Welcome to the Aironet 4000 Series Wireless LAN Adapter
Here are some operating and environmental conditions that need to be considered:
•Data Rates. Sensitivity and range are inversely propor- tional to data bit rates. The maximum radio range is achieved at the lowest workable data rate. There will be a decrease in receiver threshold sensitivity as the radio data rate increases.
•Antenna Type and Placement. Proper antenna config- uration is a critical factor in maximizing radio range. As a general guide, range increases in proportion to antenna height.
For a detailed explanation of antenna types and config- urations along with guidelines on selecting antennas for specific environments, see the Aironet Antenna Guide, document number
•Physical Environments. Clear or open areas provide better radio range than closed or filled areas. Also, the less cluttered the work environment, the greater the range.
•Obstructions. A physical obstruction such as metal shelving or a steel pillar can hinder the performance of the PC Card, particularly when using the small Snap- On antenna. Avoid locating the computing device and antenna in a location where there is a metal barrier between the sending and receiving antennas.
•Building Materials. Radio penetration is greatly influ- enced by the building material used in construction. For example, drywall construction allows greater range than concrete blocks. Metal or steel construction is a barrier to radio signals.
