ViaSat 8010 Series Operating instructions

Series 8010
7-Meter Earth Station
Antenna Site Preparation
110° and 180° Azimuth Mounts
Site Preparation Manual
Manual Part No. 42S045D
March 2003

Notice
All Rights Reserved
The information contained in this document is proprietary to ViaSat, Inc.
This document may not be reproduced or distributed in any form without
the consent of ViaSat, Inc.
The information in this document is subject to change without notice.
ViaSat, Inc. assumes no responsibility for any errors that may appear in
this document and does not warranty any specific application.
Any product names mentioned herein are used for identification purposes
only, and may be trademarks and/or registered trademarks of their
respective companies.
In all correspondence with ViaSat, Inc. regarding this publication, please
refer to the Manual Part No. on the title page.
Copyright ® 2003 ViaSat, Inc.
All rights reserved. No part of this book may be reproduced in any form
or by any means without permission in writing from ViaSat, Inc.

Table of Contents
Table of Contents
Table of Contents .................................................................................................. iii
List of Tables ........................................................................................................... v
Safety Summary .................................................................................................... vi
General Information ........................................................................................... 1-1
1.1 Introduction to Manual ..........................................................................................1-1
1.2 Site Selection ............................................................................................................1-1
1.2.1 Mechanical Clearance.............................................................................................1-1
1.2.2 Boresight Clearance ................................................................................................1-1
1.2.3 Absence of Signal Interference ..............................................................................1-1
1.3 Foundation Design and Construction..................................................................1-2
1.3.1 Orientation ...............................................................................................................1-2
1.3.2 Power Requirements...............................................................................................1-3
1.3.3 Electrical Grounding...............................................................................................1-4
1.3.4 Control, Power, and RF Cables .............................................................................1-4
1.3.5 Conduit Placement..................................................................................................1-4
1.3.6 Loads and Deflections ............................................................................................1-5
1.3.7 Soil Bearing ..............................................................................................................1-5
1.3.8 Anchor Bolts and Template ...................................................................................1-5
1.3.9 Reinforcing Bars ......................................................................................................1-5
1.3.10 Concrete Strength....................................................................................................1-5
Foundation Installation (110° Mount).............................................................. 2-1
2.1 General......................................................................................................................2-1
2.2 Antenna Considerations.........................................................................................2-1
2.3 Foundation Design Considerations......................................................................2-1
2.4 Foundation Construction .......................................................................................2-2
Foundation Installation (180° Mount).............................................................. 3-1
3.1 General......................................................................................................................3-1
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3.2 Antenna Considerations.........................................................................................3-1
3.3 Foundation Design Considerations......................................................................3-1
3.4 Foundation Construction .......................................................................................3-2
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Table of Contents
LIST OF TABLES
Table 1-1. Power Requirements ...........................................................................................................1-3
Table 1-2. Circuit Breaker Requirements ............................................................................................1-4
42S045D v

