Andrew ES76PK-1 Subreflector Centering Step Subreflector Focusing, Step Step

Subreflector Centering

Step 7

Subreflector

Focusing

Step 8

Step 9

Measure and note the distance between outermost subreflector strut support bolt head and the subreflector rim as shown in Figure 25. Obtain corresponding measurements from remaining subreflector struts. These measurements should have a maximum differ- ential of 0.062 in. (1.5mm). If adjustment is necessary, loosen the four floating ring bolts and slide subreflector appropriately to achieve the 0.062 in. (1.5mm) differential. Make sure to re-tighten bolts when finished.

Refer to Figure 25. Use measuring tape to set indicated dimension between bottom edge of panel and subreflector aperature rim at the three subreflector adjustment stud loca- tions. Use subreflector adjustment stud hardware to achieve equal axial dimension of 108.75 in. (2762.3mm) at all three locations. Securely tighten adjustment hardware.

Repeat procedure described in Step 7. If any dimensional variation is found, repeat adjustment procedure described in Step 7 then repeat procedure in Step 8 if required.

39 Installation Procedures