Technical data | Andrew 3.7-Meter Earth Station Antenna Stereo System User Manual

Installation, Operation and Maintenance
Bulletin OM37
Revision C
Type ES37( )
3.7-Meter ESA
3.7-Meter Earth Station Antenna
Andrew Corporation
10500 West 153rd Street
Orland Park, IL U.S.A. 60462
Telephone: 708-349-3300
FAX (U.S.A.): 1-800-349-5444
Internet: http://www.andrew.com
Customer Service, 24 hours: U.S.A. • Canada • Mexico: 1-800-255-1479
U.K.: 0800 250055 • Republic of Ireland: 1 800 535358
Printed in U.S.A. 9/00
Other Europe: +44 1592 782612
Copyright © 2000 by Andrew Corporation
Table of Contents
Introduction
How to Use This Manual
Getting Started
Installation
Procedures
Operation
Preventive
Maintenance
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Proprietary Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Information and Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Parts Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reporting Equipment Loss or Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reporting Visible Loss or Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reporting Concealed Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Inventory Equipment Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Returning Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation Sequence Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Site Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ground Mount Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
For MPK Types Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
For MPJK Types Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Main Reflector Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Enclosure Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Reflector-To-Mount Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Subreflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Feed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Foundation Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
A-325 Tensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Assembly (Using a Crane) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Assembly (Without a Crane) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Motorizable Pedestal Ground Mount Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Manual Pedestal Ground Mount Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Manual Actuator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Manual Actuator Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Motorizable Pedestal Ground Mount Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Embedded Pipe Ground Mount Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Elevation/Azimuth Strut Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Reflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Alignment Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Enclosure (Pedestal Mount Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Reflector-to-Mount Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Using a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Without a Crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Reflector-to-Mount Assembly, Embedded Pipe Ground Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Subreflector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Subreflector Struts, Embedded Pipe Ground Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Subreflector Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Feed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Acquiring A Satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Manual Actuator Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Embedded Pipe Ground Mount Elevation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Azimuth Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Subreflector Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
General Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Electrical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Mechanical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Local Control/Motor Drive Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Drive System Voltage and Current Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Pedestal Mount Bearing Pad Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Preservation of Component Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Aluminum Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Galvanized Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Jackscrews/Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Gear Motor/Housing Fill Drain Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
2
Table of Contents
3.7-Meter Earth Station Antenna
Introduction
Like all Andrew earth station antennas, the 3.7-Meter Earth Station Antenna provides
high gain and exceptional pattern characteristics. The electrical performance and exceptional versatility provides the ability to configure the antenna with your choice of linearlypolarized 2-port or 4-port combining network. That versatility is provided at the time of
initial purchase, as well as in the future, as your satellite communication requirements
evolve.
The aluminum reflector is precision formed for accuracy and strength requiring minimal
assembly. The versatile pedestal mount can be purchased with either manual or motorizable capabilities. The pedestal mount features 180 degree azimuth coverage in three
continuous 120 degree overlapping ranges and executes 90 degree continuous elevation adjustment. This large adjustment range provides non-critical foundation orientation
and the ability to view geostationary satellites from horizon-to-horizon, from any location
worldwide.
The motorizable pedestal mount features self-aligning bearings for the elevation pivots,
resulting in "zero" backlash. This mount can be operated manually, but has the ability to
be upgraded for motorized operation, including steptracking/Smartrack™ applications.
The motorizable mount type is indicated by the ES37MPK or ES37MPJK letters within
the antenna type number. The addition of the letter "J" within the antenna type number
indicates that the mount includes azimuth/elevation machine jackscrews, instead of corresponding azimuth/elevation strut assemblies. The azimuth/elevation jackscrews are
equipped for integration with the optional motor drive systems.
A manual pedestal mount is also available. It provides the same strong and versatile
combination of mechanical features as the motorizable version; except that the elevation
and azimuth axes are locking types, instead of bearing mounted types. This mount type
is always equipped with manual struts and a fixed mount for the separately-ordered
combining network. This mount has been designed for manual applications only and
cannot be upgraded to a motorizable mount.
The aluminum enclosure and hot-dipped galvanized steel mount maintain pointing accuracy and ensures durability and reliability. The antenna and standard manual mount with
enclosure will survive 125 mph (200 km/h) wind, in any position of operation, without
damage or permanent deformation in moderate coastal/industrial areas. Severe conditions require additional protection.
Andrew provides a complete line of available options, including field-installed electrical
anti-icing heaters, motor drive systems (with power interfaces addressing domestic and
international standards), remote microprocessor antenna control for motor drive systems, pressurization equipment, and interconnecting HELIAX® cables and waveguide.
3
Introduction
Proprietary Data
The technical data contained herein is proprietary to Andrew Corporation. It is intended
for use in operation and maintenance of Andrew supplied equipment. This data shall not
be disclosed or duplicated in whole or in part without express written consent of Andrew
Corporation.
Information and
Assistance
Andrew Corporation provides a world-wide technical support network. Refer to the technical assistance portion of this this manual for the contact numbers appropriate to your
location.
Notice
The installation, maintenance, or removal of antenna systems requires qualified, experienced personnel. Andrew installation instructions have been written for such personnel.
Antenna systems should be inspected by qualified personnel to verify proper installation,
maintenance and condition of equipment.
Andrew Corporation disclaims any liability or responsibility for the results of improper or
unsafe installation and maintenance practices.
All designs, specifications, and availabilities of products and services presented in this
manual are subject to change without notice.
Copyright © 1999, Andrew Corporation
Technical
Assistance
24-hour Technical Assistance
For technical assistance, call the following numbers at anytime.
Call From
Call To
Telephone
Fax
North America (toll free)
U. S. A.
1-(800)-255-1479
(800)-349-5444
Any Location
(International)
U. S. A.
(708)-349-3300
(708)-349-5410
Customer Service Center
The Andrew Customer Service Center gives you direct access to the information and
personnel service you need, such as the following:
• Place or change orders
• Check price and delivery information
• Request technical literature
You can call from any of the following:
Call From
Telephone
Fax
North America
1-800-255-1479 (toll free)
1-(800)-349-5444 (toll free)
United Kingdom
00-800-0-255-1479 (toll free)
00-800-0-349-5444 (toll free)
Australia
0011-800-0-255-1479 (toll free) 0011-800-0-349-5444 (toll free)
China
00-800-0-255-1479 (toll free)
00-800-0-349-5444 (toll free)
New Zealand
00-800-0-255-1479 (toll free)
00-800-0-349-5444 (toll free)
Hong Kong
001-800-0-255-1479 (toll free)
001-800-0-349-5444 (toll free)
4
Introduction
How to Use This Manual
Overview
The scope of this manual is intended to provide station personnel with the base installation, operation, and maintenance requirements necessary for a 3.7-Meter C- 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.
The tables and figures presented in this manual are used as communication aids for the
installation, operation, and maintenance of the 3.7-Meter Earth Station Antenna. These
tables and figures instantly convey messages, as well as make the procedures easier to
understand. This manual uses tables and figures for the following references:
• Tables
The tables allow you to locate information quickly and easily.
• Drawings
The drawings supplement the installation instructions by using a combination of graphics and verbage to assist you in simplifying complex procedures and clarifying components.
• Photographs The photographs compliment the installation instructions by providing
actual examples of the steps being performed, which allow you to view
the installation in concrete form.
Content
The manual is divided into five distinct sections, each dealing with a specific technical
topic relating to either system or component subsystem information. The sections contained in this manual are described and listed under the following technical headings:
• How to Use
Describes the manual's purpose, content, and communication aids.
This Manual Additionally, this section lists the related documentation for the 3.7Meter Earth Station Antenna.
• Getting
Started
• Installation
Procedures
• Operation
Provides the preliminary information needed to perform a successful
installation. This section should be reviewed prior to the installation. The
warnings, recommended tools, parts verification, instructions on reporting lost or damaged equipment, and installation checklist are located in
this section.
Provides the procedures for the different phases of a 3.7-Meter Earth
Station Antenna base installation. This section will help you easily find
requirements for an individual task, as well as displays the sequence for
each task execution.
Describes the controls, functions, and general operating procedures
required for proper operation of the 3.7-Meter Andrew Earth Station
Antenna.
• Preventive
Describes preventive maintenance procedures that are required to
Maintenance maintain proper functional operation of your new Andrew Earth Station
Antenna.
5
How to Use This Manual
Getting Started
Overview
The installation, operation, and maintenance of the 3.7-Meter Earth Station Antenna
requires qualified and experienced personnel. Andrew installation, operation, and maintenance instructions are illustrated for such personnel. Additionally, the antenna should
be inspected by qualified personnel to verify proper installation, maintenance, and condition of equipment as described in Preventive Maintenance. The basic equipment and
accessories are either manufactured or design controlled by Andrew Corporation.
The prerequisite information necessary for the 3.7-Meter Earth Station Antenna can be
found in this section. Furthermore, this section should be reviewed BEFORE performing
the installation, operation, or maintenance. Warnings, recommended tools, and the
antenna parts can be verified and/or determined with such a review.
Warnings
When installing the 3.7-Meter Earth Station Antenna, be conscious of the warnings presented below. For further information or clarification of this information, contact the
Customer Service Center. The warnings are as follows:
1. Electrical shock from voltages used in this antenna system may cause personal injury
or death. Prior to making any electrical connections or performing maintenance or
repair, ensure that the power is removed. Electrical connections should be made only by
qualified personnel in accordance with local regulations.
2. Installation of antennas may require persons to work at elevated work stations.
Whenever persons are working at eight or more feet above the ground and not on a
guarded platform, they should wear safety belts with at least one (preferably two) lanyards.
3. Never stand underneath any object while it is being lifted.
4. Always wear a hard hat, especially if someone is above you.
5. Make sure no person is in or under the reflector while it is being lifted or positioned;
personal injury can result if the reflector assembly falls.
6. Personnel should never be hoisted in or out of the reflector by the crane; personal
injury may result.
7. Andrew earth station antennas supplied to standard product specifications will survive
125 mph winds in any operational position in moderate coastal/industrial areas. Severe
conditions require additional protection. Should it be expected that winds will exceed
125 mph, it is recommended that Andrew antennas be steered to specific azimuth and
elevation orientations to minimize wind forces upon the structure and thereby increase
the probability of survival.
8. It is recommended that all cross-axis waveguide and coaxial cables are secure such
that high winds will not cause excessive flexing. Position the antenna to an elevation of
90 degrees. The azimuth jackscrew should be placed in the center of its travel.
9. When the antenna is transmitting, severe eye injury or injury to other parts of the
body can result from exposure to radio frequency (RF) energy. The antenna must be
turned off before entering the area in front of the reflector and near the feed.
6
Getting Started
NOTE: Failure to follow an installation procedure could result in damage to equipment
or personal injury.
Additional warnings will be displayed throughout this manual for your awareness. These
warnings can be identified in warning boxes as shown in the following sample.
Andrew disclaims any liability or responsibility for the results of improper or unsafe
installation, operation, or maintenance practices.
Recommended
Tools
Andrew supplies all appropriate hardware/parts required for the installation of your 3.7Meter Earth Station Antenna. All tools necessary for the installation process should be
provided by the installation crew. Andrew recommends the following tools to be used for
a proper installation of the 3.7-Meter Earth Station Antenna.
