Series Meter Earth Station Antenna Site Preparation 120 and 180 Mounts. Installation and Operation Guide

Transcription

1 Series Meter Earth Station Antenna Site Preparation 120 and 180 Mounts Installation and Operation Guide Manual Part No. 42S042G April 2003

2 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 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.

3 Series Meter Earth Station Antenna Site Preparation 120 and 180 Mounts Installation and Operation Guide

4 TABLE OF CONTENTS NOTE For a further or more detailed breakdown of section contents, refer to the title page of each section. SECTION 1 GENERAL INFORMATION 1-1 Introduction to Manual SECTION ANTENNA SITE SELECTION (120 AND 180 ANTENNA) General Determining Aiming Coordinates Verifying Operational Clearance Verifying Clear Line-of-Site Verifying Absence of Signal Interference Verifying Availability of Power Requirements SECTION FOUNDATION INSTALLATION (120 MOUNT) General Antenna Considerations Foundation Design Considerations Foundation Construction SECTION FOUNDATION INSTALLATION (180 MOUNT) General Antenna Considerations Foundation Design Considerations Foundation Construction 42S042F SERIES METER EARTH STATION ANTENNA ii

5 SECTION 1 GENERAL INFORMATION 1-1 Introduction to Manual 42S042F SERIES METER EARTH STATION ANTENNA

6 SECTION 1 GENERAL INFORMATION INTRODUCTION TO MANUAL This manual contains information needed to properly locate and install the foundation for the 6-meter (6M) earth station antenna (120 and 180 travel).. Section 1 provides general information, Section 2 provides antenna site selection criteria for the 120 and 180 antenna, Section 3 provides the foundation installation information for the 120 mount, and Section 4 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. ViaSat, Inc. makes every effort to ensure that the information contained herein is correct and complete. 42S042D SERIES METER EARTH STATION ANTENNA 1-1

7 SECTION 2 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) 2-1 General 2-1 Determining Aiming Coordinates 2-8 Verifying Operational Clearance 2-13 Verifying Clear Line-of-Sight 2-13 Verifying Absence of Signal Interference 2-13 Verifying Availability of Power Requirements 2-15 Conduit Placement 42S042F SERIES METER EARTH STATION ANTENNA

8 SECTION 2 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) GENERAL One of the most important factors to be considered for trouble-free, high-quality signal reception from desired satellites is the location of the antenna (i.e., the antenna site). For optimal signal reception, it is important that the antenna site selected provides the following: Operational Clearance. The site must allow clearance for antenna movement (both elevation and azimuth) necessary for aiming and maintenance purposes. Clear Line-Of-Sight. The site must allow clearance for antenna to be aimed (pointed) at desired satellite(s) with no obstructions between satellite(s) and any portion of the reflector. Absence Of Signal Interference. The site must be free of strong microwave and other signal interference. In order to evaluate the antenna site selected against the above criteria, the antenna pointing position (i.e., aiming coordinates) for the desired satellite(s) must be determined. The method of determining aiming coordinates for desired satellite(s) and for ensuring that the criteria are met is described below. DETERMINING AIMING COORDINATES The location of each satellite, from which reception is desired, is defined in degrees West Longitude (see Table 2-1). In order to receive signals from a desired satellite, an antenna must be positioned properly (i.e., have the correct elevation and azimuth). The coordinates (degrees elevation and degrees azimuth) used for positioning the antenna are referred to as aiming coordinates. The following procedure, through use of an example, describes the method for determining the aiming coordinates at a selected site for a given satellite. This procedure is used here to evaluate the selected antenna site before the antenna is installed; however, the procedure is also used following antenna installation to accurately aim the reflector at the desired satellite(s). The procedure is described as follows: 1. Using information or maps provided by the FAA or other agency at location of antenna site, determine the position of your selected antenna site. This position must be defined in latitude (degrees North of the equator) and in longitude (degrees West of the 0 Meridian, which runs through London, England). The map in Figure 2-1 shows relative longitudes and latitudes for U.S. locations. For example, Atlanta, Georgia is 33.7 North, 84.4 West. 42S042D SERIES METER EARTH STATION ANTENNA 2-1

9 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-1. U.S. Map Showing Longitude and Latitude 42S042D SERIES METER EARTH STATION ANTENNA 2-2

