Andrew 3.7-Meter Earth Station Antenna manuel d'utilisation

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Le mot vient du latin "Instructio", à savoir organiser. Ainsi, le manuel d’utilisation Andrew 3.7-Meter Earth Station Antenna décrit les étapes de la procédure. Le but du manuel d’utilisation est d’instruire, de faciliter le démarrage, l'utilisation de l'équipement ou l'exécution des actions spécifiques. Le manuel d’utilisation est une collection d'informations sur l'objet/service, une indice.

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Tout d'abord, le manuel d’utilisation Andrew 3.7-Meter Earth Station Antenna devrait contenir:
- informations sur les caractéristiques techniques du dispositif Andrew 3.7-Meter Earth Station Antenna
- nom du fabricant et année de fabrication Andrew 3.7-Meter Earth Station Antenna
- instructions d'utilisation, de réglage et d’entretien de l'équipement Andrew 3.7-Meter Earth Station Antenna
- signes de sécurité et attestations confirmant la conformité avec les normes pertinentes

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Habituellement, cela est dû au manque de temps et de certitude quant à la fonctionnalité spécifique de l'équipement acheté. Malheureusement, la connexion et le démarrage Andrew 3.7-Meter Earth Station Antenna ne suffisent pas. Le manuel d’utilisation contient un certain nombre de lignes directrices concernant les fonctionnalités spécifiques, la sécurité, les méthodes d'entretien (même les moyens qui doivent être utilisés), les défauts possibles Andrew 3.7-Meter Earth Station Antenna et les moyens de résoudre des problèmes communs lors de l'utilisation. Enfin, le manuel contient les coordonnées du service Andrew en l'absence de l'efficacité des solutions proposées. Actuellement, les manuels d’utilisation sous la forme d'animations intéressantes et de vidéos pédagogiques qui sont meilleurs que la brochure, sont très populaires. Ce type de manuel permet à l'utilisateur de voir toute la vidéo d'instruction sans sauter les spécifications et les descriptions techniques compliquées Andrew 3.7-Meter Earth Station Antenna, comme c’est le cas pour la version papier.

Pourquoi lire le manuel d’utilisation?

Tout d'abord, il contient la réponse sur la structure, les possibilités du dispositif Andrew 3.7-Meter Earth Station Antenna, l'utilisation de divers accessoires et une gamme d'informations pour profiter pleinement de toutes les fonctionnalités et commodités.

Après un achat réussi de l’équipement/dispositif, prenez un moment pour vous familiariser avec toutes les parties du manuel d'utilisation Andrew 3.7-Meter Earth Station Antenna. À l'heure actuelle, ils sont soigneusement préparés et traduits pour qu'ils soient non seulement compréhensibles pour les utilisateurs, mais pour qu’ils remplissent leur fonction de base de l'information et d’aide.

Table des matières du manuel d’utilisation

  • Page 1

    Andrew Cor poration 10500 West 153rd S treet 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 .com Customer Service, 24 hours: U.S.A. • Canada • Mexico: 1-800-255-1479 U.K.: 0800 250055 • Republic of Ireland: 1 800 535358 Other Europe: +44 1592 782612 Printed in U.S.A. 9/00 Copyr[...]

  • Page 2

    Introduction How to Use This Manual Getting Star ted Installation Procedures Operation Prev entive Maintenance T able of Contents 2 T a ble of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Proprietary Data . . . . . . . . . [...]

  • Page 3

    Introduction Like all Andrew earth station antennas, the 3.7-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- polarized 2-port or 4-port combining network. That versatility is p[...]

  • Page 4

    Proprietar y Data Infor mation and Assistance Notice T echnical Assistance The technical data cont ained 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 Corporati[...]

  • Page 5

    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 3.7-Meter C- or Ku-Band Earth S tation Antenna. This manual provides a convenient reference for authorized operator/service personnel requiring technical information on general s[...]

  • Page 6

    Ov er view Warnings The installation, operation, and maintenance of the 3.7-Meter Earth S tation Antenna requires qualified and experienced personnel. Andrew installation, operation, and main- tenance instructions are illustrated for such personnel. Additionally , the antenna should be inspected by qualified personnel to verify proper installation,[...]