Tool
Size
Open End or Combination Wrenches
Quantity
5/16 Inch
7/16 Inch
9/16 Inch
7/8 Inch
3/4 Inch
1/2 Inch
1-1/4 Inch
Crane
1 Ton Minimum Capacity, extended end
Nylon Web Slings (2000 pound breaking strength) 3 Inch by 14 Foot
Rope or Cord (2000 pound breaking strength)
50 Foot
Shackles
5/8 Inch
Ladder
10 Foot Extension
Drive Sockets
1/16 Inch
9/16 Inch
7/8 Inch
3/4 Inch
1-1/4 Inch
Breaker Bar
1/2 Inch
Spud Wrenches
1-1/16 Inch
1-1/4 Inch
Screw Driver
Standard
Phillips
Allen Wrench
7/64 Inch
3/16 Inch
1/4 Inch
Tape Measure (or other measuring device)
Standard
Felt-tip Marker (or other marking device)
Standard
Hammer
Standard
Rubber Mallet
Standard
Pry Bar
Standard
Tin Snips
Standard
Safety Gloves (each installer)
Standard
2
2
2
2
2
2
1
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Table 2-1. Recommended Tools
7
Getting Started
Parts Verification
Upon receipt of your order, the shipment should be verified to ensure that all parts have
reached your site. This process should occur before the installation process begins.
Andrew Corporation thoroughly inspects and carefully packs all equipment before shipment. If you find that there are missing components, please refer to page 9 for step-bystep instructions on how to properly report the equipment loss.
When you have received your order, verify that all parts contained in the shipment correspond to the parts listed on your packing list.
Reporting
Equipment Loss or
Damage
Reporting Visible
Loss or Damage
If you find that there was damage caused to the equipment during the shipping process,
a claim should be filed with the carrier. Follow the "Reporting Visible Loss or Damage"
or "Reporting Concealed Damage" procedures when filing a claim with the carrier.
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. Failure to adequately describe such external
evidence of loss or damage may result in the carrier refusing to honor a damage claim.
The form required to file such a claim will be supplied by the carrier.
Reporting
Concealed
Damage
Concealed damage means damage which does not become apparent until the unit has
been unpacked. The contents may be damaged in transit due to rough handling, even
though the carton may not show external damage. If you discover damage after unpacking the unit, make a written request for an inspection by the carrier's agent, then file a
claim with the carrier since such damage is most likely the carrier's responsibility.
Inventory
Equipment
Received
After opening your shipment, an inventory of the parts should occur immediately. Check
each item received in your shipment against the packing slip included with the shipment.
If any items are missing, please notify Andrew Corporation immediately by contacting
the Customer Service Center.
8
Getting Started
Returning
Equipment
Andrew Corporation tries to ensure that all items arrive safe and in working order.
Occasionally, despite these efforts, equipment is received which is not in working condition. When this occurs, and it is necessary to return the equipment to Andrew
Corporation for either repair or replacement, return can be expedited by following the
procedure listed below:
Step 1
Call the Andrew Customer Service Center and request a Return Material Authorization
(RM) number, as well as an address to forward the material to.
Step 2
Tag or identify the defective equipment, noting the defect or circumstances. Also, be
sure to write the RM number on the tag. It would be helpful to reference the sales order
and purchase order, as well as the date the equipment was received.
Step 3
Pack the equipment in its original container with protective packing material. If the original container and packing material are no longer available; pack the equipment in a
sturdy corrugated box, and cushion it with appropriate packing material.
Step 4
Be sure to include the following information when returning the equipment:
• Your Company Name
• Your Company Address
• City, State, and Zip Code
• Telephone Number
• RM Number
• Problem Description
• Contact Name
NOTE: Absence of the RM number will cause a delay in processing your equipment for
repair. Be sure to include the RM number on all correspondence.
Step 5
Ship the equipment to Andrew Corporation using UPS, U.S. Postal Service, or other
appropriate carrier; freight prepaid and insured. The material should be forwarded to the
address given by the Andrew contact in Step 1.
9
Getting Started
Installation
Sequence
Checklist
The 3.7-Meter Earth Station Antenna requires the installation team to perform the
assembly in the sequence presented below. Moreover, this sequence should be
reviewed to ensure a smooth installation. Use the following checklist to verify and/or
determine the installation sequence.
Site Preparation
Refer to Foundation Section for guidance in preparing location and installation of the
3.7-Meter Earth Station Antenna foundation.
Ground Mount
Assembly
‰ Unpack ground mount assembly
‰ Attach ground mount assembly to foundation
‰ Organize ground mount hardware
‰ Wax galvanized hardware in hardware kit
‰ Tighten ground mount hardware to foundation
‰ Attach azimuth strut weldment to ground mount assembly
For MPK Types
Only
‰ Assemble azimuth strut
‰ Mount azimuth strut to ground mount assembly
‰ Bolt elevation strut brackets to elevation strut
‰ Mount elevation strut to ground mount assembly
‰ Assemble manual actuator
‰ Remove manual actuator (after elevation/azimuth adjustment)
10
Getting Started
For MPJK Types
Only
‰ Mount azimuth pivot assembly to ground mount assembly
‰ Bolt one jack to azimuth pivot assembly
‰ Unscrew jack
‰ Tighten galvanized hardware using A-325 tensioning procedure
‰ Lubricate jackscrews
‰ Pull protective boot over jackscrew
‰ Bolt elevation pivot assembly brackets to ground mount assembly
‰ Bolt second jack to elevation pivot assembly
‰ Unscrew jack
‰ Tighten galvanized hardware using A-325 tensioning procedure
‰ Lubricate jackscrews
‰ Pull boot over jackscrew
Main Reflector
Assembly
‰ Remove protective covering from crate
‰ Pry top crate panel off
‰ Pry sides off crate
‰ Pry front off crate
‰ Unbolt reflector halves from bottom of crate
‰ Prepare assembly area with blocks of wood to assemble reflector
‰ Lay reflector halves on prepared assembly area
‰ Align reflector halves
‰ Insert all hardware as outlined in Installation Procedures
11
Getting Started
‰ Add reflector-mounting ring
‰ Mount front and back hub-mounting rings
‰ Apply sealant to outside of reflector-mounting ring
‰ Perform recommended string test
Enclosure
Assembly
‰ Remove rear and side covers from enclosure assembly
‰ Attach enclosure to mounting ring
‰ Apply sealant backing rod around enclosure/mounting ring mating surfaces
‰ Apply RTV sealant
Reflector-ToMount Assembly
‰ Route sling through upper holes of torsion box assembly
‰ Route two rope tag lines through torsion box assembly to be used as guides
‰ Place foam blocks on ground to avoid scraping reflector when lifted
‰ Raise reflector
‰ Bolt left bolt of enclosure bracket
‰ Rotate reflector to align right bolt
‰ Extend elevation strut or jackscrew, and attach to top of enclosure assembly
‰ Tighten hardware using A-325 tensioning procedure
‰ Carefully raise reflector to zenith position
‰ Remove hoisting apparatus
12
Getting Started
Subreflector
‰ Preassemble subreflector weldment
‰ Attach subreflector-mounting ring to strut assembly
‰ Attach angle clips
‰ Attach subreflector to reflector
‰ Adjust subreflector
‰ Tighten adjustment hardware
Feed System
‰ Refer to installation instructions packaged with the individual feed systems
13
Getting Started
Installation Procedures
Overview
This section provides installation procedures for the 3.7-Meter Andrew Earth Station
Antenna. The installation procedures include instructions on the following antenna components:
• Mount
• Reflector
• Enclosure
• Reflector-to-Mount Assembly
• Subreflector
• Feed System (Refer to installation instructions packaged with the individual feed systems)
Foundation
Preparation
Before beginning the installation process on the ground mount assembly, ensure that
the foundation has been prepared. Foundation specifications are provided by Andrew
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.
Sweep foundation clean of any dirt or debris.
To ensure level, smooth surface for mount, remove excess concrete from shear caps
and anchor bolts as shown in Figure 3-1.
Figure 3-1
14
Installation Procedures
A-325 Tensioning
During the installation process, there are several references to the A-325 hardware tensioning procedure. The A-325 hardware must be properly tensioned to avoid slippage
between bolted surfaces under high loads. Slippage can cause the corresponding
assembly to move, causing antenna misalignment. When designated, the A-325 hardware should be tightened according to the following tensioning procedure.
NOTE: Tensioned bolts are for final connections only and should not be loosened for
reuse.
Step 1
Lubricate the bolt threads with the provided stick wax to reduce friction.
Step 2
Insert the bolt, and add a flat washer—if required. Do not allow wax under the flat
washer.
Step 3
Add the nut, and finger tighten.
Step 4
After the connections are complete, tighten the bolts until the surfaces are joined and
the nuts are snug (for example, full effort of a person using an ordinary spud wrench).
Do not proceed with Steps 5 and 6, unless the connection is final and is not intended to
be loosened again.
Note: If the bolts are loosened after Steps 5 and 6, discard and replace with new hardware.
Step 5
Using a felt-tip marker, mark the nuts and the ends of the bolts with a straight line as
shown in Figure 3-1a and Figure 3-1b.
Step 6
Tighten the nuts further with an extra long wrench until the nuts are moved 1/3 turn (120
degrees) as shown in Figure 3-1a for bolt lengths less than four diameters and 1/2
turn (180 degrees) as shown in Figure 3-1b for bolt lengths over four diameters.
Use Felt Marker
Before
Tensioning
After
Tensioning
Figure 3-1a: A-325 Tensioning Procedure
For bolts less than 4 diameters
15
Use Felt Marker
Before
Tensioning
After
Tensioning
Figure 3-1b: A-325 Tensioning
For bolts over four diameters
Installation Procedures
Mount
The elevation/azimuth mount design simplifies installation, minimizes foundation requirements, and enables horizon-to-horizon coverage from any worldwide location. The
ground mount assembly enables 180 degree positioning for selected azimuth viewing.
Azimuth range coverage is plus or minus 90 degrees, divided into three 120 degree
continuous ranges with a 30 degree overlap. Elevation adjustment is continuous from 0
degrees to 90 degrees.
After ensuring that the foundation has been properly prepared, the ground mount
assembly process may begin.
Unpacking
The pedestal ground mount assembly arrives in a packaged wooden crate as shown in
Figure 3-2 below. The mount can be positioned manually or by using a crane; however,
Andrew recommends that this procedure be performed using a crane to ensure speed
and ease of installation.
Figure 3-2: Crate Unpacking
Assembly
(Using a Crane)
As stated previously, the pedestal ground mount installation process can be conducted
manually or by using a crane. The following steps provide the necessary procedures for
installing the ground mount assembly using a crane.
16
Installation Procedures
Step 1
Carefully remove the ground mount assembly (P/N 208800 - motorizable or P/N
202680-2 manual) from the packing crate. Leave the steel strapping intact to avoid disengagement of the panning frame from the square-tube weldment during the ground
mount installation.
Step 2
Securely attach the crane to the ground mount assembly using a sling, and carefully
raise the entire ground mount as shown in Figure 3-3.
Figure 3-3: Raising Ground Mount Assembly
Step 3
Align the ground mount assembly directly over the anchor bolts (P/N 203314 - manual
or P/N 203666 - motorizable), which should have been previously mounted in the foundation pad.
NOTE: Ground mount positioning on the foundation is dependent upon predetermined
azimuth viewing requirements. The ground mount assembly arm should be positioned
opposite the satellite requirement. If your site is in the Northern hemisphere, your satellite will be located in the South. If your site is in the Southern hemisphere, your satellite
will be located in the North.
Step 4
Lower the ground mount assembly onto the anchor bolts with the corresponding hole
pattern.