Safety Summary
SAFETY SUMMARY
Notice
Any service, adjustment, maintenance, or repair of this product must be
performed only by authorized technical service personnel.
Prior to installation and use of this product review all safety markings and instructions.
When safety precautions or important information is presented in this manual, the
information will normally be presented just prior to the point where the hazard is likely
to be encountered.
The following symbols are used throughout this manual to bring attention to practices,
procedures, and conditions important to the safety of the operator and equipment or to
obtaining desirable results from the equipment.
This symbol warns of electrical shock hazards
to personnel. Failure to comply with the
instructions of such a warning may result in
severe injury or death resulting from electrical
shock.
This symbol warns of non-electrical hazards to
personnel. Failure to comply with the
instructions of such a warning may result in
severe injury or death.
This s
y
mbol warns of hazards to equipment.
Failure to comply with the instructions of such
a caution may result in damage or destruction
of equipment.
This symbol is used to bring attention to
installation grounding requirements.
NOTE
Notes are used to provide clarification, or to
alert the reader of possible erroneous results,
which may occur if a procedure is not
followed as written.
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Chapter 1 - General Information
Chapter 1
General Information
1.1 Introduction to Manual
This manual contains information needed to properly locate and install the
foundation for the 7-meter (7M) earth station antenna (110° and 180° travel).
Chapter 1 provides general information and provides antenna site selection
criteria for the 110° and 180° antenna, Chapter 2 provides the foundation
installation information for the 110° mount, and Chapter 3 provides the
foundation installation information for the 180° mount. All warnings and
cautions should be reviewed before any procedures are performed. Failure
to do so may result in personal injury or equipment damage.
1.2 Site Selection
Selection of the antenna site is one of the most important factors to
considered for trouble-free, high quality signal reception from and
transmission to the desired satellites. For optimal signal reception and
transmission, it is imperative that the antenna site provide the proper
mechanical and boresight clearance, and the absence of signal interference.
1.2.1 Mechanical Clearance
The site must allow clearance for all antenna movements (both azimuth and
elevation) necessary for aiming, commissioning, and maintenance purposes.
Refer to the outline dimensions provided in chapters 2 and 3 for the plan and
elevation views to determine the required clearances.
1.2.2 Boresight Clearance
A clear line-of-sight is required between the antenna and any desired
satellites. There must be no trees, buildings, power lines, fences, or other
obstructions between any desired satellite and any portion of the reflector.
Anything which obstructs the view of the satellite from even a small portion
of the reflector will result in degraded performance.
1.2.3 Absence of Signal Interference
It is critical that the antenna site selected be free of strong microwave or other
signal interference. Microwave systems in the vicinity of an antenna site can
cause interference. If a known source of interference (e.g., a Bell System
microwave tower) is close by, it may be necessary to have a signal survey
performed to determine if the selected site is suitable.
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Chapter 1 - General Information
1.3 Foundation Design and Construction
Antenna foundation preparation is critical to antenna performance. It is
imperative that competent engineering assistance be engaged to assure that
the foundation is properly designed for the local site conditions and building
codes. This applies to the included foundation plans, as well as to any custom
foundation design which may be required.
Since soil and environmental conditions, building codes,
installation practices, and other factors vary among different
localities, those persons installing antenna mounts are
cautioned to secure professional engineering services for the
design and construction supervision of antenna mount
foundations.
The antenna mount anchor bolt orientations and foundation
loads tables are furnished to be used to establish required
dimensions and location of bolts relative to one another and as
a guide to antenna mount characteristics that must be
considered in the professional design of a foundation.
ViaSat does not represent, nor recommend, that any particular
design or size of foundation is appropriate for any particular
locality or installation.
1.3.1 Orientation
The foundation heading establishes the center of azimuth travel of the
antenna, and determines the ability to point the antenna to the desired
satellites. The foundation must be oriented such that the desired satellite
pointing angles can be achieved within the chosen azimuth sector or sectors.
A true north-south reference may be established by reference to:
• a magnetic compass heading (corrected for declination or variation),
or
• a survey from registered benchmarks, or
• a sighting of Polaris (North Star).
The survey should be performed by a qualified surveyor, since it is used to
position the foundation pad and to establish the heading of the foundation
anchor bolt pattern.
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Chapter 1 - General Information
1.3.2 Power Requirements
The power requirements will vary depending upon the options purchased
with the 7-meter antenna. For motorized antenna mounts, ViaSat provides an
internal main breaker/disconnect in the Model 8861 and 8862 Outdoor
Control Units. The service and breaker supplying power to the Outdoor
Control Unit should be at least as large as the internal breaker, which is as
follows:
Table 1-1. Power Requirements
Antenna Motorization - Domestic (60 Hz)
Azimuth Axis 208V ac, 3-phase, 3.2 amp max (single speed-110°)
208V ac, 3-phase, 3.6 amp max (single speed-180°)
208V ac, 3-phase, 17.8 amp max (dual speed)
208V ac, 3-phase, 14.8 amp max (variable speed
110° and 180°)
Elevation Axis 208V ac, 3-phase, 3.2 amp (single speed)
208V ac, 3-phase, 17.8 amp max (dual speed)
208V ac, 3-phase, 14.8 amps max (variable speed)
Polarization Axis 208V ac, 3-phase, 0.24 amp
Antenna Motorization - International (50 Hz)
Azimuth Axis 380V ac, 3-phase, 1.5 amp max (single speed 110°)
380V ac, 3-phase, 2.0 amp max (single speed 180°)
380V ac, 3-phase, 7.7 amp max (dual speed)
380V ac, 3-phase, 7.8 amp max (variable speed
110° and 180°)
415V ac, 3-phase, 7.8 amp max (variable speed
110° and 180°)
Elevation Axis 380V ac, 3-phase, 1.5 amp (single speed)
380V ac, 3-phase, 7.7 amp max (dual speed)
380V ac, 3-phase, 7.8 amp max (variable speed
110° and 180°)
415V ac, 3-phase, 7.8 amp max (variable speed
110° and 180°)
Polarization Axis 380V ac, 3-phase, 0.15 amp
415V ac, 3-phase, 0.15 amp
NOTE
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Chapter 1 - General Information
Table 1-1. Power Requirements
Circuit breaker selection should take into consideration that motor starting amp surge
may be as high as 6 times the full load running current. The combined azimuth and
elevation connections must be completed by an electrical contractor and must meet all
state and local electrical codes
De-Ice System
Full Reflector Power 208V - 240V ac, 3-phase, 21.6 kVa
Half Reflector Power 208V - 240V ac, 3-phase, 10.8 kVa
Feed and Subreflector 208V - 240V ac, 3-phase, 1.0 kVa
Table 1-2. Circuit Breaker Requirements
Antenna Motorization Total 40 amp, 3-phase
Model 8861 single speed 20 amp, 3-phase
Model 8862 variable speed 50 amp, 3-phase
De-Ice System Total 100 amp, 3-phase
Power for antenna de-icing must be considered separately from the
motorized drive requirements above .
1.3.3 Electrical Grounding
Proper electrical grounding shall be provided by the installing contractor to
meet local applicable codes. Depending on local soil conditions, this may take
the form of a buried grid or a suitable copper stake. The antenna mount shall
be electrically connected to the ground.
1.3.4 Control, Power, and RF Cables
Provisions must be made to provide suitable support for control, power, and
RF cables either by buffed conduit or overhead cable tray. Lightening
arrestors must be provided across all cables leaving the antenna per
applicable local codes and N.F.P.A. codes.
1.3.5 Conduit Placement
If underground conduit is to be used for cabling and waveguide, it must be
placed in the foundation prior to pouring the concrete. Power and control
cable conduit should be at least 3 inches [7.6 cm] diameter with at least a 36
inches [91.5 cm] bend radius. Waveguide conduit should be at least 4 inch
42S045D 1-4

