7.6m Earth Station Antenna Assembly, Installation, Operations, & Maintenance Manual Document# OM76 – Revision J ASC Signal Corporation CANADA: 606 Beech Street Whitby, Ontario, Canada L1N 7T8 OM76_Rev J USA: 1120 Jupiter Rd. Ste.
© 2010-11 ASC Signal Corporation All Rights Reserved. No part of this document may be photocopied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means whether electronic, mechanical, or otherwise without the prior written permission of ASC Signal Corporation. ASC Signal Corporation reserves the right to change details in this publication without notice.
Table of Contents INTRODUCTION: How to Use This Manual 4 I.I I.II I.III I.IV I.V I.VI I.VII I.VIII 4 4 5 5 5 6 7 7 Purpose & Overview Description Miscellaneous Notices Warning Symbols Safety Terms Summary Summary of Safety Precautions Things to Never Do Parts Verification 1.0 Recommended Tools & Foundation Preparation 1.1 1.2 1.3 1.4 8 Recommended Tools A-325 Tensioning Procedure Foundation Preparation 7.6m Assembly & Installation Reference Drawings 8 9 10 10 2.
Figure 4-1: High-Speed Antenna Lubrication Points Figure 4-2: Medium-Speed Antenna Lubrication Points 22 23 Figure 5-1: Jac/Jack Anti-Backlash Procedure 27 List of Tables Table 1.1: Recommended Tools Table 1.2: 7.6m Assembly & Installation Drawings 8 10 Table 4.1: Lubrication Chart 21 Table 5.1: Cure Times Table 5.
INTRODUCTION: How to Use This Manual I.I Purpose & Overview PURPOSE The scope of this manual is intended to provide station personnel with the base installation, operation, and maintenance requirements necessary for a 7.6-Meter C-, X- or Ku-Band Earth Station Antenna. This manual provides a convenient reference for authorized operator/service personnel requiring technical information on general system or specific subsystem equipment. Top Level Assembly Numbers are as follows: 7.6m ESA C-Band: ES76C-1 7.
I.III Miscellaneous Notices Proprietary Information The technical data contained herein is proprietary to ASC Signal Corporation. It is intended for use in the installation, operation, and maintenance of ASC Signal equipment. This data shall not be disclosed or duplicated, in whole or in part, without the expressed written consent of ASC Signal Corporation.
The following safety symbols and terms may be used in this manual: Les symbols et les termes suivants de sûreté peuvant être employés en ce manuel: WARNING!/CAUTION! Statements identify conditions & practices that could result in injury or loss of life. AVERTISSEMENT! Les rapports d’avertissement identifient les conditions ou les pratiques qui pourraient avoir comme conséquence les dommages ou la perte de la vie. RISK OF ELECTRIC SHOCK! RISQUE DE DÉCHARGE ÉLECTRIQUE! I.
I.VII Things to Never Do NEVER touch circuits or reach into an enclosure until the disconnection of power and absence of charge has been confirmed NEVER service or adjust equipment alone. Electric shock can lead to cardiac arrest. Presence of immediate aid gives you a 90% chance of survival, but this drops by 10% with every passing minute. After 5 minutes resuscitation without permanent heart and/or brain damage is nearly impossible.
1.0 Recommended Tools & Foundation Preparation The following sections will offer you with information related to preparing to assemble and install the 7.6m ESA, such as recommended tools (Section 1.1) and foundation preparation (Section 1.3). The details of the A-325 tensioning procedure required for the tightening of all A-325 hardware will also be explained (Section 1.2). 1.1 Recommended Tools ASC Signal supplies all appropriate hardware/parts required for installation of the 7.6M ESA.
1.2 A-325 Tensioning Procedure Throughout the installation instructions set forth in this manual, there will be references to the A-325 hardware tensioning procedure. A-325 hardware must be properly tensioned to avoid slippage between bolted surfaces under high loads. Slippage can cause the corresponding assembly to move or slip, resulting in antenna misalignment. Use of A-325 hardware eliminates slippage between mating surfaces under high loading conditions as well as the need for future retightening.
1.3 Foundation Preparation Before beginning the installation process on the ground mount assembly, ensure that the foundation has been prepared. Foundation specifications are provided by ASC Signal and may be used as a reference by civil engineering personnel when preparing the foundation for local soil conditions. These specifications are available before the shipment arrives by contacting the Customer Service Center or your Account Manager.
2.0 Mount & Antenna Assembly Procedures These sections provide the basic sequence and tips for the assembly of various elements of the 7.6m ESA. Appropriate drawings and schematics references for assembly of the antenna are also provided, when applicable. Refer to the drawings, instructions, and schematics for the specific system being installed, per the information provided in Table 1.2. 2.