17
Installation Procedures
Step 5
Attach the ground mount assembly to the eight corresponding anchor bolts using a 3/4
inch flat washer and 2-3/4 inch hex nuts as shown in Figure 3-4a. One 3/4 inch hex nut
is supplied with the anchor bolt kit and the second 3/4 inch hex nut is supplied with the
antenna.
Figure 3-4a: Ground Mount Assembly Base Hardware
Step 6
Remove the steel strapping from the ground mount assembly.
Step 7
Tighten the foundation hardware using the A-325 tensioning procedure.
Figure 3-4b shows the ground mount assembly attached to the foundation.
Figure 3-4b: Ground Mount Assembly Base Hardware
18
Installation Procedures
Assembly
(Without a Crane)
As stated earlier, Andrew recommends the use of a crane during this installation
process; however, we recognize that a crane may not always be available. If a crane is
not available, the following steps provide the procedure for installing the ground mount
assembly without a crane.
Step 1
Carefully remove the ground mount assembly (P/N 208800-motorizable or P/N 2026802- manual) from the packing crate. Leave the steel strapping intact to avoid disengagement of the panning frame from the square-tube weldment during the ground mount
installation.
Step 2
Lay the ground mount assembly on its side, in line with the anchor bolts (P/N 203314manual or P/N 203666-motorizable) as shown in Figure 3-5.
NOTE: Ground mount positioning on the foundation is dependent upon predetermined
azimuth viewing requirements. The ground mount assembly panning-frame arm should
be opposite of the satellite requirement. If your site is in the Northern hemisphere, your
satellite will be located in the South. If your site is in the Southern hemisphere, your
satellite will be located in the North.
Figure 3-5: Ground Mount Assembly Alignment with Anchor Bolts
19
Installation Procedures
Step 3
Lift the ground mount assembly into an upright position. In the absence of a crane, it is
recommended that a minimum of two people assist in the lifting of the mount assembly
as shown in Figure 3-6a and Figure 3-6b.
Figure 3-6a: Manual Lift
Figure 3-6b: Manual Lift
20
Installation Procedures
Figure 3-7: Mount Alignment/Adjustment
NOTE: You may need to adjust the mount when lifting it to ensure that the anchor bolts
are aligned directly underneath the base of the ground mount assembly as shown in
Figure 3-7.
Step 4
Attach the ground mount assembly to the eight corresponding anchor bolts using a 3/4
inch flat washer and 2-3/4 inch hex nuts as shown in Figure 3-3a.
NOTE: Ground mount positioning on the foundation is dependent upon predetermined
azimuth viewing requirements. The ground mount assembly arm should be opposite the
satellite requirement. If your site is in the Northern hemisphere, your satellite will be
located in the South. If your site is in the Southern hemisphere, your satellite will be
located in the North.
Step 5
Remove the steel strapping from the ground mount assembly.
Step 6
Tighten the foundation hardware using the A-325 tensioning procedure.
Figure 3-8a illustrates the ground mount assembly attached to the foundation.
Figure 3-8a: Ground Mount Assembly Base Hardware
21
Installation Procedures
Motorizable
Pedestal Ground
Mount Assembly
The ground mount assembly enables 180° positioning for selected azimuth viewing.
Azimuth range coverage is ±90° divided into three 120° continuous ranges with 30°
overlap. Elevation adjustment is continuous from 0 to 90°.
Step 1
Position and mount 204737 azimuth tiller arm weldment to ground mount assembly as
shown using 0.75 x 1.75 in. A-325 bolts and nuts. Tighten hardware per A-325 tensioning procedure. NOTE: Mounting position of azimuth tiller arm weldment is dependent
upon predetermined azimuth range requirements as shown.
Step 2
Apply supplied stick lubricant to set screw threads. Loosely install 0.50 x 1.0 in. set
screws in azimuth and 0.50 x 1.50 in. set screws in elevation strut supports.
Step 3
Position and mount 204754 elevation support angle assembly to ground mount as
shown using 0.50 x 1.75 in. A-325 bolts, flat washers and nuts. Tighten hardware per A325 tensioning procedure.
Step 4
Loosely install supplied 0.75 x 2.00 in. A-325 bolts, flat washers and nuts in elevation
support angle assembly. This hardware along with the upper elevation strut hardware
will be attached to the antenna and tightened to the A-325 tensioning procedure at the
time of antenna installation.
Support Plate
3/4” Flat
Washer
1/2 x 1” Bolt and
Flat Washer
3/4” Threaded
Rod
Pivot Block
3/4 x 1-3/4”
Bolt and Nut
Figure 3-8b: Ground Mount Assembly Tiller Arm Hardware
EL SPT Angle
Assembly
3/4 x 2” Bolt and Flat Washer
(2 Washers per Bolt, one each
on Reflector and Mount Side)
AZ Tiller Arm
Weldment
Figure 3-8c: Ground Mount Assembly Elevation Support Angle
22
Installation Procedures
1/2” Flat
Washer
1/2 x 1-3/4”
Bolt and Nut
Universal Terminal
5/16 x 3/4” Hex Head
Screw and Lock Washer
Grounding
Cable
Figure 3-8d: Ground Mount Assembly Tiller Arm Hardware
Left Position
-90° To +30°
Center Position
-60° To +60°
Right Position
-30° To +90°
Figure 3-8e: Ground Mount Assembly Tiller Arm Hardware
23
Installation Procedures
Manual Pedestal
Ground Mount
Assembly
Step 1
Prepare the ground mount hardware in the mount hardware kit by sorting all bolts, nuts,
and flat washers into separate sections as shown in Figure 3-9.
Figure 3-9: Hardware Separation
Step 2
Wax two sides of each galvanized bolt with the stick wax provided. This allows a smooth
installation of each galvanized bolt as shown in Figure 3-10.
Figure 3-10: Waxing Bolts
24
Installation Procedures
Step 3
Position and mount the azimuth tiller arm (P/N 203112) to the tiller-arm bracket on the
left side (facing the satellite) of the ground mount assembly. This mounting position of
the azimuth tiller arm is dependent upon pre-determined azimuth range requirements as
shown in Figure 3-11.
NOTE: The ground mount assembly enables 180 degrees positioning for selected
azimuth viewing. Azimuth range coverage is plus or minus 90 degrees, divided into
three 120 degree continuous ranges with a 30 degrees overlap. Elevation adjustment is
continuous from 0 degrees to 90 degrees.
Figure 3-11: Azimuth Tiller Arm
Step 4
Tighten the hardware using the A-325 tensioning procedure.
25
Installation Procedures
An illustration of the final azimuth tiller arm is shown in Figure 3-12.
Figure 3-12: Azimuth Tiller Arm - Final Assembly
Step 5
Locate the elevation and azimuth struts (P/N 202951-2-manual) as shown in Figure 3-13.
NOTE: The azimuth strut is the strut on the right and the elevation strut is on the left.
Figure 3-13: Elevation and Azimuth Struts
26
Installation Procedures
Step 6
Insert pivot blocks (P/N 205876) onto the end of the azimuth strut using lubricated 1/2
inch bolt, flatwasher and hex nut as shown in Figure 3-14. A 3/4 inch flat washer should
be inserted between the strut and the spacer block. Tighten hardware according to the
A-325 tensioning procedure.
Figure 3-14: Azimuth Strut Assembly
Step 7
Slide the round strut assembly bracket (P/N 203875) on the end of the azimuth strut,
and hand tighten the1/2 inch setscrews before mounting it on the ground mount assembly as shown in Figure 3-15.
Figure 3-15: Azimuth Strut-Bracket Assembly
Step 8
Mount the second azimuth support plate (P/N 205875) pivot assembly to the rear end of
the ground mount assembly as shown in Figure 3-16. Spacer blocks (P/N 205874) and 5/8
inch hardware (hex bolt, flatwasher, hex nut) should be inserted as shown in Figure 3-10.
27
Installation Procedures
Figure 3-16: Azimuth Pivot Assembly
Step 9
Mount the azimuth strut to each bracket on the ground mount assembly as shown in
Figure 3-17a and Figure 3-17b. The front and rear brackets should be aligned as shown
in Figure 3-18.
Figure 3-17a: Azimuth Strut Assembly - Front
28
Installation Procedures
Figure 3-17b: Azimuth Strut Assembly - Rear
Figure 3-18 illustrates a final azimuth strut assembly mounted to the ground mount
assembly.
Figure 3-18: Azimuth Strut Assembly - Final Assembly
29
Installation Procedures
Step 10
The next step is to install the elevation strut assembly. Begin by bolting the elevation strut
tube assembly (P/N 205872) to the ground mount assembly as shown in Figure 3-19.
Figure 3-19: Elevation Strut Pick Up Assembly (Top View)
Step 11
Bolt the elevation bracket-support plates (P/N 205873) to the elevation strut tube assembly using 5/8 inch hardware (hex bolt, flatwasher and nut)as shown in Figure 3-20.
Figure 3-20: Bracket-Support Plates (Top View)
30
Installation Procedures
Step 12
The elevation strut tube assembly should now be bolted to the elevation strut bracket as
shown in Figure 3-21a and Figure 3-21b.
Figure 3-21a: Elevation Strut Bracket
Figure 3-21b: Elevation Strut Bracket
31
Installation Procedures
Manual Actuator
Assembly
Step 1
The manual actuator assembly (P/N 207882) is used to adjust the elevation and
azimuth angles of the 3.7 meter antenna. The following steps provide the procedure
used to assemble and install the manual actuator assembly.
Loosely attach the manual actuator assembly (P/N 207882) to the elevation strut as
shown in Figure 3-22 using clamp segments, 1/4 inch screw, lockwasher and hex nut in
each of the 12 connections.
NOTE: The drain hole should be positioned downward for proper water drainage.
Step 2
Attach the base angle to the actuator (P/N 202661) using 1/2 inch screws, flatwashers
and hex nuts as shown in Figure 3-22. AVOID EXCESSIVE TORQUE ON THE
MOUNTING HARDWARE.
Step 3
Ensure that the locking strut-support setscrew is firmly tightened on the strut assembly
as shown in Figure 3-22.
Figure 3-22a: Manual Actuator Assembly
Figure 3-22b: Manual Actuator Assembly
32
Installation Procedures
Step 4
Remove the two indicated strut-support setscrews, and attach the base angle to the corresponding strut support using the supplied 1/2 inch clamping nuts and the previously
removed strut-support setscrews as shown in Figure 3-22b.
Step 5
Securely tighten the remaining mounting hardware to achieve the clamping force.
Step 6
Follow directions for “Acquiring a Satellite”.
Step 7
Repeat the entire procedure for the remaining strut assembly.
Manual Actuator
Assembly Removal
Step 1
After the adjustments have been made, the manual actuator should be removed. The
following steps provide the procedure for the proper removal of the manual actuator
assembly.
Remove the manual actuator assembly by first removing the hardware securing the
actuator to the base angle.
NOTE: The adjustment kit assembly should be removed after the antenna has been
adjusted. Store the manual actuator assembly and the corresponding hardware in a dry
area for future use.
Step 2
Remove the remaining clamp segments with the corresponding hardware.
Step 3
After the antenna is pointed at the satellite, tighten all azimuth and elevation setscrews
to 35 foot-pounds.
Motorizable
Pedestal Ground
Mount Assembly
If you are assembling a motorizable pedestal mount (P/N 208800) follow the directions
for ground mount assembly before beginning this section. The following steps provide
the procedure for assembling the motorizable pedestal ground mount.
Step 1
Bolt the azimuth pivot assembly (top and bottom) brackets to the ground mount assembly using 5/8 inch hardware (hex bolt, flatwasher and hex nut) as shown in Figure 3-23.
