2.4M SERIES 1241 ANTENNA
4096-859
ASSEMBLY MANUAL
REVISION A
Prodelin Corporation
Page 22
8/17/2012
3. FEED SUPPORT
This antenna will accept a variety of feed supports and feed systems. For Feed support installation
instructions, refer to the manuals supplied with the feed support.
4. ANTENNA ALIGNMENT
4.1. Alignment to Satellite
The 2.4M offset reflector contains a 17.35° elevation offset angle. Therefore, when the reflector
aperture is perpendicular to the ground, the antenna is actually looking 17.35° in elevation. The
following alignment procedure is intended only as a general reference guide for this antenna. For
proper antenna performance, accurate alignment is critical. Therefore, it is recommended that your
own detailed procedure be used or contact General Dynamics' Technical Support Department for
additional recommendations.
4.2. Initial Alignment
1) Place an inclinometer on the reflector support as shown in Figure 4. Remember to add 17.35
degrees to the reading to allow for the reflector’s offset angle (or subtract 17.35 degrees if
inverted)
2) Raise or lower the antenna to find the desired elevation by turning the 1" 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 loosening the canister
set screws and spinning the entire reflector assembly until the satellite is located. Tighten the
canister set screws securely.
4) Peak the antenna signal by adjusting elevation and azimuth until optimal signal is achieved.
5) To fine adjust azimuth, loosen the four ¾” bolts in the az/el assembly and turn the 1" nuts
located at the azimuth adjustment.
6) Once optimal signal is obtained, tighten all of the hardware used for adjustments.
Figure 15: Antenna Alignment
Elevation
Adjustment
Azimuth
Adjustment
Place inclinometer on
reflector support
