1. Manuals
  2. Brands
  3. ViaSat Manuals
  4. Antenna
  5. Series 8345
  6. Installation manual

ViaSat Series 8345 Installation Manual

Viasat 4.5-meter prime focus motorized antenna
Hide thumbs
Table of Contents

Advertisement

Quick Links

Series 8345
4.5-Meter Prime Focus Motorized Antenna
Installation Manual
Manual 42S199F
March 2003

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Series 8345 and is the answer not in the manual?

Questions and answers

Related Manuals for ViaSat Series 8345

Summary of Contents for ViaSat Series 8345

  • Page 1 Series 8345 4.5-Meter Prime Focus Motorized Antenna Installation Manual Manual 42S199F March 2003...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents Table of Contents ....................iii List of Figures ......................v List of Tables ......................vi Safety Summary ....................vii General Information ................... 1-1 Introduction ......................1-1 Description .......................1-1 Stability During High Winds.................1-2 General........................2-1 What to do About Visible Loss or Damage ............2-1 What to do About Concealed Damage ..............2-1 How to Inventory Equipment Received ..............2-2 How To Return Equipment ...................2-2...
  • Page 3 Table of Contents 2.12.1 Installation of Feed....................2-32 2.12.2 Installation of C-Band Feed .................2-32 2.12.3 Installation of Ku-Band Feed................2-38 2.13 Technical Drawings ....................2-43 Operation......................3-1 General........................3-1 Satellite Pointing Procedure ..................3-1 Focal Length Inspection And Adjustment............3-1 3.3.1 Adjustment Procedure ...................3-2 Equipment Required For Transmit Patterns ............3-3 Maintenance......................

  • Page 4: List Of Figures

    Table of Contents LIST OF FIGURES Figure 2-1. Installation of Leg Assemblies..................2-9 Figure 2-2. Installation of Leg Support Bracket ................2-11 Figure 2-3. Installation of Support Arms ..................2-12 Figure 2-4. Installation of Azimuth Ring ..................2-13 Figure 2-5. Tightening Sequence for Pedestal..................2-14 Figure 2-6.

  • Page 5: List Of Tables

    Table of Contents LIST OF TABLES Table 2-1. Tools and Equipment Required For Installation .............2-5 Table 2-2. Torque Values For Antenna Fasteners (High Strength Grade 5 Zinc or Galvanized Steel)..............................2-6 Table 2-3. Torque Values For Antenna Fasteners (Stainless Steel) ..........2-7 42S199F...

  • Page 6: Safety Summary

    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.
  • Page 7 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.
  • Page 8 Blank Page...

  • Page 9: General Information

    Failure to do so may result in personal injury or equipment damage. 1.2 Description The Series 8345 4.5M Prime Focus Motorized Antenna is designed for quick and easy installation and provides cost effective, high performance for a wide range of applications combining the following features: •...

  • Page 10: Stability During High Winds

    An optional hoisting device may also be used during installation. Each of the optional feeds offered with the Series 8345 4.5M Prime Focus Motorized Antenna provides consistent high quality and unusual economy in a mid-sized antenna system.

  • Page 11: General

    ViaSat thoroughly inspects and carefully packs all equipment before shipment. At the time of shipment, the carrier assumes responsibility for its safe delivery; therefore, do not return damaged units to ViaSat. Instead, file a claim with the carrier as noted in the paragraphs following the initial unpacking procedure given below: 1.

  • Page 12: How To Inventory Equipment Received

    This procedure will apply whenever equipment is returned for warranty or other services. a) Notify ViaSat of the problem and request a Return Material Authorization (RMA) number and shipping instructions. For a current list of telephone and email contact information please refer to the Contact Information section of the ViaSat internet site (http://www.viasat.com).

  • Page 13: General Mechanical Safety Summary

    Chapter 2 - Installation General Mechanical Safety Summary These are general mechanical safety precautions that are not related to any specific procedure. They are recommended precautions that personnel must understand and apply. WARNING Installation or maintenance of antennas may require persons to work at elevated work stations.

  • Page 14: General Electrical Safety Summary

    Chapter 2 - Installation General Electrical Safety Summary These are general electrical safety precautions that are not related to any specific procedure. These are recommended precautions that personnel must understand and apply. WARNING Avoid shorting circuits when using metal tools. Some circuits have high current capability which, when shorted, will flash and may cause burns and/or eye injury.