Figure 3-23: Azimuth Pivot Bracket Assembly
33
Installation Procedures
Step 2
Bolt one jack to the azimuth pivot assembly using 5/8 inch hardware (hex bolt, flatwasher and hex nut) as shown in Figure 3-24.
Figure 3-24: Jack Attachment
Step 3
Unscrew the jack using a spud wrench until it meets with the front azimuth strut weldment as shown in Figure 3-25a.
Figure 3-25a: Jack Unscrew Procedure
34
Installation Procedures
Step 4
Place pivot blocks (P/N 205876) on both sides of the jackscrew ends, bolting with lubricated 1/2 inch hex bolt, flatwasher and hex nut as shown in Figure 3-25b.
Figure 3-25b: Azimuth Jack Attachment
Step 5
Tighten the hardware using the A-325 tensioning procedure.
Step 6
Lubricate the jackscrews according to the maintenance instructions.
Step 7
Pull the protective boot over the jackscrew, and clamp at the end as shown in Figure 3-26.
Note: Position condensation drain holes downward.
Figure 3-26: Protective Boot Attachment
35
Installation Procedures
Step 8
Bolt the elevation pivot assembly brackets (P/N 208370 - left and P/N 208371 - right) to
the inside of the ground mount assembly as shown in Figure 3-27.
Figure 3-27: Elevation Pivot Bracket Assembly
Step 9
Bolt the jack to the elevation pivot assembly using 5/8 inch hardware (hex bolts, flatwashers and nuts) as shown in Figures 3-28a and 3-28b.
Figure 3-28a: Elevation Jack
36
Installation Procedures
Figure 3-28b: Elevation Jack
Step 10
Loosen the clamp on the jack boot.
Step 11
Unscrew the jack by using a spud wrench until the jack connects to the back of the
enclosure as shown in Figure 3-28c.
Figure 3-28c: Elevation Jack Extension
Step 12
Tighten the hardware using the A-325 tensioning procedure.
Step 13
Lubricate the jackscrews using the maintenance procedures.
Step 14
Pull the protective boot over the jackscrew, and clamp it at the end as was performed
with the azimuth jackscrew.
37
Installation Procedures
Embedded Pipe
Ground Mount
Assembly
Refer to Figure 3-29a for an overall view of the assembled embedded pipe ground
mount assembly, reflector and subreflector assemblies.
Subreflector
Assembly
Ground Mount
Assembly
Reflector
Assembly
Figure 3-29a: Typical Embedded Pipe Mount Earth Station Antenna
Step 1
Attach the 104320 left side frame, to the 168 tube using four 104326 U-bolts, 100526-51
M16 nuts and 100522-51 lockwashers. Add an 100536-21 M16 X 40 long bolt, 10052651 nut and two 100522-51 lockwashers at the top of the tube, as shown in Figure 329b. Arrange this bolt so that a flat rests on the top of the tube.
M16
Bolt, Lockwashers (2)
and Nut
104320
Left Side Frame
M16
Nut
M16
Lockwasher
104326
U-Bolt
Figure 3-29b: Left Side Frame Attachment
38
Installation Procedures
Step 2
Attach the 104319 front frame to the left side frame as shown in Figure 3-29c. Attach
the 104325 braces to the left side by means of the U-bolts. Attach the right side frame
and braces to the front frame and the right side frame to the left side frame, also shown.
For all of these joints, use 100532-21 M16x40 long bolts, 100526-51 nuts and 10052251 lockwashers. When assembly is in place, tighten to 95 N-m. (70 lbs-ft).
104321
Right Side Frame
104325
Brace
M16
Nut
M16
Hex Bolt
104319
Front Frame
Elevation/Azimuth
Strut Assembly
Step 3
M16
Lockwasher
Figure 3-29c: Front Frame Attachment
Attach 104638 U-bracket to one end of each 301899 support pipe using 100537-87 M20 X
100 hex bolt, 100526-57 M20 hex nut and 100522-57 lockwasher. Attach 301900 strut
bracket to 49258 strut support using 45980-1 .625-11 x 2" long bolt and nut assembly. Note:
Long bolt and nut assembly should not protrude inside diameter of 49258 strut support.
Assemble strut bracket/strut support assembly to support pipe by sliding over strut with
welded tab facing 104638 U-bracket. Snug the strut support in place using 9953-15 .5013 x 1.5" long square head screws in three places. See Figure 3-29d. Note: For elevations above 75° reverse the strut support so the welded tab faces away from U-bracket.
104638
U-Bracket
301899-2
Support Pipe
M20 x 100
Bolt, Lockwasher
and Nut
301900
Strut Bracket
5/8 x 2”
Bolt and Nut Assembly
1/2 x 1-1/2”
Square Head Set Screw
49258
Strut Support
3/4 x 3”
Bolt, Flatwasher,
Lockwasher and Nut
Figure 3-29d: Elevation/Azimuth Strut Assembly
39
Installation Procedures
Step 4
Attach the elevation strut to the top of the rear frame assembly as shown in Figure
3-29e using the 100537-15 M20 x 50 bolt, 100526-57 nut and 100521-57 flatwasher.
Tighten bolts to 185 N•m. (136 lbs-ft).
M20 x 50
Bolt, Flatwasher
Lockwasher and Nut
Figure 3-29e: Elevation Strut Attachment
Attach 301917 elevation axis weldment to the front of the frame assembly in two places
using 100537-15 M20 x 50 long bolt, 100526-57 nut and 100522-57 lockwasher as shown in
Figure 3-29f.
301917
Elevation Axis
Weldment
M20 x 50
Bolt, Lockwasher and Nut
Figure 3-29f: Elevation Axis Weldment Attachment
40
Installation Procedures
Step 5
Attach the azimuth strut to the bottom rear of the frame assembly as shown in Figure 329g, using the 100537-15 M20 x 50 long bolt, 100526-57 nut, 100521-57 flatwasher and
100522-57 lockwasher. Attach the strut to the foundation anchor, as shown in Figure 3-29g.
Step 6
Install 301931 pointer where shown in Figure 3-29g by removing the mount bolt at specified location then reinstalling with 100521-51 flatwasher and pointer. Choose appropriate 221027 azimuth label for antenna location (Northern or Southern Hemisphere) and
attach to 11809-24 clamp. Slide scale behind pipe and align with pointer and tighten.
See Figures 3-29g and 3-29h.
M20 x 50
Bolt, Flatwasher
Lockwasher and Nut
301931
Pointer
M16 Flatwasher
Add Flatwasher When
Replacing Hardware
M20
Flatwasher,
Lockwasher and
Nut
Figure 3-29g: Azimuth Strut/Pointer Attachment
Screw
221027
Azimuth Label
11809-24
Clamp
180° Mark
(For Northern Hemisphere)
or
0° Mark
(For Southern Hemisphere)
Figure 3-29h: Azimuth Label/Clamp
41
Installation Procedures
Step 7
Install fine az. adjustment, attach 40188-3 thread rod to 49712-3 bracket with 9999-167
.75-10 nuts and 9997-166 flatwasher. Slide threaded rod through welded tab and fasten
using 9999-167 .75-10 nuts and 9997-166 flatwasher. Note: It will be necessary to temporarily remove one square head bolt for fine adjusting the threaded rod. After fine
adjustment it is recommended that the fine adjustment rod assembly remain in place. If
the threaded rod is removed the square head bolt must be replaced.
Attach 49712-3 bracket to strut using 9956-67 U-bolt, 9999-109 .50-13 nut and 9974-4
lockwasher. See Figure 3-29i. Repeat for elevation strut.
9997-166
Flatwasher
and
9999-167
3/4” Brass Hex Nut
49712-3
Bracket
40188-3
Threaded Rod
9956-67
U-Bolt,
1/2” Lockwasher
and
1/2” Hex Nut
Figure 3-29i: Fine Azimuth Adjustment Attachment
42
Installation Procedures
The ground mount assembly is now completed with the necessary operational essentials. All ground mount options (such as motors) have separate instructional bulletins
located in the parts kit that contains the option.
The next step in the installation process is the reflector assembly. Proceed to the
instructions on assembling the reflector.
Reflector
The precision-spun aluminum reflector assembly enables ease of installation and
ensures accurate surface contour providing exceptional operating characteristics in the
C-/Ku- frequency band.
NOTE: The instructions below are provided for the split-reflector style 3.7-Meter Earth
Station Antenna. If you are installing the full reflector style, skip this section and proceed
to Step 7.
Unpacking
Upon receiving your 3.7-Meter Earth Station Antenna, notice that it is delivered in a
wooden crate and covered with a white nylon sheath. The protective crate covering
shields the product from being damaged during the shipment process.
While unpacking the shipment, ensure that the correct parts are included by checking
them against the packing list. The following steps provide the procedure for unpacking
the crate.
The crate arrives on site covered in a white sheath (domestic pack) or wood (export
pack). See Figure 3-30a and Figure 3-30b.
Step 1
Remove the protective covering from crate.
Step 2
Pry the top crate panel off with a pry bar.
Figure 3-30a: Domestic Pack
43
Installation Procedures
Figure 3-30b: Export Pack
Figure 3-30c: Unpacking
Step 3
Pry the short ends of the crate off by using a pry bar and hammer as shown in Figure 3-30c.
NOTE: Notice that the parts of your order are boxed and banded to your crate. Remove
these boxes by snipping the banding with tin snips.
Step 4
Take the front, long side of the crate off.
Step 5
Unbolt the reflector halves from the bottom of the crate. DO NOT PRY.
Step 6
Find a flat area for the reflector assembly. The area must be large enough for the reflector halves to lay adjacent to each other. Pieces of wood (such as 2” X 4” pieces) can be
positioned to provide a level surface for the reflector to rest on, which will prevent
scratching of the reflector.
Note: This area must be level or there may be problems in correctly aligning the reflector.
44
Installation Procedures
Step 7
Lay the first half of the reflector (which has the flash located at twelve o’clock) face
down on the blocks of wood.
Step 8
Lay the second half of the reflector face down on the blocks of wood.
Step 9
Unbolt the mounting ring from the crate, and set with the rest of the parts to be assembled.
Step 10
Assembly
Improve timeliness of clean up by discarding unneeded materials while unpacking the
crate. You can place all wood and unneeded materials in one area away from the installation site.
Once the crate has been unpacked, you can begin assembling your Andrew earth station antenna. The reflector halves are placed next to each other to begin the assembly.
The following steps provide the procedure for assembling the 3.7-Meter reflector.
Note: Figure 3-33c provided at the end of this section shows a diagram of the reflector
assembly.
Step 1
Station an installer under the reflector halves to begin the assembly.
Step 2
See that the joint plates are clean, and then bring the reflector halves together aligning
the joint-plate holes.
NOTE: The lip of one half fits over the other half, and the bolts match exactly when
placed together correctly. Additionally, each half has a serial number and a red stripe
that must match to ensure that you have the correct halves in the correct place.
Figure 3-31: Reflector Seam Alignment
45
Installation Procedures
Step 3
Insert all of the joint-plate bolts, except for the socket-head shoulder bolts. All bolts
should be inserted from the same direction using a 5/16 inch hardware—flat washer
under a lock washer and nut. DO NOT TIGHTEN.
Note: DO NOT force bolts—manipulate reflector halves to allow free insertion.
Step 4
At both antenna seams, loosely install three location bolts and nuts (5/16 inch hardware)
adjacent to the center hole as shown in Figure 3-32.
NOTE: The installer positioned under the reflector should insert the bolts from the
underside, while the second installer inserts the flat washers under lock washers and
nuts from the outside.
