External Antennas3-23
•Omnidirectional Antennas - Consider these factors when selecting a
location for these antennas:
• Always mount the antenna in a vertical orientation so that the radio
coverage pattern fills the intended horizontal space.
• For optimum coverage, mount the antenna at the center of the area with a
line-of-sight path to all points within the area.
• Avoid mounting next to or near building support columns or other
obstructions that may cause reduced signal or null zones in parts of the
coverage area.
• When mounting outdoors using a mast, make sure that the antenna exte nds
beyond the top of the mast.
•Directional Antennas - Consider these factors when selecting a location for
these antennas:
• For optimum coverage, mount the antenna above any obstructions,
directed at the center of the coverage area sector.
• High-gain directional antennas provide a flattened radio coverage pattern
in the horizontal plane. Use the tilting or articulated mounts to point the
antennas towards the coverage area.
•Outdoor Installation - When installing an antenna outdoors, be sure to
consider these additional factors:
• Always place the antenna away from power and telephone lines
• Make sure that the antenna, any supporting structure, and cables are all
properly grounded.
• For lightning protection, consider using a lightning arrestor immediately
before the cable enters the building.
Warning: Never install an antenna or construct a radio mast near overhead
power lines.
2. Mount the Antenna
Install the antenna in its planned location using the brackets, clips, or other hardware
included in the antenna package.
Refer to documentation included with the antenna for specific information and
installation instructions.
3. Connect Pigtail Cables to the Access Point
Use the pigtail cables that are attached to the antenna, or are included in the
antenna package. If an extension cable is required, please contact a professional
installer who is trained in RF installation and knowledgeable in the local regulations.
Note that diversity antennas have two pigtail cables. A d iversity antenna includes
two internal antenna elements that are identical. Both antenna pigtail cables must be
connected to the access point for correct operation.
Other non-diversity antennas, can be connected to either antenna connector and
then configured for usage using the antenna options in the user interface.