LaserBit Giga Series 4.3 page
21
7.3 Distance measurement
Because the units were designed, and calibrated for certain distance operations the
higher distance will decrease the availability. Laserbit 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.
7.4 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.
8 Eye
safety
There are no two installation spots of the same kind, the buildings or structures, the
available space and the accessibility of the place will be different in each case.
Nevertheless, as a general rule it is very important to select the installation site so
that nobody can look directly into the transmitter. For this reason place the head
either so high (on the side wall of the building) or so close to the edge of the building
(on a parapet on the rooftop) that no person can approach it accidentally and can
get into the beam path. Set up barriers if necessary and put warning signs at
prominent places.
The laser heads are provided with all labels and hazard warnings required by the
laser standard. There are warning labels on both the left and right side of the
protective cover next to the optical window and there is a warning and an informative
label on the rear side of the laser head.
