4096-224
CPI SATCOM & Antenna Technologies
1.8M SERIES 1184
20
SECTION IV
ANTENNA POINTING
4.0
Alignment To Satellite
CPI's 1.8 meter Az/El mount requires that the antenna be aligned to the satellite
orbital arc initially by a trained installer, after which, any future repointing to a
second satellite can be accomplished quickly and easily by anyone with a minimum
of tools and instruction.
4.1
Initial Alignment
The 1.8 meter offset reflector contains a 22.3
o
elevation offset look angle.
Therefore, when the reflector aperture is perpendicular to the ground, the antenna
is actually looking 22.3
o
in elevation.
1)
Aligning to primary satellite: Attach the inclinometer to the reflector support
ring as shown in figure 4. This surface compensates for the 22.3
o
offset in
the reflector, therefore a direct reading can be taken.
2)
Raise or lower the antenna to find the desired elevation by turning the 3/4"
nuts located at the elevation block. Position the top nut so that it will not
interfere with adjustment. Turn the bottom nut clockwise to increase
elevation and counterclockwise to decrease elevation.
3)
After the correct elevation angle is set, rotate the antenna in azimuth by
turning the 3/4" nuts located at the azimuth adjustment tube. Turn the front
(near reflector) nut to decrease azimuth angle and the back nut to increase
azimuth angle. Rotate azimuth until a signal is reached.
4)
Peak the antenna signal by fine adjustments made in both azimuth and
elevation.
5)
Tighten the four (4) 3/4" nuts used for adjustments.
6)
Mark satellite location: Locate the azimuth and elevation pointers, you will
find a small hole in the end of the pointers, mark the canister plate and the
elevation plate to identify the satellite location.
7)
Aligning to secondary satellite: Loosen the 3/4" nuts on the azimuth
adjustment rod, using the compass rotate the antenna in azimuth to the next
satellite. Snug the 3/4" azimuth nuts at this time.