Chapter 1 - General Information
[10.2 cm] diameter with at least a 36 inch [91.5 cm] bend radius. Refer to the
individual foundation sections of the manual for specific recommendations
of conduit placement.
1.3.6 Loads and Deflections
The pointing accuracy of the installed antenna is determined by the stiffness
of the antenna and the foundation. The suggested foundation plan for each
mount type has been designed using the stated assumptions with loading
based on the corresponding loads table. The foundation should be designed
for a maximum tilt of 0.1 degrees when the survival wind loads are applied
to the antenna.
1.3.7 Soil Bearing
The minimum safe soil bearing capacity for monolithic foundations shall be
not less than 2,000 lb. per sq. foot [96 kPa], The bottom of the foundation pad
must extend below the frost line.
1.3.8 Anchor Bolts and Template
Anchor bolt locations must be within 1/16 inch [.16 mm] of the dimensions
given. The anchor bolt template kit includes the plates and tie bars necessary
to accurately position all of the anchor bolts for the foundation. The surface
of the concrete foundation at the mount base plates should be level within
0.5 inch [1,2 cm].
1.3.9 Reinforcing Bars
Reinforcing bars shall conform to ASTM A615 grade 60. Do not weld anchor
bolts to reinforcing bars. This will remove the temper and reduce the strength
of the anchor bolts.
1.3.10 Concrete Strength
All concrete shall be building code standard weight 3000 lb. per sq. inch
[20685 kPa] compressive strength at 28 days.
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