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Mounting the Antenna
This section includes requirements and mounting guidelines for the Enterasys Wireless outdoor
antennas. Each antenna mounting section contains an illustration of the antenna, component
description, and a mounting procedure.
Selecting a Mast
To minimize the influence of obstacles, signal interference or reflections, install the antenna at least
2 meters (6 feet) away from all other antennas.
If you need to mount multiple antennas on a single mast, alternate the mounting of directional
antennas for vertical and horizontal polarization.
In subfreezing conditions, the communications link could fail if an antenna is exposed to ice
buildup or covered with snow.
The mast must satisfy the following requirements:
•
The mast must be constructed of sturdy, weatherproof, noncorrosive material such as
galvanized or stainless steel construction pipe.
•
Antenna mast length must be sufficient to allow an antenna height at least 1.5 meters (5 feet)
above the roof peak. If the roof is metal, the antenna height should be a minimum of 3 meters
(10 feet) above the roof.
Antenna Polarization
It does not matter what type of polarization you choose for your Enterasys Wireless antennas as
long as the antenna at one end of the communications link is mounted in the same plane as the
antenna at the other end.
Vertical polarization is standard for the Enterasys Wireless 14 dBi directional antenna.
To minimize the influence of cross-talk between antennas, you might need to mount the antenna
for horizontal polarization when:
•
Multiple antennas are mounted on the same antenna mast.
•
The wireless link transmissions cross another radio beam from a neighboring installation.
Approved Antennas for the Enterasys Wireless APs
Enterasys APs using certified external antennas must comply with local laws and regulations. An
approval may be required by the local regulatory authorities.
describes the optional antennas that have been tested and approved for use with the APs
compatible with external antennas.
AP2620 Approved Antennas
To mount the antennas on the AP2620, refer to the following sections:
Note: You must supply your own mast on which to mount an Enterasys Wireless antenna.
Enterasys Wireless antennas do not come with masts.
Enterasys Wireless External Antenna Site Preparation and Installation Guide 3-5
Mounting the Antenna
Table 1-9
on page 1-14 lists and
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