  • Page 7

    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. Andrew disclaims any liability or responsibility for the r[...]

  • Page 8

    Par ts V erification R e por ting Equipment Loss or Damage R e por ting Visible Loss or Damage R e por 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. This process should occur before the inst allation process begins. Andrew Corporat[...]

  • Page 9

    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. When this occurs, and it is necessary to return the equipment to Andrew Corporation for either repair or [...]

  • Page 10

    Installation Sequence Checklist Site Pre paration Ground Mount Assembly For MPK T ypes Only The 3.7-Meter Earth S tation 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 [...]

  • Page 11

    For MPJK T ypes Only Main R eflector Assembly  Mount azimuth pivot assembly to ground mount assembly  Bolt one jack to azimuth pivot assembly  Unscrew jack  T ighten galvanized hardware using A-325 tensioning procedure  Lubricate jackscrews  Pull protective boot over jackscrew  Bolt elevation pivot assembly brackets to ground m[...]

  • Page 12

    Enclosure Assembly R eflector-T o- Mount Assembly  Add reflector-mounting ring  Mount front and back hub-mounting rings  Apply sealant to outside of reflector-mounting ring  Perform recommended string test  Remove rear and side covers from enclosure assembly  Attach enclosure to mounting ring  Apply sealant backing rod around e[...]

  • Page 13

    Subreflector Feed System  Preassemble subreflector weldment  Attach subreflector-mounting ring to strut assembly  Attach angle clip s  Attach subreflector to reflector  Adjust subreflector  T ighten adjustment hardware  Refer to installation instructions p ackaged with the individual feed systems 13 Getting Star ted[...]

  • Page 14

    Ov er view Founda tion Pre paration 14 Installation Procedures This section provides installation procedures for the 3.7-Meter Andrew Earth S tation Antenna. The inst allation procedures include instructions on the following antenna com- ponents: • Mount • Reflector • Enclosure • Reflector-to-Mount Assembly • Subreflector • Feed System [...]

  • Page 15

    A-325 T ensioning Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 Ste p 6 15 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. Slippage can cause the corresponding assembly to move, causing ante[...]

  • Page 16

    Mount Unpacking Assembly (Using a Crane) 16 The elevation/azimuth mount design simplifies installation, minimizes foundation require- ments, 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, d[...]

  • Page 17

    Ste p 1 Ste p 2 Ste p 3 Ste p 4 17 Carefully remove the ground mount assembly (P/N 208800 - motorizable or P/N 202680-2 manual) from the packing crate. Leave the steel strapping int act to avoid dis- engagement of the panning frame from the square-tube weldment during the ground mount installation. Securely attach the crane to the ground mount asse[...]

  • Page 18

    Ste p 5 Ste p 6 Ste p 7 18 Attach the ground mount assembly to the eight corresponding anchor bolt s 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. Installation Procedures Figure 3-4a: Ground Mount A[...]

  • Page 19

    Assembly (Without a Cr ane) Ste p 1 Ste p 2 19 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 inst alling the ground mount assembly without a crane. Carefully remove [...]

  • Page 20

    Ste p 3 20 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. Installation Procedures Figure 3-6a: Manual Lift Figure 3-6b: Manual Lift[...]

  • Page 21

    Ste p 4 Ste p 5 Ste p 6 21 Figure 3-7: Mount Alignment/Adjustment NOTE: Y ou 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. Attach the ground mount assembly to the eight corresponding anchor bolt s using a 3/4 inch flat washer[...]

  • Page 22

    Motorizable P edestal Ground Mount Assembly Ste p 1 Ste p 2 Ste p 3 Ste p 4 22 Installation Procedures 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°. Position and mount [...]

  • Page 23

    23 Installation Procedures 1/2” Flat W asher 1/2 x 1-3/4” Bolt and Nut Universal T erminal 5/16 x 3/4” Hex Head Screw and Lock W asher Grounding Cable Figure 3-8d: Ground Mount Assembly T iller Arm Hardware Figure 3-8e: Ground Mount Assembly T iller Arm Hardware Left Position -90° T o +30° Right Position -30° T o +90° Center Position -60?[...]

