Andrew 3.7-Meter Earth Station Antenna manual Motorizable Pedestal Ground Mount Assembly Step

Motorizable

Pedestal Ground

Mount Assembly

Step 1

Step 2

Step 3

Step 4

The ground mount assembly enables 180° positioning for selected azimuth viewing. Azimuth range coverage is ±90° divided into three 120° continuous ranges with 30° overlap. Elevation adjustment is continuous from 0 to 90°.

Position and mount 204737 azimuth tiller arm weldment to ground mount assembly as shown using 0.75 x 1.75 in. A-325 bolts and nuts. Tighten hardware per A-325 tension- ing procedure. NOTE: Mounting position of azimuth tiller arm weldment is dependent upon predetermined azimuth range requirements as shown.

Apply supplied stick lubricant to set screw threads. Loosely install 0.50 x 1.0 in. set screws in azimuth and 0.50 x 1.50 in. set screws in elevation strut supports.

Position and mount 204754 elevation support angle assembly to ground mount as shown using 0.50 x 1.75 in. A-325 bolts, flat washers and nuts. Tighten hardware per A- 325 tensioning procedure.

Loosely install supplied 0.75 x 2.00 in. A-325 bolts, flat washers and nuts in elevation support angle assembly. This hardware along with the upper elevation strut hardware will be attached to the antenna and tightened to the A-325 tensioning procedure at the time of antenna installation.

Support Plate

1/2 x 1” Bolt and

3/4” Flat Flat Washer

Washer

3/4” Threaded

Rod

Pivot Block

3/4 x 1-3/4” Bolt and Nut

Figure 3-8b: Ground Mount Assembly Tiller Arm Hardware

EL SPT Angle

Assembly

3/4 x 2” Bolt and Flat Washer (2 Washers per Bolt, one each on Reflector and Mount Side)

AZ Tiller Arm

Weldment

Figure 3-8c: Ground Mount Assembly Elevation Support Angle

22 Installation Procedures