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MRV Communications, Inc. – Installation Manual
24
Site Survey
The first step before every installation is to visit the sites to be
linked. This in order to make sure that the connection is feasible,
to find out potential obstacles or difficulties and to decide on the
location and mounting points of the transceivers
Line of Sight
An imperative condition for linking two distant buildings is that the two mounting
sites must be within a clear sight of each other.
Pay attention to:
Growing vegetation and increasing
foliage during spring
Building sites (cranes movements, ...)
Chimneys (drained away smokes could
block the beam from time to time).
Orientation
As direct sunlight could overload the airlink receiver and generate its saturation,
avoid as far as possible the East to West path link.
Note
In case this is not possible the surrounding buildings could shield the
transceiver from the direct sunlight otherwise outages lasting several
minutes (depending on the time of the year and the angle of the sun)
could occur. The system will fully recover once the sun is out of the
receiver field of view.
Location & Range
1. The mounting of the transceiver must be extremely rigid
(preventing the installation from twists of 1 mrad). The key to
the required rigidity is to attach the mounting accessories on
strong mounting points such as:
- Stiff building structures
- Concrete or reinforced concrete surfaces
Chapter
2