  • Page 24

    Manual P edestal Ground Mount Assembly Ste p 1 Ste p 2 24 Prepare the ground mount hardware in the mount hardware kit by sorting all bolt s, nuts, and flat washers into separate sections as shown in Figure 3-9. Installation Procedures Figure 3-9: Hardware Separation W ax two sides of each galvanized bolt with the stick wax provided. This allows a s[...]

  • Page 25

    Ste p 3 Ste p 4 25 Position and mount the azimuth tiller arm (P/N 2031 12) 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 3-1 1. NOTE: The ground mount assembly enables 180[...]

  • Page 26

    Ste p 5 26 Figure 3-12: Azimuth T iller Arm - Final Assembly 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. Installation Procedures Figure 3-13: Elevation and Azimuth S truts An illustration of the final azimuth tiller a[...]

  • Page 27

    Ste p 6 Ste p 7 Ste p 8 27 Installation Procedures 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. T ighten hardware according to the A-325 tensioning procedure. Figure [...]

  • Page 28

    Ste p 9 28 Installation Procedures Figure 3-16: Azimuth Pivot Assembly 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 bracket s should be aligned as shown in Figure 3-18. Figure 3-17a: Azimuth S trut Assembly - Front[...]

  • Page 29

    29 Installation Procedures Figure 3-17b: Azimuth S trut Assembly - Rear Figure 3-18 illustrates a final azimuth strut assembly mounted to the ground mount assembly . Figure 3-18: Azimuth S trut Assembly - Final Assembly[...]

  • Page 30

    Ste p 10 Ste p 11 30 Installation Procedures Figure 3-19: Elevation S trut Pick Up Assembly (T op View) Bolt the elevation bracket-support plates (P/N 205873) to the elevation strut tube assem- bly using 5/8 inch hardware (hex bolt, flatwasher and nut)as shown in Figure 3-20. Figure 3-20: Bracket-Support Plates (T op View) The next step is to insta[...]

  • Page 31

    Ste p 12 31 Installation Procedures 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 S trut Bracket Figure 3-21b: Elevation S trut Bracket[...]

  • Page 32

    Manual Actua tor Assembly Ste p 1 Ste p 2 Ste p 3 32 Installation Procedures The manual actuator assembly (P/N 207882) is used to adjust the elevation and azimuth angles of the 3.7 meter antenna. The following step s provide the procedure used to assemble and install the manual actuator assembly . Loosely attach the manual actuator assembly (P/N 20[...]

  • Page 33

    Ste p 4 Ste p 5 Ste p 6 Ste p 7 Manual Actua tor Assembly R emo val Ste p 1 Ste p 2 Ste p 3 Motorizable P edestal Ground Mount Assembly Ste p 1 33 Installation Procedures Remove the two indicated strut-support setscrews, and att ach the base angle to the cor- responding strut support using the supplied 1/2 inch clamping nuts and the previously remo[...]

  • Page 34

    Ste p 2 Ste p 3 34 Installation Procedures Bolt one jack to the azimuth pivot assembly using 5/8 inch hardware (hex bolt, flatwash- er and hex nut) as shown in Figure 3-24. Figure 3-24: Jack Attachment Unscrew the jack using a spud wrench until it meets with the front azimuth strut weld- ment as shown in Figure 3-25a. Figure 3-25a: Jack Unscrew Pro[...]

  • Page 35

    Ste p 4 Ste p 5 Ste p 6 Ste p 7 35 Installation Procedures Figure 3-25b: Azimuth Jack Attachment T ighten the hardware using the A-325 tensioning procedure. Lubricate the jackscrews according to the maintenance instructions. Pull the protective boot over the jackscrew , and clamp at the end as shown in Figure 3-26. Note: Position condensation drain[...]

  • Page 36

    Ste p 8 Ste p 9 36 Installation Procedures Bolt the elevation pivot assembly brackets (P/N 208370 - lef t 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 Bolt the jack to the elevation pivot assembly using 5/8 inch hardware (hex bolts, flat- washers and nuts) [...]