Figure 3-32: Seam Bolt Insertions
46
Installation Procedures
Step 5
VERY IMPORTANT
Add the alignment hex bolts to the end holes of the joint plates as shown in Figure 333a (outside and inside of plate) to ensure that it is evenly aligned; and use hex bolts to
fill the rest of the joint plates as shown in Figure 3-33b. THESE MUST NOT BE DRIVEN, BUT INSERTED BY HAND.
NOTE: All bolts should be inserted from the same direction using a bolt, flatwasher
under a lockwasher and nut on joint plate and a bolt and locknut on the seam.
Figure 3-33a: Alignment Bolt Insertions
Figure 3-33b: Alignment Bolt Insertions
47
Installation Procedures
Splice Strip and Mounting Ring
Hardware Tapered M6 x 1.0 (25 mm)
Location Bolts, Washers for Mounting
Ring Attachment Only, and Lock Nuts
Joint
Plates
Seal Seam All
Around Ring
Mounting Ring
Tabs
Red Line
Match Marks
Serial No.
(On Joint Plates)
Splice Strip
Serial No.
Joint Plate Hardware
(2) 0.31 x 1.25 (32 mm) Socket Head Shoulder Bolts
(7) 0.31 x 1.25 (32 mm) Bolts Plus Flat Washers,
Lock Washers and Nuts
Figure 3-33c: Alignment Bolt Insertions
Figure 3-33d: Alignment Bolt Insertions
Step 6
Tighten the hardware if the seam is correct starting from the center and working towards
the outside of the reflector. Before tightening hardware, verify that the reflector seam
gap is even along its length. Push from both directions of the seam if necessary.
NOTE: The installer positioned inside the reflector must hold the bolt head with a
wrench, while the nut on the outside is tightened.
48
Installation Procedures
Step 7
Add the reflector-mounting ring to the assembled reflector. Notice that the notches in the
mounting ring fit over the reflector seam indicating where the mounting ring should be
placed. There is also a red stripe placed on the mounting ring. This red stripe must be
aligned with the red stripe on the reflector as shown in Figure 3-34a. When all bolts are
inserted, tighten in a clockwise sequence, tabs on the mounting ring must be flush with
the reflector as shown in Figure 3-34b.
Figure 3-34a: Mounting Ring Placement
Figure 3-34b: Mounting Ring Placement
49
Installation Procedures
Step 8
Mount the front (P/N 202790) and back hub-mounting ring (P/N 49965) to the reflector
with the appropriate hardware as shown in Figures 3-35a and b.
NOTE: These components are included as part of P/N 206319 Feed Hardware Kit.
For K-Band Antennas, these components are included as part of P/N 301544 Feed
Hardware Kit (2-Port) or P/N 301515 Feed Hardware Kit (4-Port).
1/4-20 x 1-1/2”
Bolts, Flatwashers and Nuts
(12 places)
Front Hub
Mounting Ring
Back Hub
Mounting Ring
Flatwashers
Lockwashers
Nuts
Figure 3-35a: Mounting and Center Rings
Step 9
Reflector
Side View
Figure 3-35b: Mounting and Center Rings
For equipment enclosure versions only, apply a smooth, continuous bead of RTV
sealant to the inside of the reflector mounting ring to seal the reflector and the mounting
ring seam as shown in Figure 3-36.
Figure 3-36: Mounting Ring Sealant (Equipment Enclosure Versions Only)
50
Installation Procedures
Alignment Test
As a final test of proper reflector alignment, Andrew recommends that a string test be
performed. The following steps provide the procedure for the string test.
Step 1
Attach a string at the twelve o’clock position of the reflector stretching to the six o’clock
position of the reflector.
Step 2
Attach a second string at the three o’clock position stretching to the nine o’clock position.
Step 3
Verify its intersection to the first string as shown in Figure 3-37. If the strings touch, then
the reflector has been correctly aligned. If they do not touch, then check all previous
steps to ensure proper assembly before continuing.
NOTE: A 1/16 inch gap is permitted.
Figure 3-37: Reflector Alignment
Step 4
Reposition the first string above the second string to check the accuracy of the first test.
NOTE: The reflector should be facing downward when the string test is performed. The
person that is positioned under the dish should ensure that the strings are aligned correctly during the test.
You have completed the assembly of the reflector. Proceed to the next page for instructions on the enclosure assembly.
51
Installation Procedures
Enclosure
(Pedestal Mount
Only)
The enclosure (P/N 202934A) assembly attaches to the rear of the reflector. The enclosure provides weather protection for RF equipment and can accommodate up to a 4port combiner network. An example of the assembled enclosure is presented in Figure
3-38a and Figure 3-38b.
Figure 3-38a: Enclosure - Final Assembly
Figure 3-38b: Enclosure - Final Assembly
Before assembling the enclosure, verify that the appropriate parts are present. The following steps provide the procedure for the enclosure assembly.
Step 1
Remove the rear covers and corresponding side panels from the enclosure assembly.
52
Installation Procedures
Step 2
Raise the enclosure assembly, and attach to the mounting ring on the reflector using the
appropriate hardware as shown in Figure 3-39a and Figure 3-39b.
VERY IMPORTANT
Figure 3-39a: Enclosure Hardware
Figure 3-39b: Enclosure Hardware
53
Installation Procedures
Step 3
Install the supplied sealant backing rod material around entire circumference of the
mounting ring/enclosure mating surfaces as shown in Figure 3-40.
Figure 3-40: Backing Rod Assembly
Step 4
Securely tighten the enclosure mounting hardware using the A-325 tensioning procedure.
Step 5
Apply the supplied RTV sealant around the outer perimeter of the reflector-mounting
ring/enclosure assembly junction as shown in Figure 3-41.
Figure 3-41: RTV Sealant
You have now completed the assembly of the enclosure and have mounted the enclosure to the reflector. Proceed to the next page for instructions on mounting the reflector
to the ground mount assembly.
54
Installation Procedures
Reflector-to-Mount
Assembly
Using a Crane
Step 1
The reflector can be installed on the mount manually or by using a crane. However,
Andrew recommends that this procedure be performed using a crane.
The following steps provide the procedure for installing the reflector to the mount using
a crane.
Route a sling through the upper holes in the reflector torsion box assembly, and connect
the ends using a 5/8 inch shackle as shown in Figure 3-42.
NOTE: If using a steel sling, install foam pad protection in the upper reflector torsion
box holes under the sling to avoid disfiguration of the reflector.
Figure 3-42: Sling Placement
Step 2
Route two rope tag lines through two consecutive holes in the torsion box assembly to
be used as guides when the reflector is lifted with a crane.
Figure 3-43: Safety Rope Tag Lines
55
Installation Procedures
Figure 3-44a: Crane Lift
Step 3
Verify that all hoist assembly hardware is fully in tact before lifting the reflector to avoid
personal injury or damage to the reflector.
Step 4
Route the crane’s cable and hook from the hoist over the slings, and attach the shackle’s hook to the crane’s hook for raising the reflector.
Step 5
Position a person at the end of each tag line to guide the reflector as it is being lifted,
and position another person on the mount to crank the hoist.
NOTE: The crane’s hook must be perfectly aligned with the top of the reflector’s hook
so that it can be lifted straight up.
Figure 3-44b: Crane Lift
56
Installation Procedures
Figure 3-44c: Crane Lift
Without a Crane
The following steps provide the procedure for installing the reflector to the mount without the use of a crane.
Step 1
Route one rope tag line through two consecutive holes at the top of the reflector in the
torsion box assembly.
Step 2
Place foam blocks (provided as packaging material) on the bottom lip of the reflector
(between the ground mount and the reflector) to prevent the reflector from scraping the
ground as it is lifted.
57
Installation Procedures
Step 3
Position three people at the top of the reflector to lift the reflector on its end, facing forward as shown in Figure 3-45.
Figure 3-45: Manual Lift of the Reflector to the Mount
Step 4
Position one person (of the three) on the mount to guide the reflector to the mount.
Refer to Figure 3-46.
Figure 3-46: Reflector to Mount
58
Installation Procedures
Step 5
Align the enclosure bracket to the ground mount assembly. The left bolt should be
inserted to hold reflector in place using 3/4” A-325 hardware (hex bolt, flatwasher and
nuts as shown in Figure 3-47 and Figure 3-48.
Figure 3-47: Enclosure Bracket
Step 6
Have the two people on the ground rotate the reflector to connect with the right bolt of
the enclosure bracket against the ground mount angle bracket. Facing the reflector, the
right bolt should be inserted to hold the reflector in place using the appropriate hardware.
Figure 3-48: Enclosure Bracket Alignment
59
Installation Procedures
Step 7
Extend the elevation strut or elevation jackscrew, and attach it to the top rear of the
enclosure assembly as shown in Figure 3-49.
Figure 3-49: Elevation Jack/Enclosure Attachment
Step 8
Tighten the hardware using the A-325 tensioning procedure.
Step 9
Carefully raise the reflector/enclosure assembly to the zenith (elevation = 90 degrees)
position, and securely tighten the strut-support setscrews to 40 foot-pounds.
Step 10
Remove all hoisting apparatus.
60
Installation Procedures
The Reflector-to-Mount components can be verified and/or clarified in the following diagram.
Figure 3-50a: Reflector to Mount
61
Installation Procedures
Reflector-to-Mount
Assembly
Embedded Pipe
Ground Mount
Step 1
Lift the reflector carefully onto the mount as shown in Figure 3-50b. Secure the reflector
to the mount using 100537-15 M20 x 50 long bolts, 100526-57 nuts and 100522-57
lockwashers in three places. Tighten these three to 38 N•m.
M20 x 50
Bolt, Lockwasher
and Nut
Elevation Fine
Adjustment
M20 x 50
Bolt, Flatwasher,
Lockwasher
and Nut
Figure 3-50b: Reflector to Mount
You have now completed the attachment of the reflector to the ground mount assembly.
Proceed to the instructions on assembling and attaching the subreflector to the reflector.
62
Installation Procedures
Subreflector
Once the reflector has been assembled to the mount, the subreflector must be installed.
Figure 3-51 presents a final subreflector assembly.
Figure 3-51: Installed Subreflector
The following steps provide the procedure for assembling the subreflector.
Step 1
Loosely preassemble the subreflector strut weldment (P/N 202775) using the supplied
strut angles (P/N 202776) and the 3/8 inch by 2-1/4 inch bolts, lock washers, and nuts
as shown Figures 3-52a and 3-52b.
Figure 3-52a: Subreflector Strut Assembly
63
Installation Procedures
Figure 3-52b: Subreflector Strut Assembly
Step 2
Position and attach the subreflector-mounting ring (part of 205929 subreflector assembly) to the corresponding mounting holes in the strut-support plates using 3/8 inch by 1
inch bolts, oversized flat washers, lock washers, and nuts as shown in Figure 3-53a and
Figure 3-53b.
NOTE: Ensure that one subreflector adjustment stud is located at the six o’clock position.
Figure 3-53a: Subreflector Assembly
64
Installation Procedures
Figure 3-53b: Subreflector Assembly
Step 3
Attach the angle clips (P/N 49187) around the reflector perimeter at the indicated positions using the appropriate hardware as noted in Figure 3-53c.
Figure 3-53c: Subreflector Assembly
65
Installation Procedures
Step 4
Raise and attach the preassembled subreflector strut assemblies between the corresponding angle clips using a tag line as shown in Figure 3-54a. The angle clips should
correspond with the holes in the reflector.
