Instruction/ maintenance manual of the product 7.6-Meter ESA Andrew
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Andrew Cor poration 10500 West 153rd Street Orland Park, IL U.S.A. 60462 T elephone: 708-349-3300 F AX (U.S.A.): 1-800-349-5444 Internet: http://www.andrew .
Introduction How to Use T his Manual Getting Star ted Installation Procedures Operation Prev entive Maintenance T able of Contents 2 T a ble of Contents Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction Like all Andrew earth station antennas, the 7.6-Meter Earth S tation Antenna provides high gain and exceptional pattern characteristics. The electrical performance and excep- tional versatility provides the ability to configure the antenna with your choice of linearly- or circularly-polarized 2-port or 4-port combining network.
Proprietar y Data Infor mation and Assistance Notice T echnical Assistance The technical data contained herein is proprietary to Andrew Corporation. It is intended for use in operation and maintenance of Andrew supplied equipment.
Ov er view Content The scope of this manual is intended to provide station personnel with the base inst alla- tion, operation, and maintenance requirements necessary for a 7.
Ov er view Warnings The inst allation, operation, and maintenance of the 7.6-Meter Earth S tation Antenna requires qualified and experienced personnel. Andrew inst allation, operation, and main- tenance instructions are illustrated for such personnel.
R ecommended T ools 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.
Par ts V erification R epor ting Equipment Loss or Damage R epor ting Visible Loss or Damage R epor ting Concealed Damage Inv entor y Equipment R eceiv ed Upon receipt of your order , the shipment should be verified to ensure that all parts have reached your site.
R etur ning Equipment Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 Andrew Corporation tries to ensure that all items arrive safe and in working order . Occasionally , despite these effort s, equipment is received which is not in working condi- tion.
Ov er view Founda tion Pre paration 10 Installation Procedures This section provides installation procedures for the 7.6-Meter Andrew Earth S tation Antenna.
A-325 T ensioning Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 Ste p 6 11 During the installation process, there are several references to the A-325 hardware ten- sioning procedure. The A-325 hardware must be properly tensioned to avoid slippage between bolted surfaces under high loads.
T ripod Gr ound Mount Assembly Azimuth Beam Assembly Ste p 1 Ste p 2 Ste p 3 12 The three-point mount is an elevation-over-azimuth mount optimized for geostationary satellite applications. The mount enables continuous elevation adjustment from 0 to 90°.
Suppor t Le gs Assembly Ste p 1 Ste p 2 13 Attach 201327A joint assembly to 201313A beam assembly as shown in Figure 5. Attach 200083 angles to 201313A beam assembly as shown in Figure 5.
Ste p 3 Ste p 4 14 Raise 201313A beam assembly to upright position and attach 201315 supports to 201327A joint assembly as shown in Figure 7. • Use 7/8 x 2-1/4 in. (57 mm) bolts and nuts. • Insert bolt s from 201327A joint assembly to supports. • Supports should be installed back-to-back with the flat of angle facing upwards.
Ste p 5 Ste p 6 15 Attach 201314 supports to 201301/201302 rear pad assemblies and 200884 joint assembly as shown in Figure 9. • Use 7/8 x 2-1/4 in. (57 mm) bolts and nuts • Insert bolt from insid.
Panning Frame Assembly Ste p 1 16 Attach 201487 panning frame to 221384 azimuth pivot assembly as shown in Figures 1 1 and 12. • Use 7/8 x 2-1/4 in. (57 mm) hardware • Bolts should connect from pa.
Ste p 2 17 Attach 221608 joint assemblies to panning frame as shown in Figures 13 and 14. • Use 7/8 x 2-1/4 in (57 mm) hardware • Insert bolt s from panning frame to joint assembly Installation Pr.
Ste p 3 Ste p 4 18 Attach 201316 support pairs to 221608 joint assemblies as shown in Figure 15. • Place support s back-to-back with edges out and flat of angle inward • Install 45967 spacer at mi.
Ste p 5 Ste p 6 19 Attach 201770 plate connecting 201484/201484-2 extension assembly to 201487 pan- ning frame as pictured in Figure 17. • Use 7/8 x 2-1/4 in (57 mm) hardware • Insert bolt s from inside panning frame assembly Installation Procedures Figure 17 Attach 201488 outrigger plate to opposite end of 201487 panning assembly .
Ste p 7 Ste p 8 20 Attach second 201488 outrigger plate to 201487 panning frame assembly as shown in Figure 19. • Use 7/8 x 2-1/4 in (57 mm) hardware • Insert bolt s from inside assembly to outrig.
Ste p 9 21 Installation Procedures Figure 21 Attach 301741/301742 tripod joint bracket to 221721 elevation axis assembly as shown in Figure 22. • Use 7/8 x 2-1/4 in (57 mm) bolt, flatwasher under bo.
Ste p 10 Ste p 11 22 Installation Procedures Attach 300026 tripod channel legs to 301741/301742 tripod joint bracket as shown in Figure 23. • Use 7/8 x 2-1/4 in (57 mm) bolt, flatwasher and nut • .
Ele v ation J ackscrew Assembly Ste p 1 Ste p 2 23 Installation Procedures Attach 301771/301736 elevation jackscrew assembly to 201596 mounting plates as shown in Figure 25. Tighten connection. • Use 7/8 x 2-1/2 bolts and nuts Figure 25 Loosen rubber boot from end of jackscrew .