  • Page 37

    Ste p 10 Ste p 11 Ste p 12 Ste p 13 Ste p 14 37 Installation Procedures Figure 3-28b: Elevation Jack Loosen the clamp on the jack boot. 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 T ighten the hardware using the A-325 tensioning procedu[...]

  • Page 38

    Embedded Pipe Ground Mount Assembly Ste p 1 38 Installation Procedures Refer to Figure 3-29a for an overall view of the assembled embedded pipe ground mount assembly , reflector and subreflector assemblies. Figure 3-29a: T ypical Embedded Pipe Mount Earth S tation Antenna Attach the 104320 lef t side frame, to the 168 tube using four 104326 U-bolts[...]

  • Page 39

    Ste p 2 Ele v ation/Azimuth Strut Assembl y Ste p 3 39 Installation Procedures Attach the 104319 front frame to the lef t side frame as shown in Figure 3-29c. Attach the 104325 braces to the left side by means of the U-bolt s. Attach the right side frame and braces to the front frame and the right side frame to the left side frame, also shown. For [...]

  • Page 40

    Ste p 4 40 Installation Procedures 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 . T ighten bolts to 185 N•m. (136 lbs-f t). Figure 3-29e: Elevation S trut Attachment Attach 301917 elevation axis weldment to the front of the frame[...]

  • Page 41

    Ste p 5 Ste p 6 41 Installation Procedures Attach the azimuth strut to the bottom rear of the frame assembly as shown in Figure 3- 29g, 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. Install 301931 pointer where shown in Fig[...]

  • Page 42

    Ste p 7 42 Installation Procedures Install fine az. adjustment, att ach 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 tem- porarily remove one square head bolt for fine adjus[...]

  • Page 43

    R eflector Unpacking Ste p 1 Ste p 2 43 Installation Procedures The ground mount assembly is now completed with the necessary operational essen- tials. All ground mount options (such as motors) have separate instructional bulletins located in the part s kit that contains the option. The next step in the installation process is the reflector assembl[...]

  • Page 44

    Ste p 3 Ste p 4 Ste p 5 Ste p 6 44 Installation Procedures Figure 3-30b: Export Pack Figure 3-30c: Unpacking 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 part s of your order are boxed and banded to your crate. Remove these boxes by snipping the banding with tin snips. T ake the f[...]

  • Page 45

    Ste p 7 Ste p 8 Ste p 9 Ste p 10 Assembly Ste p 1 Ste p 2 45 Installation Procedures Lay the first half of the reflector (which has the flash located at twelve o’clock) face down on the blocks of wood. Lay the second half of the reflector face down on the blocks of wood. Unbolt the mounting ring from the crate, and set with the rest of the part s[...]

  • Page 46

    Ste p 3 Ste p 4 46 Installation Procedures Insert all of the joint-plate bolts, except for the socket-head shoulder bolt s. 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 bolt s—manipulate reflector halves to allow free insertion. At bot[...]

  • Page 47

    Ste p 5 47 Installation Procedures Figure 3-33a: Alignment Bolt Insertions Figure 3-33b: Alignment Bolt Insertions Add the alignment hex bolts to the end holes of the joint plates as shown in Figure 3- 33a (outside and inside of plate) to ensure that it is evenly aligned; and use hex bolt s to fill the rest of the joint plates as shown in Figure 3-[...]

  • Page 48

    Ste p 6 48 Installation Procedures Figure 3-33d: Alignment Bolt Insertions T ighten 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 in[...]

  • Page 49

    Ste p 7 49 Installation Procedures 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 [...]

  • Page 50

    Ste p 8 Ste p 9 50 Installation Procedures 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 p art of P/N 206319 Feed Hardware Kit. For K-Band Antennas, these components are included as part of P/N 301544 Feed Har[...]

  • Page 51

    Alignment T est Ste p 1 Ste p 2 Ste p 3 Ste p 4 51 Installation Procedures 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 cor- rectly d[...]

  • Page 52

    Enclosure (P edestal Mount Only) Ste p 1 52 Installation Procedures The enclosure (P/N 202934A) assembly attaches to the rear of the reflector . The enclo- sure provides weather protection for RF equipment and can accommodate up to a 4- port combiner network. An example of the assembled enclosure is presented in Figure 3-38a and Figure 3-38b. Figur[...]