  • Page 15: Recommended Tools And Equipment

    Chapter 2 - Installation Recommended Tools And Equipment Table 2-1 lists the tools and equipment required for efficient and convenient installation. Table 2-1. Tools and Equipment Required For Installation Quantity Description 1 Set Combination wrenches 1/4-inch to 1 1/2-inch size including 15/16-inch 2 Each Alignment pins 1/8-inch and 1/2-inch taper 1 Each...

  • Page 16: Recommended Installation Sequence

    Chapter 2 - Installation Recommended Installation Sequence In order to ensure proper and trouble-free installation, the following installation sequence is recommended: 1. Assembly of Mount 2. Assembly of Reflector 3. Installation of Feed 2.10 Recommended Torque Values The following list contains the recommended torque values for all 4.5M antenna fasteners.
  • Page 17 Chapter 2 - Installation Table 2-3. Torque Values For Antenna Fasteners (Stainless Steel) Fastener Size Torque (ft-lb) tolerance ±10% 1/4-20 6 (8 Nm) 5/16-18 12 (16 Nm) 3/8-16 20 (26 Nm) 1/2-13 45 (60 Nm) 3/4-10 130 (except as noted) (173 Nm) NOTE The required torque value for the foundation anchor bolts is 100 lb-ft (136 Nm).

  • Page 18: Assembly Of Mount

    Chapter 2 - Installation 2.11 Assembly of Mount The following procedure provides instructions for assembling the Series 8345 elevation-over-azimuth mount. Three foundation feet are supplied with each foundation kit. (See foundation instructions for installation of feet.) NOTE Before proceeding, be sure that the ground cable has been attached to a foot of the foundation according to local grounding codes.

  • Page 19: Figure 2-1. Installation Of Leg Assemblies

    Chapter 2 - Installation Figure 2-1. Installation of Leg Assemblies 2. Attach two leg assemblies to each foundation foot and bolt the two leg ends to the foundation foot using 3/4-10 x 4 1/2-inch bolt, washer, and nut in six places. At one foundation foot, install a ground attachment lug to the leg ends before bolting the leg ends to the foundation foot.
  • Page 20 Chapter 2 - Installation 6. Bolt the three support arms together at the center using 3/4-10 x 2 1/4-inch bolt, washer, and nut in three places. 7. Position the azimuth ring on top of the leg support bracket and bolt in place at the outboard holes using 3/4-10 x 2-inch bolt and washer in six places.

  • Page 21: Figure 2-2. Installation Of Leg Support Bracket

    Chapter 2 - Installation Figure 2-2. Installation of Leg Support Bracket 2-11 42S199F...

  • Page 22: Figure 2-3. Installation Of Support Arms

    Chapter 2 - Installation Figure 2-3. Installation of Support Arms 2-12 42S199F...

  • Page 23: Figure 2-4. Installation Of Azimuth Ring

    Chapter 2 - Installation Chapter 2 - Installation Figure 2-4. Installation of Azimuth Ring 2-13 2-13 42S199F 42S199F...

  • Page 24: Figure 2-5. Tightening Sequence For Pedestal

    Chapter 2 - Installation Chapter 2 - Installation Figure 2-5. Tightening Sequence for Pedestal 2-14 2-14 42S199F 42S199F...
  • Page 25 Chapter 2 - Installation NOTE To continue assembly of the mount will require the use of scaffolds in four feet sections. Three people should be available to handle the parts. The load frame weighs 250 lbs (113 kg). Three people should lift it to the four foot high level, followed by a further lift to its final position.

  • Page 26: Figure 2-6. Az/El Assembly, 4.5 Meter Motorized (Sheet 1 Of 5), 482045B

    Chapter 2 - Installation 19. Align load frame, center pivot bearing, and pivot arm as shown in Figure 2-6. 20. Bolt pivot arm to load frame using 3/4-10 x 2 1/2-inch bolt, washer, and nut in four places. 21. Install eccentric cam followers, 1-3/8 washers, 1-14 nuts, and grease fittings in the four bottom holes of load frame.
  • Page 27 Chapter 2 - Installation Figure 2-6. AZ/EL Assembly, 4.5 Meter Motorized (Sheet 2 of 5), 482045B 2-17 42S199F...
  • Page 28 Chapter 2 - Installation Figure 2-6. AZ/EL Assembly, 4.5 Meter Motorized (Sheet 3 of 5), 482045B 2-18 42S199F...
  • Page 29 Chapter 2 - Installation Figure 2-6. AZ/EL Assembly, 4.5 Meter Motorized (Sheet 4 of 5), 482045B 2-19 42S199F...
  • Page 30 Chapter 2 - Installation Figure 2-6. AZ/EL Assembly, 4.5 Meter Motorized (Sheet 5 of 5), 482045B 2-20 42S199F...

