Cisco Aironet 340 Series, Hardware Installation Manual

Page: 24 / 132

Chapter 1 Product Overview
Parts of the Client Adapter
1-4
Cisco Aironet Wireless LAN Adapters Hardware Installation Guide
OL-0795-01
Radio Antenna
The type of antenna used depends on your client adapter:
•
PC cards have an integrated, permanently attached diversity antenna. The
benefit of the diversity antenna system is improved coverage. The system
works by allowing the card to switch and sample between its two antenna
ports in order to select the optimum port for receiving data packets. As a
result, the card has a better chance of maintaining the radio frequency (RF)
connection in areas of interference. The antenna is housed within the section
of the card that hangs out of the PC card slot when the card is installed.
• LM cards are shipped without an antenna; however, an antenna can be
connected through the card’s external connector. If a snap-on antenna is used,
it should be operated in diversity mode. Otherwise, the antenna mode used
should correspond to the antenna port to which the antenna is connected.
•
PCI client adapters are shipped with a 2-dBi dipole antenna that attaches to
the adapter’s antenna connector. However, other types of antennas may be
used. PCI client adapters can be operated through the right antenna port only.
Note
Refer to the Cisco Aironet Wireless LAN Adapters Software
Configuration Guide for information on setting the client adapter’s
antenna mode.
Note
External antennas used in combination with a power setting
resulting in a radiated power level above 100 mW equivalent
isotropic radiated power (EIRP) are not allowed for use within the
European community and other countries that have adopted the
European R&TTE directive or the CEPT recommendation Rec 70.03
or both. For more details on legal combinations of power levels and
antennas in those countries, contact Cisco Corporate Compliance.
See also the “Declaration of Conformity with Regard to the R&TTE
Directive 1999/5/EC” section on page C-4.