62
33.12 Performing Final Readiness Checks - Refer to Figures 3-12 and 3-13 and Table 3-12.
The following procedures should be performed prior to installing either feed counterweights or
antenna counterweights per Sections 3.3.13 and 3.3.14 and should also be accomplished before
antenna operation.
Table 3-12
Telescope Mounting Installation Material
Item Part Number Description Qty.
1. 510714-1 Bracket, Telescope Mounting 1
2. MS51972-1 Nut (1/4-28) 11
3. MS16996-25 Screw (1/4-28 x 1-1/4) 3
4. 174274 Contour Scale 1
5. 9997-42 Washer, Flat (1/4) 22
6. 9974-15 Washer, Split (1/4) 11
7. 822147-1 Telescope-Mounting Assembly 1
8. MS16996-23 Screw (Socket head, 1/4-28 x 0.75) 8
9. 172945 Contour Data sheet 2
3.3.12.1 Antenna Feedhorn Alignment Check - Refer to Figure 3-12.
Note: To avoid disassembly of the waveguide as described in para. (a) this Antenna Feed Horn
Check may be performed prior to installation of waveguide per Section 3.3.10.
a. Disconnect the waveguide run at the upper Feedhom transducer, being careful not to damage the
waveguide or lose mounting hardware or O-ring.
b. Install the telescope assembly on the transducer flange. Ensure that the two pins located 180 degrees
apart on the telescope mounting plate are inserted in mating holes at the top and bottom of the
transducer flange before securing the telescope to the transducer. Take up screws evenly to ensure
that the telescope assembly is flat against the transducer flange.
c. Position the thumbscrew in the center countersunk hole of the five holes lying on an arc on the
telescope bracket and tighten. This faces the telescope directly into the reflector and sights the
telescope toward the center disk on the reflector.
d. Loosen the thumbscrew one turn for slack, push rear (eyepiece) of telescope to the right and re-
tighten thumbscrew.
e. Adjust focus of telescope with two side wheels.
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