GeoDesy FSO Pluto Mobility - Manual (Page 12)

GeoDesy Kft. Telefon: 06-1-481-2050
H-1116 Budapest, Kondorfa str. 6-8. Fax.: 06-1-481-2049
E-mail: [email protected]om
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12
Horváth Holding
Investment PLC.
wherever is possible. Do not fix stands to insulating materials as they can slowly
sink under the weight of the unit and with temperature changes. Big chimneys and
smokestacks may look stable, but as their inner temperature varies they can also
move. Vibration caused by heavy traffic, trains and elevators etc. may slowly move
the system out of its specified direction. Another important consideration is to
provide enough space for alignment and to have the potential for future
maintenance. Consider that the support frame is usually heavy, so the selected spot
should be easily accessible. It is not only the building that has to be solid, but the
support structure too. Antenna poles and security camera holders are not suitable
for the Laserbit units.
4.3 Distance measurement
Because the units were designed, and calibrated for certain distance operations the
higher distance will decrease the availability. GeoDesy FSO pre-calibrates and pre-
tests every unit shipped to the customer. To ensure that the unit you are about to
buy fits to the needs, the first step is
to measure the distance. The best
way to measure it is by GPS (Global
Positioning System), these
units are accurate enough
to determine the distance
between two points. For
more details please refer to
the GPS manufacturer
handbook. Also there are
several other ways to
measure the distance. If you know the
exact address you can use mapping
software like MapPoint or Auto route.
4.4 Direct sunshine
To prevent the sun
shining directly into the
receiver optics, first one
has to determine the
orientation of the link.
Try to avoid East-West
orientation wherever it
is possible. Examine
both sides of the link at
sunset and sunrise and find a position where the sun cannot get behind any of the
heads. Be aware that the path of the sun is changing throughout the year.