Andrew ES45T - Manual (Page 53)

Step 7
Step 8
Step 9
Step 10
Step 11
Step 12
Step 13
Reflector Center
Plate Assembly
Step 1
53
Installation Procedures
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
202429
Mounting Ring
Hub
49997
Retaining Bar
1/4 x 1-1/2” (38
mm)
Screw, Flatwashers,
Nut and Locknut
(Nylon)
Reflector
49929-2
Center Pad
Capscrew
Hardware
Toward Feed
Window
49964-2
Center Pad
1/4 x 1-1/2” (38
mm)
Screw, Flatwashers,
Nut and Locknut
(Nylon)
Figure 64
ES45T-T Reflector Assembly