Andrew ES45T - Manual (Page 43)

Elevation and
Azimuth
Adjustments
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
43
Installation Procedures
Proper antenna pointing requires specific coarse and fine elevation and azimuth strut
length adjustments which can be determined using the graphs provided in Appendix F.
Adjustable azimuth and elevation struts are initially set in coarse setting as near as pos-
sible to pre-determined lengths. Fine elevation and azimuth settings are accomplished
with threaded rod on elevation and azimuth struts.
CAUTION
Never loosen strut set screws and fine adjustment assembly U-bolts simultaneously.
Doing so may result in severe bodily harm and equipment damage.
Coarse Elevation Adjustment. Station at least two installers at reflector rim to provide
temporary reflector support while third installer loosens two U-bolts on each end of ele-
vation pivot assembly (P/N 49635) and removes 3/4 x 4-1/2 inch (114 mm) bolt, lock-
washer and nut connecting elevation strut to bottom of main triangle assembly. Carefully
lower reflector to vertical position.
Determine required length of elevation strut to nearest degree increment of desired ele-
vation setting. Adjust coarse elevation setting by withdrawing secondary and, if neces-
sary, tertiary strut sections from primary strut to achieve required strut length. Install
eight 1/2 inch (13 mm) set screws in holes provided and securely tighten.
Note: Do not extend secondary or tertiary strut sections into red warning areas.
Carefully raise reflector and attach elevation strut to bottom of main triangle assembly
using previously removed 3/4 x 4-1/2 inch (114 mm) bolt, lockwasher and nut.
Note: Mechanical means or fine adjustment assembly may be used to achieve elevation
angles greater than 30°.
Coarse Azimuth Adjustment. Loosen to U-bolts on both upper (P/N 49630) and lower
(P/N 49629)azimuth axis joints. Remove 3/4 x 4-1/2 inch (114 mm) bolt, lockwasher and
nut connecting azimuth strut to U-bracket (P/N 49704).
Determine required length of azimuth strut to nearest degree increment of desired
azimuth setting. Adjust coarse azimuth setting by withdrawing secondary strut section
from primary strut to achieve desired strut length. Install four 1/2 inch (13 mm) set
screws in holes provided and securely tighten.
Note: Do not extend secondary strut section into red warning area.
Carefully pivot reflector as required and attach azimuth strut to U-bracket using previ-
ously removed 3/4 x 4-1/2 inch (114 mm) bolt, lockwasher and nut.
Note: Apply grease (P/N 49208) around bottom area of lower azimuth axis joint assem-
bly (P/N 49629) before changing azimuth position of antenna.
ES45T-R Reflector Assembly