Ste p 3 Ste p 4 24 Installation Procedures Figure 27 Attach 301771/301736 elevation jackscrew to 301725 tripod tube weldment as shown in Figure 28. • Use 7/8 x 5-1/4 (133 mm) bolt. Fasten with heavy hex nut and flatwasher according to A-325 procedure with the exception of tightening the nut 1/2 turn from snug condition.
Azimuth J ackscrew Assembly Ste p 1 Ste p 2 Mount Assembly Ste p 1 Ste p 2 25 Installation Procedures Insert 221923/223180 azimuth jackscrew tube into 221738 azimuth pivot assembly as shown in Figure 29. Insert jack carefully to prevent scratching jackscrew tube.
Ste p 3 Ste p 4 26 Installation Procedures Attach rear pad assemblies to rear foundation pads as pictured in Figure 31. Figure 31 Connect beam assembly using 7/8 x 2-1/4 in (57 mm) hardware. Tighten supports to beam assembly per A-325 tensioning procedure.
Ste p 5 Ste p 6 27 Installation Procedures Hoist elevation jackscrew assembly to mount. Attach 221384 azimuth pivot assembly to 221608 joint assembly with 7/8 x 2-1/4 hardware from pivot assembly to joint assembly as shown in Figure 32.
Ste p 7 Ste p 8 Ste p 9 28 Installation Procedures Figure 34 Refer to Figure 34. Position hoisting ropes on motor/jack assembly so jack will not roll when hoisted. Attach one rope to large motor frame next to gearbox to balance assem- bly; do not attach rope to small motor .
Ste p 10 Ste p 11 29 Installation Procedures Extend jackscrew to meet outrigger assembly . Loosely re-attach outrigger plate to pin assembly in azimuth jackscrew as shown in Figure 35. Note: Realignment of panning frame/pivot assembly may be necessary to ensure proper alignment of azimuth jackscrew pin.
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Ov er view Acquiring A Satellite 54 Operation 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 .
Ste p 1 Ste p 2 Ste p 3 Ste p 4 55 The following steps provide the procedure for acquiring a satellite. Manually move the antenna in the azimuth (scanning back-and-forth) to achieve the maximum (greatest amplitude) transponder signals.
Ste p 5 Ste p 6 Ste p 7 Ste p 8 56 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.
Ste p 9 57 With all 24 transponder signals of approximately equal amplitude appearing on the spectrum analyzer screen determine the specific antenna system and satellite parame- ters. Rot ate the feed assembly as required until the appropriate (odd or even) transpon- der signals are maximized.
Subreflector Adjustment 58 Operation 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 anten- na. The following procedures should be followed if a subreflector adjustment is required to maximize optimum performance.
Ov er view General Cleaning Electrical Par ts 59 Prev entiv e Maintenance This section contains periodic preventive maintenance instructions for the 5.
Mechanical P ar ts Inspection Local Control/Motor Driv e Controller 60 scraper , stiff brush (bristle or wire in the case of rust or other corrosion), or cloth or com- pressed air at 25 to 40 psi.
Antenna 61 pungent odor indicative of burning vanish denoting overheating or a total breakdown. • Check all terminal boards for broken or missing terminals and stripped threads.
62 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.
Driv e System V olta g e and Cur rent Checks Ste p 1 Ste p 2 Ste p 3 63 tain all electrical grounding connections (including cross-axis grounding straps) are intact and secure, not corroded or broken.
Ste p 4 Ste p 5 Ste p 6 Ste p 7 Ste p 8 Ste p 9 64 T urn the AZIMUTH EAST/WEST switch to either position and while the antenna is rotat- ing, carefully use a clamp on ammeter in accordance with the am.
Preser v ation of Component Par ts Aluminum Par ts Galv anized Surfaces Lubrication 65 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 .
J ackscrews/Motors Gear Motor/Housing Fill Drain R equirements 66 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.
67 Prev entiv e Maintenance Lube Components Frequency T ype T ype No. of Lube Point to be (Months) of of Points or No. Lubricated 1361 2 Service Lube Quantity 1. Elevation Jackscrew Housing X Pressure Fitting SHC32 1 2. 1 Elevation Jackscrew Gear Housing I* C** Pipe Plugs SHC624 10 Oz Fill and Drain 3.
High-Speed Antenna Lubrication Points 5 9 10 6 7 8 4 1 2 3 Local Motor Control Heater Control Pressure Fitting Pressure Fitting Gearbox Fill Gearbox V ent Gearbox Level Gearbox Fill Gearbox V ent Gearbox Level Polarization Drive Gear Worm Gear Pillow Blocks (2) Note Medium-speed motors shown for illustrative purposes only .
Medium-Speed Antenna Lubrication Points 5 9 10 6 7 8 4 1 2 3 Local Motor Control Heater Control Pressure Fitting Pressure Fitting Gearbox Level Gearbox Drain Gearbox Level Gearbox Drain Polarization D.
An important point after buying a device Andrew 7.6-Meter ESA (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Andrew 7.6-Meter ESA yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Andrew 7.6-Meter ESA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Andrew 7.6-Meter ESA you will learn all the available features of the product, as well as information on its operation. The information that you get Andrew 7.6-Meter ESA will certainly help you make a decision on the purchase.
If you already are a holder of Andrew 7.6-Meter ESA, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Andrew 7.6-Meter ESA.
However, one of the most important roles played by the user manual is to help in solving problems with Andrew 7.6-Meter ESA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Andrew 7.6-Meter ESA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