  • Page 31: Adjustment Of Eccentric Cam Followers

    Chapter 2 - Installation 2.11.1 Adjustment of Eccentric Cam Followers The eccentric cam followers were installed during the assembly procedure to give maximum clearance between the rollers and the surface of the azimuth ring. It is now necessary to adjust the eccentric cam followers such that the clearances between them and the azimuth ring are kept to a minimum.

  • Page 32: Installation Of Azimuth Stabilizer Assembly

    Chapter 2 - Installation 7. Once the clevis plates are properly set and all 5/8-inch hardware is torqued, drill 1/4-inch diameter through pilot holes in top clevis plate, torque arm, and bottom clevis plate. 8. Install 1/4-inch diameter x 1.50-inch long steel spring pin in two places. 2.11.3 Installation of Azimuth Stabilizer Assembly 1.

  • Page 33: Installation Of Hub Support Brackets

    Any modification or substitution to the specified shear pin without written approval by ViaSat Antenna Engineering will void all warranties and shall nullify ViaSat of all liability of property or personal injury. Refer to Figure 2-6 and perform the following to install the elevation actuator:...
  • Page 34 Chapter 2 - Installation NOTE Bolts must be oriented with nuts on top side because of clearance considerations. 2. Attach three hub stabilizer braces to hub with 3/8-16 x 1 1/2-inch bolts, washers, and nuts. 3. Attach right hand and left hand elevation pivot brackets to hub with 1/2-13 x 2 1/2-inch bolts, washers, and nuts.

  • Page 35: Assembly Of Reflector

    Chapter 2 - Installation 2.12 ASSEMBLY OF REFLECTOR CAUTION If it is necessary to walk inside the reflector during assembly, be sure to walk on the portion of the reflector closest to the Hub and directly over the Ribs. Any weight placed on unsupported parts of the reflector Panels can deform the Panel curvature, which will severely degrade Antenna performance.

  • Page 36: Figure 2-7. Assembly And Adjustment Of Rib And Panel Brace

    Chapter 2 - Installation 3. Attach a Rib to the underside of the upper Hub flange and onto the spring pin. Fasten with a 3/8-16 x 1-1/4 bolt and nut. This is connection "B". Make sure that the Rib is supported by hand until STEP 4 is completed. Refer to Figure 2-7. Figure 2-7.

  • Page 37: Figure 2-8. Template Installation

    Chapter 2 - Installation b. If the holes are not aligned laterally, the bolt at connection "B" must be loosened just enough to move the Rib and align the holes. After moving the Rib, retighten the bolt. PINS ALIGN RIB HOLE TEMPLATE SCREW "B"...

  • Page 38: Figure 2-9. Tapered Pins

    Chapter 2 - Installation Figure 2-9. Tapered Pins d. Retighten the bolt at connection "B" to 31 ft-lbs, and tighten the bolt at connection "A" to 76 ft-lbs, ensuring that the Rib does not become misaligned during the tightening. Perform the inspection and adjustment procedure of STEP 5 on each of the Ribs.
  • Page 39 Chapter 2 - Installation NOTE Every third Panel joint will require a 1/4-20 x 1-inch socket head screw in the hole near the outside diameter of the reflector to accommodate the spar support bracket during FEED INSTALLATION described later. The spar brackets should be positioned so that in the completed reflector the spars will appear to be at 45 degrees to the ground.

  • Page 40: Figure 2-10. Placing The Template Onto The Panel

    Chapter 2 - Installation Figure 2-10. Placing the Template onto the Panel 9. A "stringing" procedure will help to further ensure that the reflector will have the best surface accuracy, and thus achieve the best performance possible for Ku or transmit operation. Refer to Figures 2-11A and 2-11B. Proceed as follows: a.
  • Page 41 Chapter 2 - Installation b. Similarly stretch two more lengths of line between the other chosen points to form an equilateral triangle on the reflector. Tighten the fasteners at connection "C" for the three ribs located at the apexes of the triangle. Stretch another line from one triangle apex (in the left corner of the notch) to one of the three opposite notches included within the triangle.

