8
Before You Begin
Perform a Site Survey
Perform a Site Survey
Before installing the AP, perform a site survey to determine the optimal AP placement or
maximum range, coverage, and network performance. When performing a site survey,
consider the following factors:
■
Data rates
: Range is generally inversely proportional to data rates. The maximum radio
range is achieved at the lowest workable data rate. Higher data rates will generally be
achieved at closer distances.
■
Antenna type and placement
: Proper antenna configuration is a critical factor in
maximizing radio range. As a general rule, radio range is increased by mounting the
radio higher off of the ground with the AP oriented so that the dome is facing down
(for recommended orientation examples, refer to
Figure 4
on page 9). If you are
connecting an external antenna (5GHz only) to the AP, mount the AP so that the external
antenna is pointing down.
■
Physical environment
: Clear or open areas provide better radio range than closed or
filled areas. The less cluttered the operating environment, the greater the wireless
range.
■
Obstructions, building materials, and sources of interference
: Physical obstructions,
such as concrete pillars, steel beams, filing cabinets, buildings, or trees, can block or
hinder wireless communication. Avoid installing the AP in an environment where there
is an obstruction between sending and receiving devices. A number of machines and
electronic devices that emit radio waves – cranes, wireless phones, microwave ovens,
satellite dishes – interfere with and block wireless signals. Building materials used in
construction also influence radio signal penetration. For example, drywall construction
permits greater range than concrete blocks.
For more AP placement guidelines, refer to
“Determine the Optimal Mounting Location
and Orientation”
.
