Cisco Cisco Aironet 340 Ethernet Bridges 사용자 가이드

The following section provides general guidelines on factors that 
influence infrastructure performance.

Because of differences in component configuration, placement, and 
physical environment, every infrastructure application is a unique instal-
lation. Before installing the system, users should perform a site survey 
in order to determine the optimum utilization of networking components 
and to maximize range, coverage and infrastructure performance. 

Here are some operating and environmental conditions that need to be 
considered:

n Data Rates. Sensitivity and range are inversely proportional to data 

bit rates. The maximum radio range is achieved at the lowest work-
able data rate. There will be a decrease in receiver threshold as the 
radio data rate increases.

n Antenna Type and Placement. Proper antenna configuration 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 configurations along 
with guidelines on selecting antennas for specific environments, see the 
Aironet Antenna Guide, document number 710-003725.

n 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.

n Obstructions. A physical obstruction such as shelving or a pillar 

can hinder the performance of the bridge. Avoid locating the com-
puting device and antenna in a location where there is a barrier 
between the sending and receiving antennas.

n Building Materials. Radio penetration is greatly influenced by the 

building material used in construction. For example, drywall con-
struction allows greater range than concrete blocks.