User's Manual

4-4
Using an External Antenna with the Access Point 420
Installation Procedures
Using an External Antenna
with the Access Point 420
• 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
extends 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 immedi-
ately 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 profes-
sional installer who is trained in RF installation and knowledgeable in the local
regulations.