NOTE: Ensure that one subreflector adjustment stud is located at the six o’clock position.
Figure 3-54a: Subreflector Attachment
66
Installation Procedures
Subreflector
Struts
Embedded Pipe
Ground Mount
Assembly
Step 1
Loosely preassemble the 300056 Subreflector Struts using supplied 222888 strut supports and the 9963-127 3/8 inch by 2 1/4 inch bolts, 9974-63 lockwashers, and 9999-60
nuts as shown in Figure 3-54b, View A.
Note: At this time it is recommended (but not necessary) to install the Subreflector, for
K- & Ku-Band, see Kit #301921; for C-Band, see Kit #301939.
Step 2
Attach the 49187angle clips around the reflector perimeter at the indicated positions
using 100521-51 3/8 x 1 inch bolts, 9974-63 lockwashers and 9999-60 nuts. See View
B in Figure 3-54b.
3/8 x 1”
Bolt, Lockwasher
and Nut
49187
Angle Clip
3/8 x 2-1/4”
Bolt, Lockwasher
and Nut
300056
Subreflector Strut
222888
Strut Supports
3/8 x 2-1/4”
Bolt, Lockwasher
and Nut
Figure 3-54b: Subreflector Strut Attachment
Step 3
Raise and attach the pre-assembled Subreflector strut assemblies between the corresponding 49187 angle clips using a tag line. Attach struts between angle clips using
9963-127 3/8 x 2 1/4 inch bolts, 9974-63 lockwashers and 9999-60 nuts.
Step 4
Tighten strut and all hardware at this time.
67
Installation Procedures
Subreflector
Adjustment
After the subreflector assembly has been attached to the reflector, the subreflector must
be adjusted to ensure correct alignment. The following steps provide the procedure for
adjusting the subreflector.
Step 1
Position the supplied setting bar (P/N 203896 Ku-band, P/N 203896-3 C-band) ) on the
outer edge of the subreflector as well as on the outer edge of the front ring (P/N
202790) at the twelve o’clock (top) position.
Step 2
Sweep the bar across the corresponding subreflector edge, and note the relative position.
Step 3
Repeat this procedure at the six o’clock (bottom) position.
Step 4
Use the noted position to indicate the required directional movement of the top portion
of the subreflector aperture, which is relative to the aperture bottom using the subreflector stud-adjustment hardware (3 places) as shown in Figure 3-55.
Figure 3-55: Subreflector Alignment
Step 5
Repeat Steps 1-4 at the three o’clock and the nine o’clock positions to indicate the proper aperture side adjustment.
68
Installation Procedures
Step 6
Repeat the entire procedure until all four noted positions indicate that the subreflector
aperture is set parallel to the ring (P/N 202790) as shown in Figure 3-56.
Step 7
Temporarily tighten the adjustment hardware until after step 10 has been completed.
Figure 3-56: Subreflector Alignment
Step 8
Measure and note the distance between either outermost angle clip bolt head and the
subreflector rim.
69
Installation Procedures
Step 9
Obtain the corresponding measurements from the remaining subreflector struts, and
adjust the subreflector mounting hardware (4 places) to achieve a maximum differential
of 1/16 inch.
Step 10
Repeat the adjustment procedure performed in Steps 1-4, until all areas of the subreflector are uniform.
Step 11
Adjust the jam nuts, and securely tighten the adjustment hardware.
46.925”
47.2”
Figure 3-57: Subreflector Alignment
Feed System
You have now completed the subreflector assembly. By now, you can see that your
installation of the 3.7-Meter Earth Station Antenna is almost complete. The feed system
is the last phase of the base installation. NOTE: All antenna options (such as feed systems, motors, anti-icing, etc) possess installation instructions within the individual kits
contained in the shipment.
70
Installation Procedures
Operation
Overview
After you have completed the assembly of your antenna, you are now ready to become
operational. In order to operate the earth station antenna, you will need to direct it to the
desired satellite adjusting both the elevation and azimuth angles appropriately. The following procedures provide details on how to correctly position your antenna on the
desired satellite.
Acquiring A
Satellite
NOTE: Ensure that the feed system and all electronics are installed properly before proceeding.
Follow the procedures listed below when acquiring the desired satellite:
Step 1
Evaluate and determine the required elevation and azimuth angles for the satellite
of interest.
Step 2
Loosely attach the manual actuator assembly (P/N 207882) to the elevation strut as
shown in Figure 3-22 using the appropriate hardware.
NOTE: The drain hole should be positioned downward for proper water drainage.
Step 3
Ensure that the locking strut-support setscrew is firmly tightened on the strut assembly
as shown in Figure 3-22.
Step 4
Remove the two indicated strut-support setscrews, and attach the base angle to the corresponding strut support using the supplied 1/2 inch clamping nuts and the previously
removed strut-support setscrews as shown in Figure 3-22.
Step 5
Securely tighten the remaining mounting hardware to achieve the clamping force.
Step 6
Repeat the entire procedure for the remaining strut assembly.
NOTE: DO NOT loosen the Azimuth drive bearings.
Step 7
Move the antenna to the desired azimuth angle by adjusting the manual actuator until
the satellite signal has been spotted.
There are several procedures that may be used to properly acquire the satellite. Andrew
recommends that a spectrum analyzer be used. The following procedures provide
explanation as to how to use the spectrum analyzer.
While viewing the spectrum analyzer screen, a pure noise signal as shown in Figure 4-1
will probably be observed. Additionally, some transponder signals may be observed
above the noise signal as shown in Figure 4-2.
71
Operation
Figure 4-1: Pure Noise Signal on Spectrum Analyzer
Figure 4-2: Minimum transponder Signal on Spectrum Analyzer
72
Operation
The following steps provide the procedure for acquiring a satellite.
Step 1
Manually move the antenna in the azimuth (scanning back-and-forth) to achieve the
maximum (greatest amplitude) transponder signals.
• Scan in one direction until the amplitude continues to diminish and then scan in the
opposite direction until the same condition occurs.
• Return to the position yielding the greatest amplitude.
The maximum azimuth excursion from the original setting should not exceed plus or
minus 1.5 degrees or the antenna may begin to access a different satellite.
Step 2
With the antenna positioned in azimuth such that the transponder signals are maximized, follow the same procedure manually moving the antenna in elevation (scanning
up-and-down) to further maximize the transponder signals.
Step 3
Repeat this procedure alternating between the azimuth and elevation excursions of the
antenna to peak the transponder signal amplitude.
A transponder signal amplitude of 30 dB or greater from peak to average noise signal
indicates the antenna is receiving the signal on the main beam. A transponder signal
amplitude less than 30 dB or greater indicates the antenna is receiving the signal on a
side lobe of the main beam.
Step 4
With the antenna peaked on a side lobe in azimuth and/or elevation, move the antenna
in azimuth while observing the spectrum analyzer screen as shown in Figure 4-3.
Figure 4-3: Antenna Radiation Pattern Topographical Diagram with Plan View
73
Operation
Step 5
If the signal amplitude diminishes and does not increase (position B) to the level noted
when the antenna was peaked on the side lobe, the antenna is moving away from the
main beam; reverse the direction of the antenna movement.
From the original side lobe position (position A), the signal amplitude should now diminish to a null point at position C (minimum amplitude showing only signal noise) and then
symmetrically increase again to the same level at position D as noted at position A. At
the null point (position C), the antenna is aligned with the alternate (elevation) axis. If
the antenna was peaked on a side lobe in azimuth, it was appropriately aligned with the
elevation axis; proceed with step 6. If the antenna was peaked on a side lobe in elevation, it was appropriately aligned with the azimuth axis; proceed with step 6 moving the
antenna in azimuth rather than elevation.
Step 6
Move the antenna in elevation while observing the spectrum analyzer screen. If the signal amplitude increases, deceases and then increases again but to a lesser value, the
antenna is moving in the wrong direction; reverse the direction of the antenna movement. From the original null point, the signal level should increase and decrease alternately, but with increasing amplitude until the transponder signal increases to a level of
at least 30 dB at which time the main beam. Continue to manually peak the signal to a
maximum level using the azimuth and elevation adjustments.
Step 7
If the antenna is aligned in azimuth and elevation (signal maximized) and 24 transponder signals (12 horizontal and 12 vertical) are noted, the polarization adjustment is set
incorrectly and must be modified. If 12 transponder signals are noted, they may or may
not be the properly polarized signals. Therefore 24 transponder signals must be visually
noted in order to determine the proper polarization setting.
Step 8
Rotate the feed assembly clockwise until 24 transponder signals are noted and of
approximately equal amplitude.
NOTE: It is more accurate and visually easier to minimize the alternate set of transponder signals rather than maximizing the transponder of interest.
Figure 4-4: Polarization at 45 degrees from Optimum Setting
74
Operation
Step 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 are maximized.
Figure 4-5: Maximizing Odd Transponders
Figure 4-6: Optimum Polarization Setting
75
Operation
Manual Actuator
Assembly Removal
After you have successfully acquired the satellite and all adjustments have been made, the
manual actuator should be removed. The following steps provide the procedure for the proper removal of the manual actuator assembly.
Step 1
Remove the manual actuator assembly by first removing the hardware securing the actuator
to the base angle.
NOTE: The adjustment kit assembly should be removed after the antenna has been adjusted. Store the manual actuator assembly and the corresponding hardware in a dry area for
future use.
Step 2
Remove the remaining clamp segments with the corresponding hardware.
Step 3
After the antenna is pointed at the satellite, tighten all azimuth and elevation setscrews to 35
foot-pounds.
Embedded Pipe
Ground Mount
Elevation
Adjustment
Step 1
Loosen the M20 elevation hinge bolts slightly. If coarse adjustment (i.e. more than ± 7.5)
is required then loosen the three square head bolts, and u-bolt to threaded rod, make
adjustment then re-tighten U-bolt. Fine adjustment is performed by working brass nuts
on either side of bracket/U-bolt assembly to push or pull antenna.
Step 2
Finally, tighten the M20 elevation pivot bolts to 185 N•m. (136 lbs-ft) and check all other
fasteners relating to the elevation strut.
Azimuth
Adjustment
Step 1
Conclusion
Slightly loosen the eight M16 nuts on the main azimuth hinge u-bolts and square head
bolts and nut, connecting bracket to concrete. Operate the azimuth adjustment strut in
the same manner as the elevation adjuster. When adjustment is complete, tighten the
square head bolts and nut, connecting bracket to concrete and finally tighten the eight
nuts (M16) on the u-bolts to 95 N•m. (70 lbs-ft)
Check that the fasteners on the mount are tightened to the following torque levels:
M16 - 95 N-m (70 lbs-ft)
M20 - 185 N-m (136 lbs-ft)
76
Operation
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. Using
the provided setting bar and procedures will correctly place the subreflector.
Before proceeding, azimuth and elevation patterns should be conducted to determine the
adjustments that need to be made. The goal is to achieve a high peak on the main lobe and
even distances between the main lobe and sidelobes as shown in Figure 4-6.
NOTE: No adjustments should be made in the receive band.
If your pattern dictates a need to adjust the azimuth angle(the left sidelobe requires adjustment), the west side of the subreflector should be adjusted outward by loosening the screws
on the subreflector and adjusting the left side outward. An easy way to remember this
adjustment feature is through the acronym WOLD (West Out Left Down).
If your pattern dictates a need to adjust the elevation angle(the right sidelobe requires adjustment), the bottom side of the subreflector should be adjusted downward by loosening the
screws between the subreflector and the struts and adjusting the bottom side of the subreflector downward. An easy way to remember this adjustment is through the acronym BOLD
(Bold Out Left Down).
