ViaSat 8016, Installation And Operation Manual

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Chapter 1 - General Information
required sighting angles for any satellite are given in look-up tables which
are readily available.
The mount consists of a 20-foot-tall structural tube that is supported at the
top by two diagonal leg braces, 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. The actuator
locations are very convenient to access for maintenance.
Grounding cables are provided to ensure system electrical grounding
between the antenna reflector and the antenna mount structure. Tapped
holes are provided in the mount base plates for attachment to a suitable
foundation grounding system.
Included as optional equipment on the mount is a ladder and work platform
assembly. These components provide safe and convenient access to the feed
electronics inside the antenna hub and to the elevation drive motor for
servicing and inspection. The ladder and platform are designed to be fully
compatible with OSHA specifications.
The Model 8132-M Elevation Actuator (manual drive), the Model 8132-1
(single speed) and Model 8132-3 Elevation Actuator (variable speed) will
provide elevation coverage of 0-degree to 90-degrees.
The Model 8133-M Azimuth Actuator (manual drive), the Model 8133-1
(single speed) and Model 8133-3 (variable speed) Azimuth Actuator will
provide azimuth coverage of 180-degrees through three available 120-degree
overlapping sectors. The selecting of alternate sectors can be accomplished
within two hours by moving the azimuth actuator to an alternate position on
the foundation. These actuators are used only with the Model 8020-120
Mount.
The Model 8133-180-1 Azimuth Actuator (single speed drive) and the Model
8133-180-3 (variable speed drive) provide continuous azimuth coverage of
180° and must be used with the Model 8020-180 Continuous Azimuth
Coverage Mount. These actuators are used only with the Model 8020-180
Mount.
Manual drive elevation and azimuth actuators are operated manually or with
an auxiliary power source such as a drill motor. Motor drive actuators may
also be operated manually if required.
The Model 8084-180 and Model 8084-120 foundations are an essential part of
the antenna installation. The foundation should be oriented so that the
desired pointing angles can be achieved and accurately maintained under
maximum wind loads.
The antenna mount is designed to safely support the antenna in winds up to
125 mi/h (201 km/h). The pointing accuracy of the installed antenna is
42S132E
1-3