TM
GE60 Installation Manual
580-00505, rev 0.4
8 of 30
PRELIMINARY
2 Site
Planning
2.1 General
Before the start of an installation a survey should be conducted of the proposed area of
the site(s). The survey personnel should be fully familiar with the details required to
install the GE60 radio system.
2.2 Equipment Checklist
The survey team will need the following equipment:
•
Binoculars
•
GPS Navigation Device
•
Tape Measure
•
Site Survey Report Form
2.3 Line of Sight (LOS)
The GE60 Wireless Gigabit Ethernet link requires Line-of-Sight for proper operation.
Fortunately, the links are relatively short and obstructions in the path can easily be
identified. Binoculars can ease viewing in poor light conditions.
The planning should include an investigation into future building plans that could block
the LOS path, and other long-term incremental obstructions such as trees. Intermittent
obstructions such as aircraft at a nearby airport should also be considered.
The minimum required clearance from obstacles is 60% of the first Fresnel zone. Fresnel
zones are a series of concentric ellipsoid areas surrounding the straight-line path between
two antennas. The first Fresnel zone is the area containing every point of which the
distance from the transmitter to any reflection point on the area and on to the receiver is
half a wavelength longer than the path of the direct signal. The radius of the Fresnel zone
is greatest at midpoint in the signal path.
)
1
(
005
.
0
)
(
ρ
ρ
−
∗
∗
∗
=
D
meters
arance
MinimumCle
where,
D
= Path distance in meters
ρ
= Distance from antenna as a percentage of path distance