2.2 General Subreflector Alignment Guidelines The primary goal of Subreflector alignment is for the Subreflector to be properly centered and for the height to be adjusted to the correct focal length for the antenna.
3.0 Operation After completing the assembly of the antenna, the 7.6m ESA is ready to become operational. To operate the 7.6m ESA, it is necessary to direct it to the desired satellite and adjust both Elevation and Azimuth angles appropriately. These procedures provide details on how to correctly position the antenna on a desired satellite.
Step 2 of 9: With the antenna positioned in Azimuth, with the transponder signal maximized, follow the same procedure as in Step 1, only this time using the Elevation direction (scanning up-and-down). Once again, do this until the transponder signal has been maximized. Step 3 of 9: Repeat this procedure, alternating between the Azimuth and Elevation excursions of the antenna, until you have peaked the antenna transponder amplitude.
Figure 3-4: Polarization at 45 Degrees from Optimum Setting Step 9 of 9: With all 24 transponder signals of approximately equal amplitude appearing on the Spectrum Analyzer screen, determine the specific antenna system and satellite parameters. Rotate the feed assembly as required until the appropriate (odd or even) transponder signals have been maximized.
3.2 Subreflector Adjustment After the satellite has been acquired and testing has taken place with the Spectrum Analyzer, the subreflector may need to be adjusted to maximize optimum performance of your antenna. The following procedures should be followed if a subreflector adjustment is required to maximize optimum performance. NOTE: All INTELSAT Type Approved antennas do not require subreflector adjustment.
4.0 Preventive Maintenance These sections contain periodic preventative maintenance instructions for the 7.6m Earth Station Antenna. Included are instructions for performing inspections, preventative maintenance procedures, and cleaning. NOTE: Refer to applicable vendor manuals for any repair procedures that are not included in this manual. These sections describe cleaning, inspections, and preventative maintenance procedures.
CAUTION: Allowing the antenna to continue to operate after damage or discrepancies have been noted during inspection may result in property damage (especially to your earth station antenna), as well as increase the risk of creating dangerous situations for personnel, causing personal injury and/or loss of life. 4.2.
Visually inspect all mechanical parts for freedom of operation with no misalignment, binding, or interference. Check all cabling for sufficient slack in order to prevent cable strain while still providing enough restraint to adequately prevent abrasions and/or chaffing during antenna and feed movement Check antenna mounting and interconnecting assembly hardware for security.
4.3.3 Lubrication For long life and trouble-free operation be certain not to extend the lubrication schedule beyond the frequency recommended in the Lubrication Chart. The frequency should be shortened if the antenna is subjected to an adverse environment (e.g., high temperature, extended periods of rainfall, high humidity, dust storms, etc).
Table 4.1: Lubrication Chart Lube Pt.
Figure 4-1: High-Speed Antenna Lubrication Points OM76_Rev J Page 22 of 28
Figure 4-2: Medium-Speed Antenna Lubrication Points OM76_Rev J Page 23 of 28
4.4 Site Acceptance Test Procedure Once the installation procedure has been completed, and prior to turning over the system to the station facility, some form of Site Acceptance Test procedure will need to be performed, checked off, and signed by the responsible personnel and/or representative. 5.
For antenna surfaces, such as the front or back of the main reflector or subreflector, high-reflectivity white paint should be used. This type of paint disperses light rays. The paint may be applied to the prepared area using a brush, roller, or sprayer. If a sprayer is used, be sure to first thin the paint to a proper consistency with paint thinner (10-15% thinner). Thoroughly cover all previously primed areas with paint and blend the paint with any preexisting painted surfaces. 5.2.
7. While holding the Adjusting Cap (item a) stationary, tighten the Locknut (item b). 8. Operate the Jack through the entire stroke, checking for tight spots. NOTE: If Jac/Jack has been used over only a portion of its stroke, the backlash should be adjusted in the least worn portion of the screw. CAUTION: Take special care not to over-tighten the anti-backlash system. Doing so may result in binding and/or lockup between the drive nut and the lifting screw.
APPENDIX: Equipment Issues & Technical Support REPORTING EQUIPMENT LOSS OR DAMAGE If you find equipment was damaged during the shipping process, file a claim with the carrier. Follow the “Reporting Visible Loss or Damage” or “Reporting Concealed Damage” procedures to file a claim with a carrier. REPORTING VISIBLE LOSS OR DAMAGE Make a note of any loss or evidence of external damage on the freight bill or receipt, and have it signed by the carrier’s agent.
