3e Technologies International AirGuard 3e-525C-2, User Manual

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3e–525C–2 Wireless Access Point Chapter 2: Hardware Installation
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3e–525C–2 Wireless Access Point Chapter 2: Hardware Installation
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The equation of the width of Fresnel Zone is:
Where
W = Width of the Fresnel Zone (in feet)
D = Distance between the antennas (in miles)
F = Frequency in GHz
When the transmit distance of RF signal is longer than seven miles,
the curvature of the earth may be a factor and require the antenna put at
higher location. The additional antenna height can be calculated by below
formula:
Where
H = Height of earth bulge (in feet)
D = Distance between antennas (in miles)
Outdoor Protection Kit Installation
If any portion of this assembly, either the 3e–525C–2 unit or any at-
tached antenna, is to be used outside, the proper Outdoor Protection Kit
must be installed. This kit contains lightning arrestors for each antenna
and the required cabling to connect these items to the common grounding
stud on the 3e–525C–2 unit.
NOTE : You (the user) are required to ensure that the connection to a
proper earth ground is made by properly certified and authorized person-
nel and must conform to all applicable codes and regulations. The materi-
als required to connect to a proper ground are defined by local conditions
and must be procured locally to ensure the correct safety environment is
achieved. The cable used to connect to a proper ground must be AWG 10
or heavier. This cable should be kept as short as possible.
! WARNING
Do not attempt to install any outdoor equip-
ment during hazardous conditions such as a
thunderstorm, where lightning could strike the
equipment or installer. Failure to follow this
warning could result in injury or death.