Configuring Transmit And Receive Antennas - Cisco ISR Configuration Manual

Configuring Transmit and Receive Antennas

Command
Step 3
no preamble-short
Step 4
end
Step 5 copy running-config startup-config (Optional) Save your entries in the configuration file.
Short preambles are enabled by default. Use the preamble-short command 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:
•
•
•
Beginning in privileged EXEC mode, follow these steps to select the antennas the wireless device uses
to receive and transmit data:
Command
Step 1
configure terminal
Step 2 interface dot11radio { 0 | 1 }
Step 3 antenna receive
{diversity | left | right}
Step 4 antenna transmit
{diversity | left | right}
Step 5
end
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Cisco Wireless ISR and HWIC Access Point Configuration Guide
2-22
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.
Purpose
Disable short preambles and enable long preambles.
Return to privileged EXEC mode.
Purpose
Enter global configuration mode.
Enter interface configuration mode for the radio interface. The
2.4-GHz radio is radio 0, and the 5-GHz radio is radio 1.
Set the receive antenna to diversity, left, or right.
For best performance, leave the receive antenna setting
Note
at the default setting, diversity.
Note The Cisco 850 series routers do not support diversity.
Set the transmit antenna to diversity, left, or right.
Note For best performance, leave the transmit antenna
setting at the default setting, diversity.
Return to privileged EXEC mode.
Chapter 2 Configuring Radio Settings
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