10 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) 2. Using Table 2-1, obtain the longitude of the satellite(s) that will be used to receive signals. For example, Satcom F3R is 131 West Longitude. Table 2-1. Listing of Longitude for Various Satellites* Location in Location in Satellite Degrees West Satellite Degrees West Longitude Longitude SPACENET II 69 ANIK D SATCOM F2R 72 GSTAR GALAXY 2 74 ANIK C COMSTAR 2&4 76 ANIK C2 110 K2 81 ANIK D SATCOM F4 82 MORELOS K1 85 ANIK C TELSTAR MORELOS SPACENET 3 87 SPACENET WESTAR 3 91 WESTAR SBS 4 91 SBS GSTAR 3 93 TELSTAR GALAXY ASC SBS 3 95 SATCOM F3R 131 TELSTAR GALAXY WESTAR 4 99 SATCOM F1R 139 SBS 1&2 99 AURORA GSTAR *Satellite positions listed are subject to change. These positions represent assignments for a particular time period. 42S042D SERIES METER EARTH STATION ANTENNA 2-3

11 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) 3. Subtract the selected antenna site longitude (determined in step 1) from the satellite longitude (determined in step 2). From the examples listed above, the equation is: = 46.6 difference. NOTE If the difference is a positive number, use the graph given in Figure 2-2 for step 4. If the difference is a negative number, use the graph given in Figure 2-3 for step Using either Figure 2-2 or Figure 2-3, as determined above (see NOTE), perform the following procedure: AZIMUTH ANGLE REFERRED TO TRUE NORTH (FOR SITE IN NORTHERN HEMISHPERE) ELEVATION ANGLE LATITUDE LIMITS OF CONTIGUOUS UNITED STATES SITE LATITUDE POSITIVE DIFFERENCE BETWEEN SATELLITE AND SITE LONGITUDES Figure 2-2. Universal Azimuth-Elevation Look Angles for Positive Differences Between Site and Satellite 42S042D SERIES METER EARTH STATION ANTENNA 2-4

12 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) AZIMUTH ANGLE REFERRED TO TRUE NORTH (FOR SITE IN NORTHERN HEMISHPERE) ELEVATION ANGLE LATITUDE LIMITS OF CONTIGUOUS UNITED STATES SITE LATITUDE NEGATIVE DIFFERENCE BETWEEN SATELLITE AND SITE LONGITUDES Figure 2-3. Universal Azimuth-Elevation Look Angles for Negative Differences a. Along the bottom edge of the graph, mark the point corresponding to the difference number obtained in step 3. In the example above, the point is b. Along the right edge of the graph, mark the point corresponding to the selected antenna site latitude (determined in step 1). The example point is c. As shown in Figure 2-2 (by the example) project these two points upward (from the bottom edge of the graph) and inward (from the right edge of the graph) until these two lines intersect. Mark this point with a circle for reference. d. To determine the elevation aiming coordinate for the antenna, follow the curved lines around to the left and estimate where the reference point determined in (b) above would intersect the left edge of the graph. The example is about 27. NOTE For reference, elevation is measured up from the horizon and azimuth is measured clockwise from the North. 42S042D SERIES METER EARTH STATION ANTENNA 2-5

13 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) e. To determine the azimuth aiming coordinate for the antenna, follow the curved lines upward and estimate where the reference point determined in (b) above would intersect the upper edge of the graph. The example is about When using a compass to locate the azimuth aiming coordinate determined in step 4.e above, it may be necessary to adjust the compass indication (because of magnetic deviation) before pointing the antenna. In the example, the azimuth angle is 242 ; however, from Figure 2-4, Atlanta, Georgia, is about +1 of magnetic deviation from true North. Therefore, to compensate for deviation, add 1 to our azimuth calculation: = 243, which is the actual compass reading to use in pointing the antenna. NOTE The above method should be used in determining the antenna aiming coordinates for both the satellite(s) from which reception is currently desired and for satellite(s) from which reception may be desired in the future. Azimuth and elevation aiming coordinates may also be determined by formula using a digital calculator. In these formulas, X represents the site latitude in degrees, Y represents the site longitude in degrees, and Z represents the satellite longitude in degrees. For the southern hemisphere, enter X as negative. If west longitudes are entered as positive numbers, define the longitude difference as: D = Z - Y If East longitudes are entered as positive numbers, define the longitude difference as: D = Y - Z The constant K is defined as: K = Compute the elevation angle E and the azimuth angle A according to the following formulas: 1 cos Dxcos X K E = tan 2 2 ( sin D) + ( cos D xsin X) A = tan -1 tan D sin X If X>0 (i.e., a northern hemisphere latitude), then add 180 to A to get the angle from true north. Then add the appropriate magnetic deviation angle as described before to obtain the compass heading. 42S042D SERIES METER EARTH STATION ANTENNA 2-6

