.

Configuring Transmit and Receive Antennas

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 (non-removable) antennas, you should use this setting for both receive and transmit.

•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.

•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.

Beginning in privileged EXEC mode, follow these steps to select the antennas the wireless device uses to receive and transmit data:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface dot11radio { 0 1 }	Enter interface configuration mode for the radio interface. The
		2.4-GHz radio is radio 0, and the 5-GHz radio is radio 1.
Step 3
	antenna receive	Set the receive antenna to diversity, left, or right.
	{diversity left right}	Note For best performance, leave the receive antenna setting
			at the default setting, diversity.
		Note		The Cisco 850 series routers do not support diversity.
Step 4
	antenna transmit	Set the transmit antenna to diversity, left, or right.
	{diversity left right}	Note For best performance, leave the transmit antenna
			setting at the default setting, diversity.
Step 5
	end	Return to privileged EXEC mode.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

Cisco Wireless ISR and HWIC Access Point Configuration Guide

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