Andrew ES45T manual Reflector Center Plate Assembly Step, Step Step Step Step Step Step Step

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Reflector Center Plate Assembly

Step 1

ES45T-T Reflector Assembly

Position measuring rod point down over temporary supports and on the flat portion of the aperture face as shown in Figures 62 and 63, using theodolite/transit/laser level carefully measure and record relative height of each of the (6) temporary support loca- tions. Note: Measuring rod must be held in a vertical position during all measurements.

From the recorded data determine the relative height of each of the locations as com- pared to the highest measured location. The differences between the highest location and a lower location will be the amount of shim material required to place between the reflector and the temporary support.

Shim each location as required to level the reflector (see Figure 63).

Continue to measure around antenna again, recording the height of each location mea- sured. As before, shim the low location points to be at the same elevation as the highest measured location.

Continue to measure, record, compare and shim any low temporary support location points until all (6) temporary location points are within 0.030 inches [0.75 mm] elevation from each other.

Recheck the shim stacks required for leveling the reflector to ensure they are properly positioned and are adequately supporting the reflector. Note: As work continues on the reflector it is essential that the shim stacks remain in position through out this process. Also ensure that diameter setting bands are taut and evenly tensioned. If not, check to ensure proper leveling of temporary supports.

With the reflector level, tighten seam hardware starting at the outer perimeter of match marked position A-A and continue this procedure around reflector in concentric circles while progressing inward toward reflector center. Note: Near center area, it may become necessary to push down on mounting ring hub to narrow segment gap before tightening hardware.

Install center plate (P/N 49964-2) over reflector center opening and retaining bar (P/N 49997) behind reflector center opening as shown using supplied capscrew hardware as shown in Figure 64.

			Reflector			1/4 x 1-1/2” (38
								mm)
					Screw, Flatwashers,
						Nut and Locknut
	202429
	Mounting Ring						(Nylon)
		Hub
					49964-2
					Center Pad
		49997
		Retaining Bar
						Toward Feed
						Window
				Capscrew
				Hardware
1/4 x 1-1/2” (38
		mm)
Screw, Flatwashers,				49929-2
Nut and Locknut				Center Pad
	(Nylon)
				Reflector

Figure 64

53 Installation Procedures