  • Page 42: Installation Of Feed

    2.12.1 Installation of Feed Each procedure below describes the installation of the manually polarized feed onto the Series 8345 Earth Station Antenna. Installation drawings for the motorized feeds are appended at the back of this manual. Procedures for both the C-band and the Ku-band feed are included; therefore, use appropriate procedure.

  • Page 43: Figure 2-12. Feed And Feed Housing Assembly (C-Band)

    Chapter 2 - Installation Figure 2-12. Feed and Feed Housing Assembly (C-Band) Figure 2-13. Attachment of Spars to Support Brackets 2-33 42S199F...

  • Page 44: Figure 2-14. Installation Of Feed Housing And Orthomode Transducer

    Chapter 2 - Installation Figure 2-14. Installation of Feed Housing and Orthomode Transducer 2-34 42S199F...
  • Page 45 Chapter 2 - Installation 6. Position orthomode transducer (OMT) against feed housing assembly, aligning holes in orthomode transducer with holes in feed horn. Be sure to orient the OMT to the feed as shown. Attach a friction device at top and bottom of orthomode transducer by aligning hole in each friction device with hole in orthomode transducer and feed horn.

  • Page 46: Figure 2-15. Installation Of Lnas/Lnbs

    Chapter 2 - Installation Figure 2-15. Installation of LNAs/LNBs 2-36 42S199F...

  • Page 47: Figure 2-16. Installation Of Lna/Lnb Cover

    Chapter 2 - Installation Figure 2-16. Installation of LNA/LNB Cover 2-37 42S199F...

  • Page 48: Installation Of Ku-Band Feed

    Chapter 2 - Installation 2.12.3 Installation of Ku-Band Feed Install a typical Ku-band feed using the following procedures. NOTE If the C-band feed is used, do not use this procedure. Instead, use the procedure specifically for the C-band feed. This procedure is only applicable to installation of the Ku-band feed.

  • Page 49: Figure 2-17. Feed Window Installation

    Chapter 2 - Installation Figure 2-17. Feed Window Installation 3. Apply a thin coat of grease to the ridge surface and the groove surface of each half of the feed housing. 4. Slip clamp ring into place on feed horn and align holes in clamp ring with three outside holes of feed horn.

  • Page 50: Figure 2-18. Feed And Feed Housing Assembly (Ku-Band)

    Chapter 2 - Installation Chapter 2 - Installation Figure 2-18. Feed and Feed Housing Assembly (Ku-Band) Figure 2-18. Feed and Feed Housing Assembly (Ku-Band) 10. Bolt each of four spar support brackets to the outside edge of reflector using 1/4- 10.

  • Page 51: Figure 2-20. Installation Of Feed Housing, Omt And Lnas/Lnbs

    Chapter 2 - Installation 12. Attach assembled feed housing to support spars and loosely bolt in place using 1/4-20 x 1 1/4-inch bolt, washer, and nut, in eight places. See Figure 2-20. Make sure that the feed rotates freely. Tighten all fasteners to finger tight. Then tighten the nut on the screw an additional 2/3 turn, but no more than 1 additional turn.

  • Page 52: Figure 2-21. Installation Of Lna/Lnb Cover

    Chapter 2 - Installation 17. Insert end of braided shield into slot in terminal lug already installed on ground attachment lug which is attached to support arm. Secure braided shield to terminal lug using 1/4-20 x 1/2-inch screw. NOTE Be sure to allow enough slack in the coaxial cables between the LNAs/LNBs and the support spar so that the feed can be rotated.

  • Page 53: Technical Drawings

    Chapter 2 - Installation 2.13 Technical Drawings The following list contains technical drawings required for installation of the 4.5M antenna. The list is given in the order the drawings appear on the following pages. Part No. Rev. Title 367733 Motorized 4.5-Meter Ku-Band Feed Installation 367730 Motorized 4.5-Meter Ku-Band Feed Assembly 2-43...

  • Page 54: Figure 2-22. Motorized 4.5-Meter Ku-Band Feed Installation (Sheet 1 Of 3), 367733

    Chapter 2 - Installation 71505 Nut, Hex 10 – 24 SST 174557 Washer, Lock No. 10 SST 73275 Washer, Flat No. 10 SST 72460 Screw, Pan No. 10 – 24 x ¾ SST 176575 Clamp 1 ¼ in 84737 Clamp ½...
  • Page 55 Chapter 2 - Installation Figure 2-22. Motorized 4.5-Meter Ku-Band Feed Installation (Sheet 2 of 3), 367733 2-45 42S199F...
  • Page 56 Chapter 2 - Installation Figure 2-22. Motorized 4.5-Meter Ku-Band Feed Installation (Sheet 3 of 3), 367733 2-46 42S199F...