14 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-4. U.S. Map Showing Magnetic Deviation for Compass Indications 42S042D SERIES METER EARTH STATION ANTENNA 2-7

15 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) VERIFYING OPERATIONAL CLEARANCE Once the antenna aiming coordinates have been determined, it is necessary to verify operational clearance (see Figure 2-5 for 120 and Figure 2-6 for 180 antenna). This ensures that the antenna movement necessary for both aiming and maintenance purposes is not restricted. CAUTION No buildings, walls, fences, or other permanent fixtures should be planned for installation any closer than 2 meters from the antenna and foundation envelope without consultation with the factory. NOTE The rotational limits identified in Figure 2-5 specify clearance requirements for all possible azimuth pointing angles for the 120 antenna. The motorized azimuth pointing angle range is three 120 continuous sectors. These three sectors are: Left Sector: Center Sector: Right Sector: ' left to 5 18' right 60 left to 60 right 6 38' left to ' right The rotational limits identified in Figure 2-6 specify clearance requirements for all possible azimuth pointing angles for the 180 antenna. The motorized azimuth pointing angle range is three 180 continuous sectors. These three sectors are: Center Sector: 90 left to 90 right The manual azimuth pointing range is 360. NOTE No buildings, walls, fences, or other permanent fixtures should be planned for installation any closer than 2 meters of the antenna and foundation envelope without consultation with the factory. 42S042D SERIES METER EARTH STATION ANTENNA 2-8

16 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-5. Clearance Requirements for 6-Meter 120 Earth Station Antenna, B 42S042D SERIES METER EARTH STATION ANTENNA 2-9

17 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-6. Clearance Requirements for 6-Meter 180 Earth Station Antenna (Sheet 1 of 3), A 42S042D SERIES METER EARTH STATION ANTENNA 2-10

18 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-6. Clearance Requirements for 6-Meter 180 Earth Station Antenna (Sheet 2 of 3), A 42S042D SERIES METER EARTH STATION ANTENNA 2-11

19 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Figure 2-6. Clearance Requirements for 6-Meter 180 Earth Station Antenna (Sheet 3 of 3), A 42S042D SERIES METER EARTH STATION ANTENNA 2-12

20 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) VERIFYING CLEAR LINE-OF-SIGHT Once the operational clearance has been verified, it is necessary to verify a clear line-of-sight. This ensures that the antenna may be aimed at desired satellite(s) without obstruction between the satellite(s) and any portion of the reflector. When using the satellite(s) aiming coordinates for a particular site, be sure that there are no trees, buildings, power lines, etc., between the dish location and the satellite. It is important that this clearance includes the total dish surface area and that nothing is blocking any portion of the dish surface. VERIFYING ABSENCE OF SIGNAL INTERFERENCE For optimal signal reception, it is important that the antenna site selected be free of strong microwave or other signal interface. Microwave systems in the vicinity of a selected 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 site survey performed to determine if the site selected is suitable. Two of the companies which perform these services are: Comsearch, Inc. Spectrum Planning, Inc Sunrise Valley Drive P.O. Box Reston, VA Richardson, TX (703) (214) VERIFYING AVAILABILITY OF POWER REQUIREMENTS The power requirements will vary depending on the options purchased with the 6M antenna. Table 2-2 provides a list of the power requirements for each option. Table 2-3 provides a list of the circuit breaker requirements for each option. Verify that adequate power is available prior to finalizing the selection of the site. Table 2-2. Power Requirements Antenna Motorization - Domestic (60 Hz) Azimuth Axis 208V ac, 3-phase, 1.9 amp max (single speed -120 ) 208V ac, 3-phase, 3.6 amp max (single speed -180 ) 208V ac, 3-phase, 14.8 amp max (variable speed -180 ) Elevation Axis 208V ac, 3-phase, 1.9 amp max (single speed -120 ) 208V ac, 3-phase, 3.2 amp max (single speed -180 ) 208V ac, 3-phase, 14.8 amp max (variable speed -180 ) Polarization Axis 208V ac, 3-phase, 0.24 amp 42S042D SERIES METER EARTH STATION ANTENNA 2-13

