MRV Communications TERESCOPE TS800/155 - Manual (Page 27)

M R V C o m m u n i c a t i o n s , I n c . – I n s t a l l a t i o n M a n u a l
17
Site Survey
The first step before every installation is to visit the sites to be linked. 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
A necessary condition for linking two distant buildings is that the two mounting
sites must be within clear sight of each other.
Pay attention to:
%
Growing vegetation and increasing
foliage during spring
%
Building sites (cranes movements, etc.)
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Chimneys (intervening smoke can
interrupt the beam from time to time).
Orientation
Direct sunlight can overload the airlink receiver to saturation level. Avoid, as far as
possible, the East-West direction for the 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 very rigid (preventing
the installation from twists of even as little as 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