  • Page 57: Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 1 Of 10), 367730

    Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 1 of 10), 367730 2-47 42S199F...
  • Page 58 Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 2 of 10), 367730 2-48 42S199F...
  • Page 59 Chapter 2 - Installation Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 3 of 10), 367730 2-49 2-49 42S199F 42S199F...
  • Page 60 Chapter 2 - Installation Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 4 of 10), 367730 2-50 2-50 42S199F 42S199F...
  • Page 61 Chapter 2 - Installation Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 5 of 10), 367730 2-51 2-51 42S199F 42S199F...
  • Page 62 Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 6 of 10), 367730 2-52 42S199F...
  • Page 63 Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 7 of 10), 367730 2-53 42S199F...
  • Page 64 Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 8 of 10), 367730 2-54 42S199F...
  • Page 65 Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 9 of 10), 367730 2-55 42S199F...
  • Page 66 Chapter 2 - Installation Chapter 2 - Installation Figure 2-23. Motorized 4.5-Meter Ku-Band Feed Assembly (Sheet 10 of 10), 367730 2-56 2-56 42S199F 42S199F...

  • Page 67: Operation

    Chapter 3 - Operation Chapter 3 Operation 3.1 General This chapter contains procedures for satellite pointing, focal length inspection and adjustment, and equipment required for transmit patterns. 3.2 Satellite Pointing Procedure With the feed installed and the electronics operational, use the following procedure for pointing at the desired satellite and peaking on the signal.

  • Page 68: Adjustment Procedure

    Chapter 3 - Operation 3.3.1 Adjustment Procedure The following is the focal length adjustment procedure. 1. Subtract the feed measurement M from 62.12, giving difference D. D=62.12 - M 2. Attach the feed spars to the dish with the slotted brackets. Use only one screw, in the hole near the end of the spar.

  • Page 69: Equipment Required For Transmit Patterns

    Chapter 3 - Operation 3.4 Equipment Required For Transmit Patterns The following represents a list of equipment required to run transmit patterns. This assumes that the system under test has transmit capability. • 70 MHz IF Source (stable) • C-Band/Ku-Band upconverter (whichever is applicable) (stable) •...
  • Page 70 Chapter 3 - Operation Blank 42S199F...

  • Page 71: Maintenance

    Chapter 4 - Maintenance Chapter 4 Maintenance 4.1 General The Series 8345 4.5-Meter Prime Focus Motorized Antenna is designed for use in many different environmental conditions with minimum maintenance requirements. Several areas on the antenna require service at various intervals to ensure the proper use and operation.

  • Page 72: Monthly Maintenance

    Chapter 4 - Maintenance 4.2.2 Monthly Maintenance NOTE If it has been some time since electrical power was applied to the actuator motors, go to the antenna and remove all electrical power, manually release the motor brake and rotate motor shaft. Once it is determined that the brake will release and the shaft will turn freely, then apply electrical power to the motors.
  • Page 73 Chapter 4 - Maintenance 5. Check the oil level in both the azimuth and elevation actuator gear boxes and add Mobil SHC 634 oil, as required, to maintain a level of approximately half full. 6. Inspect azimuth machine screw. If the screws are coated with grease and the grease is in good condition, no further action is required.

  • Page 74: Yearly Maintenance

    Chapter 4 - Maintenance 4.2.4 Yearly Maintenance Perform the following procedures at least once every year. 1. Inspect the foundation pad for structural cracks and repair as required. 2. Check torque values on all fasteners as follows: Torque Values For Antenna Fasteners (High Strength Grade 5 Zinc or Galvanized Steel) Fastener SizeTorque (ft-lb) tolerance ±10%...

  • Page 75: Corrosion Protection

    Chapter 4 - Maintenance 4.3 Corrosion Protection Perform the following procedures after completing the installation and every 12 months thereafter. NOTE Pressurization transmit waveguide runs feed components should be maintained to prevent moisture from entering the system. Receive only pressurization is optional. 1.
  • Page 76 Chapter 4 - Maintenance Blank 42S199F...

Table of Contents