21 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Table 2-2. Power Requirements - Continued Antenna Motorization - International (50 Hz) Azimuth Axis 380V ac, 3-phase, 0.9 amp max (single speed -120 ) 380V ac, 3-phase, 2.0 amp max (single speed -180 ) 380V ac, 3-phase, 7.8 amp max (variable speed -180 ) Elevation Axis 380V ac, 3-phase, 0.9 amp max (single speed -120 ) 380V ac, 3-phase, 1.5 amp max (single speed -180 ) 380V ac, 3-phase, 7.8 amp max (variable speed -180 ) Polarization Axis 380V ac, 3-phase, 0.15 amp Antenna Motorization - International (50 Hz) Azimuth Axis 415V ac, 3-phase, 0.9 amp max (single speed -120 ) 415V ac, 3-phase, 2.0 amp max (single speed -180 ) 415V ac, 3-phase, 7.8 amp max (variable speed -180 ) Elevation Axis 415V ac, 3-phase, 0.9 amp max (single speed -120 ) 415V ac, 3-phase, 1.5 amp max (single speed -180 ) 415V ac, 3-phase, 7.8 amp max (variable speed -180 ) Polarization Axis 415V ac, 3-phase, 0.15 amp De-Ice System Full Reflector Power Half Reflector Power 208V ac, 3-phase, 15.8 kva 208V ac, 3-phase, 7.9 kva Feed and Subreflector 208V ac, 3-phase, 1.0 kva Table 2-3. Circuit Breaker Requirements Antenna Motorization Total De-Ice System Total 20 amp, 3-phase 100 amp, 3-phase 42S042D SERIES METER EARTH STATION ANTENNA 2-14

22 ANTENNA SITE SELECTION (120 AND 180 ANTENNA) Conduit Placement Prior to installing the foundation (the next section), determination must be made as to how power and control cables will be run to the antenna. If the cables are to be run underground, conduit must be placed in the foundation prior to pouring the cement. Refer to Figure 3-3 in the next section for the recommended location of conduit with the foundation for the 120 antenna. Refer to Figure 4-2 in Section 4 for the recommended location of conduit within the foundation for the 180 antenna. 42S042D SERIES METER EARTH STATION ANTENNA 2-15

23 SECTION 3 FOUNDATION INSTALLATION (120 MOUNT) 3-1 General 3-1 Antenna Considerations 3-1 Foundation Design Considerations 3-5 Foundation Construction 42S042F SERIES METER EARTH STATION ANTENNA

24 SECTION 3 FOUNDATION INSTALLATION (120 MOUNT) GENERAL The pointing accuracy of the installed antenna is determined by the stiffness of the mount, the reflector, and the foundation. Therefore, antenna foundation preparation is an essential part of antenna installation. ANTENNA CONSIDERATIONS The foundation heading is critical to the performance of the motorized antenna, but not to the performance of the non-motorized antenna. The foundation heading establishes the center of azimuth travel. For a non-motorized antenna to be later upgraded to motorization, the foundation heading must be installed initially as though for a motorized antenna. 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. Provisions must be made to provide suitable support for power, RF, and control cables either by buried conduit or overhead raceway. If conduit is supplied, it shall be at least 3 inches (7.6 cm) in diameter. Lightning arrestors must be provided across all cables leaving the antenna per applicable local codes and N.F.P.A. codes. (Refer to Section 2 for information on required operational clearances.) FOUNDATION DESIGN CONSIDERATIONS The antenna is designed to withstand an effective velocity pressure of 31 pounds per square (151.4 kg/m2) foot in any orientation, or 40 pounds per square foot (195.3 kg/m2) if stowed. These pressures represent 110 and 125 mile per hour (176 and 200 km/h) winds respectively at standard air at ground level. The foundation should be designed to maintain the antenna integrity under these same loads, with a safety factor of at least 1.5, and also to not allow the mounting plane of the three antenna feet to tilt more than The loading for the above conditions is presented in Tables 3-1 and 3-2. Figure 3-1 depicts the sign conventions for the tables. The loads for each mounting foot are listed in Table 3-1 and the resultant foundation loads are listed in Table 3-2. If loads are required for wind pressures other than those listed, they may be calculated from the information in the tables using the following procedure: 1. Subtract the corresponding Weight Only load components from the load components for the orientation of interest. 42S042G SERIES METER EARTH STATION ANTENNA 3-1