Each of these adjustments should be repeated until each sidelobe is of equal distance from
the peak of the mainlobe.
After the BOLD and WOLD adjustments have been made, it may be necessary to adjust the
main lobe. The goal is to achieve a high null depth (distance between lower intersection of
sidelobes and top of main lobe) as shown in Figure 4-6.
In order to adjust the main lobe pattern characteristics ALL subreflector adjustment screws
should be adjusted at the same degree (Note: Because the azimuth and elevation adjustments have been set, it is very important that the null depth adjustment be carefully conducted. Be careful not to alter any previous adjustments that have been made to the subreflector.
Follow the procedure listed below when adjusting the null depth of the main lobe.
C-band feeds - Adjustment screws are 3/4 X 10. Move 1 turn per 1dB of imbalance.
Ku-band feeds - Adjustment screws are 1/4 X 20. Move 1 turn per 1 dB of imbalance.
All adjustments should be continued until the desired pattern is achieved. Upon completion
the antenna should be properly aligned with the satellite for maximum performance.
77
Operation
Preventive Maintenance
Overview
This section contains periodic preventive maintenance instructions for the 3.7-Meter
Earth Station Antenna. Included in this section are inspection and preventive maintenance procedures including cleaning and lubrication, painting, and an operational voltage/current checkout procedure deemed within the capabilities of the average station
technician. Refer to applicable vendor manuals for any repair procedures not included in
this section yet designated as capable off being performed in the “field” rather than
requiring specialized facilities, tools, and/or test equipment as well as technically trained
personnel.
An operational checkout procedure provides an accurate indication of the overall earth
station performance and should be performed at intervals of approximately three
months. This procedure is essentially performed during the various modes of normal
operation of the earth station. In addition, the operational checkout procedure should be
performed after any repairs or adjustments have been made, or whenever the earth station is suspected of degraded operation. If any discrepancy in performance exists and
the condition cannot be readily remedied to return the earth station to a proper operating
condition, the appropriate troubleshooting procedures should be referenced to locate the
fault. After the trouble is determined and the repairs affected, a final operational checkout procedure should be performed to verify that all discrepancies have been corrected.
The following paragraphs describe the inspection and preventive maintenance procedures for the earth station. These instructions include general cleaning and inspection,
the preservation of metal parts and lubrication. Periodic replacement of assemblies or
components as a preventive measure is not required. Malfunctions of the earth station
can be traced to components, assemblies, and parts through the use of applicable troubleshooting procedures.
General Cleaning
Electrical Parts
To prevent the excessive accumulation of dust and dirt as well as the removal of such
contaminants, thoroughly clean the equipment whenever visually inspecting the earth
station components. No special cleaning procedures are required. However, a thorough
cleaning in accordance with the following procedures is required to assure continued
trouble-free operation.
Minor cleaning, such as the removal of dust and loose foreign particles can be accomplished by one of the following:
• Vacuuming
• Using a soft brush or lint-free cloth
• Blowing out the dust and dirt with low pressure (5 to 25 psi), dry compressed air
When using air to blow off the contaminants, either avoid or be careful when directing
the air stream on delicate parts. To remove imbedded dirt, grease, or oil from electrical
parts; use a 50 percent solution of isopropyl (rubbing) alcohol and apply with a soft bristle brush. It may be necessary to brush some parts vigorously with a stiff bristle brush to
remove imbedded and hardened dirt particles. If possible, avoid excessive use of cleaning solvent on electrical insulation. After cleaning, allow the cleaned parts to dry for 10 to
15 minutes before placing the equipment into operation.
78
Preventive Maintenance
Mechanical Parts
Clean mechanical parts by first removing dust, dirt, and other loose contaminants with a
scraper, stiff brush (bristle or wire in the case of rust or other corrosion), or cloth or compressed air at 25 to 40 psi. Any accumulated imbedded dirt, corrosion, grease, or oil
deposits that require further cleaning may be removed with a bristle or wire brush and a
cleaning solvent such as trichlorethylene or equal. After cleaning, allow cleaned parts to
dry for 10 to 15 minutes before placing the equipment into operation.
Inspection
The frequency of inspection is contingent upon the user’s individual standards and the
operational environment in which the earth station is located. However, a visual inspection of the earth station components should be performed at least semi-annually. Where
there are no established wear limits, perform a visual inspection to locate worn or damaged parts which could cause improper functioning of the earth station. It is recommended that the mechanical and electrical inspection be performed on the assembled or partially disassembled equipment to determine the extent of disassembly required prior to
completely disassembling a suspected malfunctioning component or module. In the
absence of any special inspection requirements, operational tests are the most effective
means in isolating parts and assemblies requiring further inspection. Any condition
noted during inspection that may preclude continued proper operation of the earth station prior to the next scheduled inspection should be noted. The discrepant condition
should be corrected (repaired or replaced) immediately or at the conclusion of the
inspection procedure.
Local
Control/Motor
Drive Controller
Inspection of the local control/motor drive controller conforms generally to standard visual inspection procedures on electromechanical equipment. In addition to these standard
procedures, perform the following checks and visual inspections for the specific conditions noted:
• Check the front panel for illegible and indistinct panel markings.
• Check the three position selector switches (Azimuth Off/Slow/Fast, ElevationOff/Slow/Fast, and Polarization-CCW/Off/CW) for smooth operation, audible clicking at
each actuation (left to center and return) and spring return from right to center. For each
of the two position selector switches (Azimuth-East/West, Elevation-Up/Down, and
Local/Remote) check for smooth operation and audible clicking at each actuation.
•
Inspect all wiring and cables for discolorization and burned insulation, dirt, breaks,
security of connection and other signs of deterioration. Examine connections for dirt,
flux, corrosion, and mechanical defects. Check for loose or broken lacing and cut, brittle,
abraided, frayed, or cracked insulation.
•
Examine connectors for corrosion, broken inserts and stripped threads. Check connector shells for distortion and dents, and contact pins for bends, misalignment, or other
deformities. Check connector inserts for carbon tracking indicating arc-over.
•
Check all electrical components for dirt, cracks, chips, breaks, discoloration and other
signs of deterioration and damage. A discolored, blistered, or burnt condition is evidence
of overload. Measure actual value of suspect electrical components and compare
against specified value.
79
Preventive Maintenance
•
Check transformer for an excessive wax deposit on the surface, discoloration, or a
pungent odor indicative of burning vanish denoting overheating or a total breakdown.
•
Check all terminal boards for broken or missing terminals and stripped threads. Check
tightness of lead attaching hardware.
•
Check each starter for a make-after-break provision through the release of one pushbutton as the alternate pushbutton is pressed.
•
Check the relays and contactors for free operation of the armatures and contact condition. The contacts are usable even though pitted, burned, worn, or discolored. The
contacts or contactor or relay assembly should be replaced only when the contact material has been completely torn away or worn off.
•
Visually inspect all mechanical parts for freedom of operation without binding or interference. Check for security of all hardware and stripped or otherwise damaged threads.
Check metallic parts for corrosion, dents, distortion, and other deformation.
•
Check for evidence of water inside the enclosure. If any water is in evidence, check
that all seals are intact and if not, use a coating of RTV-108 (silicone rubber sealant) to
seal any exposed electrical fitting, bolt hole, or other possible water entry to the
enclosed electrical components in order to maintain a waterproof condition.
•
Antenna
Check or change humidity absorber.
Inspection of the antenna conforms generally to standard visual inspection procedures
performed on electromechanical equipment. In addition to these procedures, perform
the following checks and visual inspections for the specific conditions noted:
•
Inspect all wiring and cables particularly the network to enclosure and enclosure to
mount interfaces for discoloration and burned insulation, moisture entry, corrosion, dirt,
breaks, security of connection, and other signs of deterioration. Examine connections for
dirt, corrosion, and mechanical defects. Check for loose or broken lacing and cut,
abraided, frayed, brittle, and cracked insulation.
•
Examine connectors for corrosion, broken inserts and stripped threads. Check connector shells for distortion and dents, and contact pins for bends, misalignment or other
deformities. Check connector inserts for cracks, and carbon tracking, burns or charring
indicating arc-over.
•
Check all electrical component for dirt, cracks, chips, breaks, discoloration, and other
signs of deterioration and damage. A discolored, blistered, or burnt condition is evidence
of overload.
80
Preventive Maintenance
•
Operate the azimuth and elevation drives as well as the feed rotation in both the plus
and minus direction from the local control/motor drive controller at least once every
three months during antenna down time. Check the mechanical limit switches provided
at the end points stop antenna and feed movement, and limit travel to prevent structural
interference and damage. Check the mechanical limit switches for corrosion and water
entry and the arm on each feed limit switch for free movement without binding. Be certain both feed rotation limit switch arms are not distorted and ride centrally on the actuating cam to open their corresponding limit switch.
•
Inspect the azimuth and elevation jackscrew boots for security of attachment at both
ends, for abrasion, tears, cuts, brittleness and other damage that may expose the
jackscrew to the environment (water, dust, etc.). Minor repairs can be made with RTV108 silicone rubber sealant.
•
Visually inspect the feed window for dirt and the feed, feed supports, feed window,
and reflector for distortion, foreign object damage and environmental deterioration due
to ice and snow, dust, rain, hail, and high winds, etc. which may cause electrical component and/or structural deformation.
•
Check the cable attachment to the resolvers and to the LNA or LNB’s and enclosure
mount interface for security, the cable rouging for secure hanger attachment and the
cable insulation for cuts, cracking, abrasion, and other deterioration. Check the LNA or
LNB’s and the resolvers for a secure mechanical attachment. Ensure proper torquing of
polarization drive gear box setscrews and appropriate tensioning of corresponding drive
chain assembly, if applicable.
•
Check (if applicable) that the drain holes in the bottom of the enclosure are not
obstructed and there is no evidence of water accumulation. Check the enclosure doors
for proper closure and that the door seals are intact, not torn, abraided or otherwise
damaged. Check that all other seals are intact and if not, use a coating of RTV-108 (silicone rubber sealant) to seal any exposed electrical fitting, bolt hold, or other possible
water entry to electrical components in order to maintain a weatherproof condition. If the
enclosure is provided with a vent fan, check for free operation of the fan blade. The fan
bearings are permanently lubricated; any binding, abnormal noise or vibration necessitates replacement of he fan assembly. Check and replace the fan filter element if it
appears dirty or obstructed with dust.
•
Check for the appearance of surface lubricants that will cause the accumulation of dirt
and grime. Clean off all excess surface lubricants with a cloth and if required, a cloth
dampened not wetted with trichlorethylene, or equal.
•
Visually inspect all mechanical parts for freedom of operation with no misalignment,
binding or interference. Check all cabling for sufficient slack to prevent cable strain as
well as adequate restraint to prevent abrasion or chaffing during antenna and feed
movement.
81
Preventive Maintenance
•
Check security of antenna mounting and interconnecting assembly hardware. Be certain all electrical grounding connections (including cross-axis grounding straps) are
intact and secure, not corroded or broken. Thoroughly clean any noticeable corroded
portions of grounding cables, unplated portion of universal terminals and corresponding
mounting surfaces using a wire brush. Replace rather than tighten any loose A-325
structural hardware. The hardware distorts at initial installation and once loosened will
not maintain the required high strength friction connection. All other assembly and installation hardware should be tightened to its original torqued condition. When installing
new structural hardware, do not use a wrench with a lever arm longer than two feet.
•
Examine painted aluminum and galvanized surfaces and tough-up where required.
