6
CHOOSING WHERE TO INSTALL THE ANTENNA
(continued)
4. Using the angle finder and a carpenter’s level or straight
edge, verify that there is an unobstructed line-of-sight
toward the satellite as shown in the diagram below. To do
this, align the level along the azimuth bearing. Then, using
the angle finder, lift the front end of the straight edge to cor-
respond to the elevation angle you recorded on page 4. Sight
along the straight edge to verify that there are no obstruc-
tions (such as buildings or trees) blocking the view. Take
into account future tree growth; if you install during the fall
or winter, account for spring and summer leaf growth. Also,
avoid installing the antenna next to electrical equipment
such as air-conditioning units, because they can cause signal
interference.
Figure 2
Good View
(Clear line-of-sight, no
obstructions in the way)
Poor View
(Obstructed line-of-
sight, trees are block-
ing the signal)
1
2
3
2
1
90
45
0
4
5
90
45
0
4
5
1
2
3
2
1
90
45
0
4
5
90
45
0
4
5