25 FOUNDATION INSTALLATION (120 MOUNT) 2. Divide the desired wind pressure by the wind pressure for the orientation of interest. 3. Multiply each of the load components by the factor obtained in step Add back the Weight Only components which were subtracted in step 1. The following information presents a typical pad foundation design. If a special foundation design or load frame is required, a qualified structural engineer who is familiar with local structural codes should be employed. The foundation loading information below should be used in implementing the design. +Y FOOT 1 FOOT 2 0 AZ REF +X AZ ANGLE +Z (OUT OF PAPER) WIND ANGLE WIND DIRECTION FOOT 3 Figure 3-1. Sign Conventions For Foundation Loading, NOTE The following tables list forces which are the loads applied to the foundation by the antenna. Forces are in pounds; moments are in pound-feet. 3-2 SERIES METER EARTH STATION ANTENNA 42S042G

26 FOUNDATION INSTALLATION (120 MOUNT) Table 3-1. Loads at Individual Antenna Feet, AZ LOAD WIND EL FOOT FOOT FOOT ANGL CASE DIR ANGL F x F y F z F x F y F z F x F y F z 0 Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt S042G SERIES METER EARTH STATION ANTENNA 3-3

27 FOUNDATION INSTALLATION (120 MOUNT) Table 3-2. Total Loads on Foundation, AZ LOAD WIND EL FOUNDATION FORCE AND MOMENT SUMMATION ANGL CASE DIR ANGL F x F y F z M x M y M z 0 Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt Weight Only Weight Only Weight Only PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt PSF & Wt NOTE ViaSat, Inc. does not represent or warrant that any particular design or size of foundation is appropriate for any particular locality or installation. 3-4 SERIES METER EARTH STATION ANTENNA 42S042G

28 FOUNDATION INSTALLATION (120 MOUNT) FOUNDATION CONSTRUCTION Refer to Table 3-3 for the recommended foundation size. Figure 3-2 and the following information provide the installation information. These recommendations are based on the soil conditions listed and do not consider any special clearance requirements. 1. The minimum safe soil-bearing capacity is 2000 PSF (96 kn/m 2 ). 2. Reinforcing bars shall conform to ASTM A615, grade Do not weld anchor bolts to reinforcing bars. This will remove the temper and reduce the strength of the anchor bolts. 4. All concrete shall be building code standard weight 3000 psi (20,700 kn/m 2 ) compressive strength at 28 days. 5. Areas (6 X 12 inch or 15.2 cm X 30.4 cm) for mounting feet should be flat within 1/16 inch and level with respect to one another within 1/4 inch (6 mm). 6. Anchor bolts are 1 inch diameter and must conform to ASTM A193 grade B7 or ASTM A Do not use nuts under the foot, The foot must rest flush on the concrete pad. Use one washer, 85844, and one flourocarboncoated nut, , per anchor bolt to secure foot to pad. After the concrete is fully cured, torque the nuts to foot-pounds ( Nm). Refer to Figure 3-3 for 6-meter 120 conduit placement. 42S042G SERIES METER EARTH STATION ANTENNA 3-5

29 FOUNDATION INSTALLATION (120 MOUNT) Figure 3-2. Antenna Foundation Installation (Sheet 1 of 4), F 3-6 SERIES METER EARTH STATION ANTENNA 42S042G

30 FOUNDATION INSTALLATION (120 MOUNT) Table 3-3. Foundation Sizing Based on Soil Strength Item Case 1 Case 2 Soil Modulus of Elasticity E soil 1000 KSF E soil 200 KSF Examples of Type Hard Clay Medium Clay of Soil Dense Sand Loose Sand Sand and Gravel Loose Glacial Till Shale Dense Glacial Till Dimension A 156 Inches 270 Inches Dimension B 78 Inches 135 Inches NOTE Case 2 footings may be used for soft clay and silty sand only if E soil is verified to be greater than or equal to 200 Kips per square foot (KSF). Figure 3-2. Antenna Foundation Installation (Sheet 2 or 4), F 42S042G SERIES METER EARTH STATION ANTENNA 3-7

