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same side (left or right) as the red side of the feed hub. The system planner must advise the antenna installer of the feed and shield position to be used. As the shield is lowered into position, insert a 1/4" (6 mm) thick plywood shim between each point of shield overlap and the reflector. Loosely attach the shield to the reflector with the shield flange bolts so that the nuts are barely threaded onto the bolts. Carefully upack the RF gasket and place it around the shield without stretching it or snagging it on the J-bolt brackets, allowing the gasket to lay on the shims as shown in Figure 3. Make sure that each gasket clip fully engages a shield flange bolt. Insert a screwdriver between a gasket clip and the reflector on both sides of a shim. Pry up the shield |
slightly and pull out the shim. Tuck the protruding part of the gasket into place before lowering the shield and removing the screwdrivers. Tighten the shield flange bolts while forcing the gasket clips against them with a screwdriver. Next, tighten the shield splice-block bolts. Finally, tighten the shield overlap bolts. Check the plastic fasteners that hold the RF absorber in place. Replace fasteners that have snapped off during assembly with the spares provided. according to the instructions packed with the feed. Also verify the required feed orientation with the system planner. Keep the antenna upright for mount attachment. |