Andrew 174100, Installation And Maintenance Manual

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f. If telescope cross lines fall within the scribed circle on the center disk, loosen the thumbscrew and
check left sight disk and right sight disk, using steps d. and e., for fine adjustment of the telescope
position.
g. If three disks line up, the Feedhorn is correctly aligned, but if cross lines do not line up confirm
data before contacting the supplier.
h. Remove the telescope assembly and reassemble the upper waveguide run to the transducer.
Remember to insert O-ring between flanges and to tighten mounting screws evenly.
3.3.12.2 Contour Damage Check - To check reflector curvature for damage during shipment, check the
reflector surface against contour measurements previously made at the supplier=s antenna range
for the specific reflector. This information is provided in the contour dada sheet (172945)
supplied with the Telescope Mounting Kit (174277). The data includes measurement data from
selected points located on the surface of the reflector to an imaginary plane parallel to the
reflector. Two men are required for contour measurements. One person must sight through the
telescope to view a measuring scale held at cardinal points by the other person. Refer to Figure 3-
12 and Table 3-12 for these procedures.
a. Attach telescope mounting bracket (1) to the left end of the reflector assembly (viewed from the rear)
with screws (3), split washers (6), flat washers (5) and a nut (2). Before tightening screws ensure that
the two pins in the mounting bracket are firmly inserted in mating holes in the plate which is riveted
to the end rib of the antenna.
b. Attach the telescope and mount assembly (P/N 822147-1) to the telescope mounting bracket (1) with
screws (8), split washers (6) and flat washers (5). Before tightening the screws ensure that the two
pins in the telescope and mount assembly are firmly inserted in mating holes in the telescope
mounting bracket.
c. Locate selected cardinal point on the rib and press end of measuring scale rule (174274) against the
hole drilled in the edge of the rib. Rotate the telescope in vertical plane to sight rule measurement
with cross lines. Make all readings with telescope thumbscrew seated in one of the five countersunk
holes. At each position, before taking the reading, loosen the thumbscrew, push the telescope
eyepiece up and re-tighten the thumbscrew.