31 FOUNDATION INSTALLATION (120 MOUNT) GENERAL NOTES: 1. THE FOUNDATIION HEADING IS CRITICAL TO THE PERFORMANCE OF THE MOTORIZED ANTENNA, BUT NOT TO THE PERFORMANCE OF THE NON-MOTORIZED ANTENNA. THE FOUNDATION HEADING ESTABLISHES THE CENTER OF AZIMUTH TRAVEL. FOR A NONMOTORIZED ANTENNA TO BE LATER UPGRADED TO MOTORIZATION, THE FOUNDATION HEADING MUST BE INSTALLED INITIALLY AS THOUGH FOR A MOTORIZED ANTENNA. 2. 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. 3. PROVISIONS MUST BE MADE TO PROVIDE SUITABLE SUPPORT FOR POWER, RF AND CONTROL CABLES EITHER BY BURIED CONDUIT OR OVERHEAD RACEWAY. IF CONDUIT IS SUPPLIED, IT SHALL BE AT LEAST 3 INCHES DIAMETER. 4. LIGHTNING ARRESTORS MUST BE PROVIDED ACROSS ALL CABLES LEAVING THE ANTENNA PER APPLICABLE LOCAL CODES AND N.F.P.A. CODES. 5. REFER TO DRAWING FOR INFORMATION ON OUTLINE AND CLEARANCE DIMENSIONS. 6. USE NO NUTS UNDER THE FOOT, THE FOOT MUST REST FLUSH ON THE CONCRETE PAD. USE ONE WASHER AND ONE FLOUROCARBONCOATED NUT, , PER ANCHOR BOLT TO SECURE FOOT TO PAD. AFTER THE CONCRETE IS FULLY CURED, TORQUE THE NUTS TO FOOT-POUNDS. FOUNDATION CONSTRUCTION NOTES: 1. THE MINIMUM SAFE SOIL-BEARING CAPACITY IS 2000 PSF. 2. REINFORCING BARS SHALL CONFORM TO ASTM A615, GRADE DO NOT WELD ANCHOR BOLTS TO REINFORCING BARS. THIS WILL REMOVE THE TEMPER AND REDUCE THE STRENGTH OF THE-ANCHOR BOLTS. 4. ALL CONCRETE SHALL BE BUILDING CODE STANDARD WEIGHT 3000 P.S.I. COMPRESSIVE STRENGTH AT 28 DAYS. 5. AREAS (6 X 12 INCH) FOR MOUNTING FEET SHOULD BE FLAT WITHIN 1/16 INCH AND LEVEL WITH RESPECT TO ONE ANOTHER WITHIN 1/4 INCH. 6. ANCHOR BOLTS ARE 1 INCH DIAMETER AND MUST CONFORM TO ASTM A193 GRADE 87 OR ASTM A325. Figure 3-2. Antenna Foundation Installation (Sheet 3 of 4), F 3-8 SERIES METER EARTH STATION ANTENNA 42S042G

32 FOUNDATION INSTALLATION (120 MOUNT) Figure 3-2. Antenna Foundation Installation (Sheet 4 of 4), F 42S042G SERIES METER EARTH STATION ANTENNA 3-9

33 FOUNDATION INSTALLATION (120 MOUNT) NOTE The AC disconnect box is not supplied by ViaSat. Figure 3-3. Recommended Conduit Placement Locations for 120 Antenna, F 3-10 SERIES METER EARTH STATION ANTENNA 42S042G

34 SECTION 4 FOUNDATION INSTALLATION (180 MOUNT) 4-1 General 4-1 Antenna Considerations 4-1 Foundation Design Considerations 4-19 Foundation Construction 42S042F SERIES METER EARTH STATION ANTENNA