Drive System
Voltage and
Current Checks
At the conclusion of the installation procedure prior to turning the system over to the station facility, an installation acceptance check off sheet was prepared and duly signed off
if installed by Andrew crew. Part of this check off included voltage readings retaken to
determine if proper voltage was available. Current readings were also taken as a reference for future comparison to serve as a troubleshooting aid in determining possible
equipment degradation and shortened life. Any current reading taken during the following procedure that varies by more than five percent from the pre-established reference
values necessitates troubleshooting the particular system involved to determine the
cause and required corrective action.
Step 1
Approximately every three months and during a period of down time, disconnect as
applicable the RF transmitter and all power supplies. The main disconnect switch in the
main load center box at the antenna site must be in the ON position and the
LOCAL/REMOTE switch in the local control motor drive controller must be in the LOCAL
position.
Step 2
Open the outer local control/motor drive controller door at the antenna site to gain
access to the conductors supplying power to the azimuth, elevation, and polarization
drive motors.
NOTE: During the following procedures, the antenna drives (azimuth, elevation, and
polarization) will be powered to rotate the antenna and feed in both directions of travel.
Check that this condition can be tolerated from a safety as well as an operational standpoint, and that the electrical limits are not reached before the testing is concluded.
Reaching an electrical limit before concluding a test necessitates rotating the antenna or
feed in the opposite direction a sufficient distance to permit retesting in the desired
direction.
Step 3
Turn the FEED CCW/OFF/CW switch to either the CW or CCW position and while the
feed is rotating, carefully use a clamp on ammeter in accordance with the ammeter manufacturer’s instructions to take current readings off each of the three conductors (phases)
connected to the load side of the polarization motor circuit breaker. Record the current
draw in the equipment log and compare the readings to the reference values entered in
the installation/acceptance check off. If the readings differ by more than five percent,
refer to appropriate troubleshooting information and perform applicable corrective action.
Then take voltage readings off each of the three conductors; the readings should agree
with each other within two percent. Turn the FEED CCW/OFF/CW switch to OFF.
82
Preventive Maintenance
Step 4
Repeat preceding step (3) with the FEED CCW/OFF/CW switch in the alternate operating position.
Step 5
Turn the AZIMUTH EAST/WEST switch to either position and while the antenna is rotating, carefully use a clamp on ammeter in accordance with the ammeter manufacturer’s
instructions to take current readings off each of the three conductors (phases) connected to the load side of the azimuth drive motor circuit breaker. Record the current draw in
the equipment log and compare the readings to the reference values entered in the
installation/acceptance check off. If the readings differ by more than five percent, refer to
appropriate troubleshooting information and perform applicable corrective action. Then
take voltage readings off each of the three conductors; the readings should agree with
each other—within two percent. Turn the AZIMUTH switch to OFF.
Step 6
Repeat steps (5) with the AZIMUTH EAST/WEST switch in the alternate operating position.
Step 7
Turn the ELEVATION DOWN/UP switch to either position and while the antenna is rotating, carefully use a clamp on ammeter in accordance with the ammeter manufacturer’s
instructions to take current readings off each of the three conductors (phases) connected to the load side of the elevation drive motor circuit breaker. Record the current draw
in the equipment log and compare the readings to the reference values entered in the
installation/acceptance check off. If the readings differ by more than five percent, refer to
appropriate troubleshooting information and perform applicable corrective action. Then
take voltage readings off each of the three conductors; the readings should agree with
each other within two percent. Turn the ELEVATION switch to OFF.
Step 8
Repeat steps (7) with the ELEVATION DOWN/UP switch in the alternate operating position.
Step 9
If all voltage and current readings are within tolerance, close the local control/motor
drive controller inner door and place the LOCAL/REMOTE switch in the REMOTE position to return antenna control to the studio. Then close and lock the outer local
control/motor drive controller door.
Pedestal Mount
Bearing Pad
Adjustment
The bearing pad (within the pedestal mount) adjustment rods/bolts require yearly adjustment and verification of torque value. With the antenna at zenith (90 degrees), follow
the procedures presented below:
Step 1
Loosen jam nuts on all adjustment rods/bolts.
Step 2
Torque the upper adjustment rod evenly to 40 - 45 foot-pounds. Then torque the lower
adjustment rod evenly to 40 - 45 foot-pounds.
Step 3
Torque the upper adjustment bolt evenly to 40 - 45 foot-pounds. Then torque the lower
adjustment bolt evenly to 40 - 45 foot-pounds.
Step 4
Repeat steps 2 and 3 verifying all adjustment rods/bolts are evenly torqued within the
limits specified.
Step 5
Tighten the jam nuts.
83
Preventive Maintenance
Preservation of
Component Parts
Aluminum Parts
When preserving the component parts, refer to the following paragraphs in this section.
Remove all loose paint and corrosion by scraping, wire brushing, or using steel wool. If
using steel wool near the feed window, make sure that none remains on the feed horn
window. Edges of existing paint can be blended with the metal surface by using a fine
grit sandpaper. Wipe the surface to be painted with a soft rag dampened in trichlorethylene, lacquer thinner or equal. Be certain to remove all loose paint, corrosion, imbedded
dirt, grease, and oil deposits or the paint will not adhere to the surface. Lacquer thinner
will dissolve paint if applied heavily and rubbed vigorously. The reflector may be washed
with plain water if necessary. Do not use bleach, soap solutions, or kerosene as it is difficult to remove the residue. Allow the cleaned surface to dry thoroughly before priming.
Prime the cleaned surface by applying zinc chromate primer. The primer can be applied
with a brush, roller, or pressurized spray. If necessary, thin the primer with lacquer thinner to the proper consistency. Feather primer onto adjacent painted surfaces;. Allow
primer to thoroughly dry before applying the finish paint coat.
Paint all RF surfaces, such as the inside of the main reflector and subreflector with a
high-reflectance white paint. This type of paint disperses light rays, reducing the focusing effect of the sun’s radiation, thereby reducing heat build-up caused by the focused
sun’ rays on the feed system. Rear surfaces of the reflector and subreflector may be
painted with a flat white enamel paint. The paint can be applied with a brush, roller, or
pressurized spray. If necessary, thin the paint with the appropriate thinner to the proper
consistency. Thoroughly paint over the primed surfaces and blend with the existing
painted surface.
Galvanized
Surfaces
Remove all loose paint and corrosion by scraping, wire brushing, or using steel wool.
Edges of existing paint can be blended with the metal surface by using a fine grit sandpaper. Wipe the surface to be painted with a soft rag dampened in trichlorethylene, lacquer thinner, or equal. be certain to remove all loose paint, corrosion, imbedded dirt,
grease, and oil deposits or the paint will not adhere to the surface. Lacquer thinner will
dissolve paint if applied heavily and rubbed vigorously. Do not use bleach, soap solutions, or kerosene as it is difficult to remove the residue. Allow the clean surface to dry
thoroughly before painting.
Paint the cleaned surface with a zing-rich paint. The paint can be applied with a brush,
roller, or pressurized spray. If necessary, thin the paint with the appropriate thinner to
the proper consistency. Thoroughly paint over the cleaned surface and blend with the
existing painted surface.
Lubrication
For long life and trouble-free operation be certain not to extend the lubrication schedule
beyond the frequency recommended in Table 5-1. 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). Any component or part should be
immediately be lubricated if during inspection or operation, rough, jarring, or intermittent
motion is noted, or if squeaky or other unusual noises are heard. Lubrication is required
on all metal-to-metal rolling or sliding parts. Us the lubricants recommended. Do not
over lubricate. Over lubrication can often be as damaging as under lubrication. Prior to
the application of lubricant to any parts, use a clean cloth and/or bristle brush and
84
Preventive Maintenance
remove any old lubricant to prevent an excessive build-up. Remove indicated access
plugs from square tube weldment and apply lubricant to panning frame tube assembly
and corresponding thrust pads. Securely replace access plugs in square tube weldment.
Be certain to remove any protective caps and clean off each lubrication fitting prior to
injecting fresh grease. The elevation and azimuth jackscrew assemblies are equipped
with a grease fitting and corresponding pipe plug on opposite sides of the jack housing.
Remove the appropriate pipe plug and fill with with grease until lubricant seeps from the
pipe plug opening. Replace and securely tighten pipe plug.
The following is a list of the lubricant characteristics:
Jackscrews/Motors
•
Mobil Temp SHC32
A non-soap hydrocarbon fluid type grease. Operating temperature range is -65 degrees to 350+ degrees Fahrenheit (-54
degrees to 177+ degrees Celsius).
•
Mobil SHC624
A low temperature synthetic oil for worm gear reducers.
Operating temperature range is -40 degrees to 125+ degrees
Fahrenheit (-40 degrees to 52+ degrees Celsius).
•
Lightning Grease
A grease lubricant containing molybdenum disulfide. Operating
temperature range is -85 degrees to 300+ degrees Fahrenheit
(-29 degrees to 149+ degrees Celsius).
Periodically inspect lifting screws on jackscrew assemblies to ensure adequate lubrication. Loosen Jackscrew boot clamps to expose the lifting screw assembly. Fully extend
jackscrew assembly being careful not to exceed preset mechanical limits. Brush thin
coating of Mobil SHC32 grease on exposed lifting screw. Replace boot and attach corresponding boot clamps. If lifting screw is rusty, remove existing lubricant with solvent and
wire brush rusted area. Rinse with solvent and apply fresh grease.
Peiordically inspect and remove dust or dirt deposits from the motor housings to avoid
hindering the heat exchange with the ambient air. Slight dirt accumulation on the air
vent screw through splash oil cannot be avoided; however, keep vent screw clean to
ensure proper pressure compensation.
Gear
Motor/Housing Fill
Drain
Requirements
Lube points 2 and 4, shown in Table 5-1, require removal of the indicated drain plugs
and collecting/measuring the amount of SHC624 drain oil using measuring cup. The
specified amount of oil must be added to the gear motor/housing (after installing the
drain plug) via the fill/vent plug opening using supplied funnel. Addition of the oil
requires use of an appropriate filling utensil. Use of a modified level stick will not correctly gauge the appropriate amount of oil in the gear housings.
85
Preventive Maintenance
Lube
Point Parts to be Lubricated
Action
1
Elevation jackscrew housing
2
Elevation gear motor housing Inspect
fill and drain
Change
Frequency
Lubricate Every 3
months
Monthly
Service
Type
Lube
Type
Pressure
Fitting
SHC32
Pipe Plugs SHC624
1
Andrew
Number
49208
10 ounces 47497
Every 3
months
3
Azimuth jackscrew housing
Lubricate Every 3
months
Pressure
Fitting
4
Azimuth jackscrew gear
housing fill and drain
Inspect
Monthly
Pipe Plugs SHC624
Change
Every 3
months
5
Quantity
/Points
Panning frame tube assembly Lubricate Every 3
and thrust pads
months
Brush
On
SHC32
2
49208
10 ounces 47497
Lightning Surface
207912
Lubricant Coverage
Table 5-1: Antenna Lubrication Chart
Inspection requires checking for visible signs of oil leakage, draining, replacing, and
adding oil to ensure appropriate oil level requirements. Excessively dirty oil will require
fresh oil replacement. If oil leakage is found to be excessive, refer to appropriate troubleshooting information and perform applicable corrective action. Periodic inspection
procedures can be less frequent after first or second scheduled inspections.
Initial oil change requirements include flushing gear boxes with a standard cleaning
agent.
86
Preventive Maintenance
Download PDF

advertising