User's Manual

4-12
Cisco 3200 Series Wireless MIC Software Configuration Guide
OL-7734-02
Chapter 4 Configuring Radio Settings
Configuring Transmit and Receive Antennas
You cannot configure short or long radio preambles on the 5-GHz radio.
Beginning in privileged EXEC mode, follow these steps to disable short radio preambles:
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 WMIC uses to receive and transmit data. There are three options for both
the receive and the transmit antenna:
• Diversity—This default setting tells the WMIC to use the antenna that receives the best signal.
• Right—If you install a high-gain antenna on the right connector and no antenna on the left
connector, you should use this setting for both receive and transmit.
• Left—If you install a high-gain antenna on the left connector and no antenna on the right connector,
use this setting for both receive and transmit.
Note The antenna commands are not available for bridges equipped with a captive (internal) antenna.
Beginning in privileged EXEC mode, follow these steps to select the antennas the access point uses to
receive and transmit data:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio 0 Enter interface configuration mode for the radio interface.
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.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface dot11radio 0 Enter interface configuration mode for the radio interface.
Step 3
antenna receive
{diversity | left | right}
Set the receive antenna to diversity, left, or right.
Note For best performance, leave the receive antenna setting
at the default setting, diversity.
Step 4
antenna transmit
{diversity | left | right}
Set the transmit antenna to diversity, left, or 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.