35 SECTION 4 FOUNDATION INSTALLATION (180 MOUNT) GENERAL ANTENNA CONSIDERATIONS The pointing accuracy of the installed antenna is determined by the stiffness of the mount, the reflector, and the foundation. Therefore, antenna foundation preparation is an essential part of antenna installation. The foundation heading is critical to the performance of the motorized antenna, but not to the performance of the nonmotorized antenna. The foundation heading establishes the center of azimuth travel. 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. Provisions must be made to provide suitable support for power, RF, and control cables either by buried conduit or overhead raceway. If conduit is supplied, it shall be at least 3 inches in diameter. Lightning arrestors must be provided across all cables leaving the antenna per applicable local codes and N.F.P.A. codes. (Refer to Section 2 for information on required operational clearances.) FOUNDATION DESIGN CONSIDERATIONS The antenna is designed to withstand an effective velocity pressure of 31 pounds per square foot (151.4 kg/m 2 ) in any orientation, or 40 pounds per square foot (195.3 kg/m 2 ) if stowed. These pressures represent 110 and 125 mile per hour (176 and 200 km/h)winds respectively at standard air at ground level. The foundation should be designed to maintain the antenna integrity under these same loads, with a safety factor of at least 1.5, and also to not allow the mounting plane of the three antenna feet to tilt more than The loading for the above conditions is presented in Tables 4-1 and 4-2. Figure 4-1 depicts the sign conventions for the tables. The loads for each mounting foot are listed in Table 4-1 and the resultant foundation loads are listed in Table 4-2. If loads are required for wind pressures other than those listed, they may be calculated from the information in the tables using the following procedure: 42S042G SERIES METER EARTH STATION ANTENNA 4-1

36 FOUNDATION INSTALLATION (180 MOUNT) 1. Subtract the corresponding Weight Only load components from the load components for the orientation of interest. 2. Divide the desired wind pressure by the wind pressure for the orientation of interest. 3. Multiply each of the load components by the factor obtained in step Add back the Weight Only components which were subtracted in step 1. The following information presents a typical pad foundation design. If a special foundation design or load frame is required, a qualified structural engineer who is familiar with local structural codes should be employed. The foundation loading information below should be used in implementing the design. NOTE The following tables list forces which are the loads applied to the foundation by the antenna. Forces are in pounds; moments are in pound-feet. 4-2 SERIES METER EARTH STATION ANTENNA 42S042G

37 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-1. Sign Conventions for Foundation Loading (Sheet 1 of 2), S042G SERIES METER EARTH STATION ANTENNA 4-3

38 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-1. Sign Conventions for Foundation Loading (Sheet 2 of 2), SERIES METER EARTH STATION ANTENNA 42S042G

39 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, S042G SERIES METER EARTH STATION ANTENNA 4-5

40 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-6 SERIES METER EARTH STATION ANTENNA 42S042G

41 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-7

42 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-8 SERIES METER EARTH STATION ANTENNA 42S042G

43 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-9

44 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-10 SERIES METER EARTH STATION ANTENNA 42S042G

45 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-11

46 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-12 SERIES METER EARTH STATION ANTENNA 42S042G

47 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-13

48 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-14 SERIES METER EARTH STATION ANTENNA 42S042G

49 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-15

50 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-16 SERIES METER EARTH STATION ANTENNA 42S042G

51 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 42S042G SERIES METER EARTH STATION ANTENNA 4-17

52 FOUNDATION INSTALLATION (180 MOUNT) Table 4-1. Loads at Individual Antenna Feet, (continued) 4-18 SERIES METER EARTH STATION ANTENNA 42S042G

53 FOUNDATION INSTALLATION (180 MOUNT) NOTE ViaSat, Inc. does not represent or warrant that any particular design or size of foundation is appropriate for any particular locality or installation. FOUNDATION CONSTRUCTION Refer to Figure 4-2 for the recommended foundation size and conduit placement. Refer to Figure 4-3 for 6-meter 180 foundation template. 42S042G SERIES METER EARTH STATION ANTENNA 4-19

54 FOUNDATION INSTALLATION (180 MOUNT) IMPORTANT NOTICE ViaSat does not represent or warrant that any particular design or size of foundation is appropriate for any particular locality or installation. VIASAT, INC. Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 1 of 8), B 4-20 SERIES METER EARTH STATION ANTENNA 42S042G

