4096-757 - General Dynamics SATCOM Technologies

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General DynamicsSeries 1385 - 3.8M Rx/Tx Antenna SystemC4 Systems 4096-7574.3.2. Feed Assembly (Ku-Band)The following text and figures describe the steps required to install Ku-Band Linear Feeds:Figure 29: Ku-Band Feed AssemblyItem 3Item 4ODU(separate)Item 1Item 21. Attach the feed horn (item #1) to theODU using the six #6-32 x .50” screws,lock washers, and o-ring provided, items2 - 4. Apply silicone grease to o-ringbefore assembly. See Figure 29, Ku-Band Feed Assembly. Tighten securely.2. Refer to any additional instructions thatmay be included with the feed supportsystem for the particular antenna systemor refer to the instructions supplied bythe system integrator or electronicsmanufacturer to complete the feedinstallation.23
General DynamicsSeries 1385 - 3.8M Rx/Tx Antenna SystemC4 Systems 4096-7575. Antenna Pointing5.1. Alignment to the SatelliteGeneral Dynamics recommends that a trained or experienced installer align the 3.8-meter Az/El to thesatellite orbital arc. We intend these instructions in section 5.1 to be an overview of the alignmentprocedure.5.2. Initial AlignmentThe 3.8 meter offset reflector has a 22.62-degree elevation offset look angle. Therefore, when the reflectoraperture is perpendicular to the ground, the antenna look-angle is 22.62 degrees in elevation.The following steps summarize how to align the antenna initially:1. Raise the antenna by turning the 2" nuts on the elevation rod assembly.2. After the correct elevation angle is set, rotate the antenna in the azimuth plane by loosening the 2" nuton top of the positioner and removing the 1" hardware (4 places) in the positioner plate, refer to Figure34, Antenna Alignment Hardware Overview.3. At this time, rotate the antenna in azimuth by turning the 1" nuts located at the azimuth adjustmenttube. Rotate the antenna in the azimuth plane until you acquire a signal.4. Peak the antenna by fine adjustments made in both the elevation and the azimuth.5. Adjust polarization by rotating the feed assembly in its mounting bracket.6. Re-install the 1" hardware in the Az/El positioner from step 2 and tighten all adjustment hardwaresecurely.24
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4096-757 - General Dynamics SATCOM Technologies

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