Specifications

Chapter 1 - General Information
42S315F 1-3
Azimuth sector changes can be accomplished in two hours by disassembling
four bolts, repositioning the azimuth sector bars, and installing the four bolts
in a different hole pattern in the bottom ring of the structural tube. The
elevation axis will cover 0° to 90° in one continuous sector on antennas
without reflector de-icing.
NOTE
With optional hot air de-icing installed, the minimum
elevation angle is 5°.
The Model 8009A mount uses a 20-ton azimuth actuator and 15-ton elevation
actuator. This actuator combination will drive the antenna in a 96 km/h [60
mi/h] wind at the extended actuator condition. The survivability envelope
for the Model 8009A (120°) antenna mount is presented in Figure 1-2.
Survival at 90° elevation (stow) is 201 km/h [125 mi/h].
CAUTION
The ability of the Model 8009A antenna to survive high winds
depends upon the position of the antenna (elevation and
azimuth pointing angles) when high winds occur. Use Figure
1-2 to identify the survivability envelope in which the antenna
must be pointed to protect the azimuth actuator screw from
excessive column loading when winds above 112 km/h (70
mi/h) are expected.
The Model 8009AE 120° and 180° are extreme environment mounts
consisting of a 217 inch [551 cm] tall structural tube that is supported at the
top by two legs which extend to the rear of the antenna. The bottom of the
tube is supported by a pivot bearing and is driven at the ground level
location by the azimuth actuator. The elevation actuator is located atop the
structural tube and behind the reflector hub. A manual actuator, a motorized
single speed actuator and a variable speed actuator is available. Total
azimuth coverage for the Model 8009AE (120°) mount is 180° in three
overlapping 120° continuous sectors. Selecting an alternate sector can be
accomplished within (4) hours by reconfiguring the azimuth actuator location
to a different set of anchor bolts on the foundation.