55 FOUNDATION INSTALLATION (180 MOUNT) NOTES: 1. FOOTINGS DESIGNED FOR 201 KM/H [125 MPH] WINDS. 2. REINFORCING BARS SHALL CONFORM WITH ASTM A , GRADE CONCRETE SHALL BE 20.7 MPa [3000 PSI] COMPRESSIVE STRENGTH AT 28 DAYS. 4. SOIL BEARING CAPACITY TO BE A MINIMUM OF 95.8 Kpa [2000 PSF]. 5. ANCHOR BOLTS ARE 1 INCH DIAMETER AND SHALL CONFORM TO ASTM A197-B7 OR ASTM A325. DO NOT WELD ANCHOR BOLTS. 6. FROST LINE TO BE A MAXIMUM OF 61 CM [24 INCHES] BELOW GRADE. 7. USE FOUNDATION TEMPLATE TO INSURE PROPER ANCHOR BOLT LOCATION. 8. PROPER ELETRICAL GROUNDING SHALL BE PROVIDED BY THE INSTALLING CONTRACTOR TO MEET LOCAL APPLICABLE CODES. THIS MAY TAKE THE FORM OF A BURIED GRID OR A SUITABLE COPPER STAKE, DEPENDING ON LOCAL SOIL CONDITIONS. THE MOUNT SHALL BE ELECTRICALLY CONNECTED TO THE GROUND. 9. PROVISIONS MUST BE MADE TO PROVIDE SUITABLE SUPPORT FOR POWER, RF AND CONTROL CABLES EITHER BY BURIED CONDUIT OR OVERHEAD RACEWAY. IF PVC CONDUIT IS SUPPLIED IT SHALL BE AT LEAST 7.6 CM [3 INCHES] IN DIAMETER 10. NO BUILDINGS, WALLS, FENCES OR OTHER PERMANENT FIXTURES SHOULD BE PLANNED FOR INSTALLATION ANY CLOSER THAN 2 METERS OF THE ANTNNA AND FOUNDATION ENVELOPE WITHOUT CONSULTATION WITH THE FACTORY. 11. PAD REQUIRED FOR OPTIONAL 8862 CONTROLLER INSTALLATION. Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 2 of 8), B 42S042G SERIES METER EARTH STATION ANTENNA 4-21

56 FOUNDATION INSTALLATION (180 MOUNT) 12. PROVISIONS MUST BE MADE TO PROVIDE SUITABLE SUPPORT FOR IFL WAVEGUIDE EITHER BY BURIED CONDUIT OR OVERHEAD RACEWAY. IF PVC CONDUIT IS SUPPLIED IT SHALL BE AT LEAST 15.2 CM [6 INCH] DIAMETER WITH A MINIMUM BEND RADIUS OF 91.5 CM P36 INCHES]. 13. AC POWER CONDUIT FOR ANTENNA MOTORS AND DEICING TO BE SIZED BY ELECTRICAL CONTRACTOR TO MEET LOCAL, STATE, AND NATIONAL ELECTRICAL CODES. 14. EXTERNAL AC POWER DISCONNECT BOX NOT SUPPLIED BY VIASAT. SOME LOCAL CODES MAY REQUIRE EXTERNAL UNIT. THE 8861/8862 CONTROLLER HAS AN INTERNAL MAIN BREAKER/DISCONNECT. 15. GROUND CABLE PIGTAILS SHALL BE IN PVC CONDUIT AND NOT TIED TO FOUNDATION REBAR. 16. DO NOT RUN CONDUIT UNDER ANY ANTENNA OR ACTUATOR SUPPORT AREA CM [3 INCH] DIAMTER CONDUIT WITH A MINIMUM BEND RADIUS OF 91.5 CM [36 INCHES] FOR AZIMUTH ACTUATOR MOTOR POWER. Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 3 of 8), B 4-22 SERIES METER EARTH STATION ANTENNA 42S042G

57 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 4 of 8), B 42S042G SERIES METER EARTH STATION ANTENNA 4-23

58 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 5 of 8), B 4-24 SERIES METER EARTH STATION ANTENNA 42S042G

59 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 6 of 8), B 42S042G SERIES METER EARTH STATION ANTENNA 4-25

60 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 7 of 8), B 4-26 SERIES METER EARTH STATION ANTENNA 42S042G

61 FOUNDATION INSTALLATION (180 MOUNT) Figure 4-2. Foundation Plan and Conduit Placement, 6M-180 (Sheet 8 of 8), B 42S042G SERIES METER EARTH STATION ANTENNA 4-27

62 FOUNDATION INSTALLATION (180 MOUNT) PARTS LIST ITEM NO QTY PART NO. DESCRIPTION TEMPLATE BASE TEMPLATE, LH TEMPLATE, RH ANGLE, TEMPLATE TEMPLATE, BASE SCREW, HEX HD, 1/4-20 X 3/ NUT, HEX, 1/4-20 Figure Meter Foundation Template (Sheet 1 of 2), SERIES METER EARTH STATION ANTENNA 42S042G

63 FOUNDATION INSTALLATION (180 MOUNT) Figure Meter Foundation Template (Sheet 2 of 2), S042G SERIES METER EARTH STATION ANTENNA 4-29