  • Page 53

    Ste p 2 53 Installation Procedures 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. Figure 3-39a: Enclosure Hardware Figure 3-39b: Enclosure Hardware VER Y IMPORT ANT[...]

  • Page 54

    Ste p 3 Ste p 4 Ste p 5 54 Installation Procedures 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 Securely tighten the enclosure mounting hardware using the A-325 tensioning proce- dure. Apply the supplied RTV sea[...]

  • Page 55

    R eflector-to-Mount Assembly Using a Crane Ste p 1 Ste p 2 55 Installation Procedures 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 inst alling the reflector to the mount using a crane. Route a sling [...]

  • Page 56

    Ste p 3 Ste p 4 Ste p 5 56 Installation Procedures V erify that all hoist assembly hardware is fully in tact before lifting the reflector to avoid personal injury or damage to the reflector . Route the crane’s cable and hook from the hoist over the slings, and att ach the shack- le’s hook to the crane’ s hook for raising the reflector . Posit[...]

  • Page 57

    Without a Cr ane Ste p 1 Ste p 2 57 Installation Procedures Figure 3-44c: Crane Lift The following steps provide the procedure for inst alling the reflector to the mount with- out the use of a crane. Route one rope tag line through two consecutive holes at the top of the reflector in the torsion box assembly . Place foam blocks (provided as packagi[...]

  • Page 58

    Ste p 3 Ste p 4 58 Installation Procedures Figure 3-45: Manual Lift of the Reflector to the Mount 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 Position three people at the top of the reflector to lift the reflector on it s end, facing for- ward as shown in[...]

  • Page 59

    Ste p 5 Ste p 6 59 Installation Procedures Align the enclosure bracket to the ground mount assembly . The lef t 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 Have the two people on the ground rotate the reflector t[...]

  • Page 60

    Ste p 7 Ste p 8 Ste p 9 Ste p 10 60 Installation Procedures Figure 3-49: Elevation Jack/Enclosure Attachment T ighten the hardware using the A-325 tensioning procedure. Carefully raise the reflector/enclosure assembly to the zenith (elevation = 90 degrees) position, and securely tighten the strut-support setscrews to 40 foot-pounds. Remove all hois[...]

  • Page 61

    61 Installation Procedures Figure 3-50a: Reflector to Mount The Reflector-to-Mount components can be verified and/or clarified in the following diagram.[...]

  • Page 62

    Y ou 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 R eflector-to-Mount Assembly Embedded Pipe Ground Mount Ste p 1 Lift the reflector carefully onto the mount as shown in Figure 3-50b. Secure the[...]

  • Page 63

    Subreflector Ste p 1 63 Installation Procedures 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 . Loosely preassemble the subreflector strut weldme[...]

  • Page 64

    Ste p 2 64 Installation Procedures Position and attach the subreflector-mounting ring (p art of 205929 subreflector assem- bly) to the corresponding mounting holes in the strut-support plates using 3/8 inch by 1 inch bolts, oversized flat washers, lock washers, and nut s as shown in Figure 3-53a and Figure 3-53b. NOTE: Ensure that one subreflector [...]

  • Page 65

    Ste p 3 65 Installation Procedures Figure 3-53b: Subreflector Assembly Attach the angle clip s (P/N 49187) around the reflector perimeter at the indicated posi- tions using the appropriate hardware as noted in Figure 3-53c. Figure 3-53c: Subreflector Assembly[...]

  • Page 66

    Raise and attach the preassembled subreflector strut assemblies between the corre- sponding angle clips using a t ag 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. Ste p 4 66 Installation Procedures Figure[...]

  • Page 67

    67 Installation Procedures Subreflector Struts Embedded Pipe Ground Mount Assembly Ste p 1 Ste p 2 Ste p 3 Ste p 4 Loosely preassemble the 300056 Subreflector S truts using supplied 222888 strut sup- ports and the 9963-127 3/8 inch by 2 1/4 inch bolt s, 9974-63 lockwashers, and 9999-60 nuts as shown in Figure 3-54b, V iew A. Note: At this time it i[...]

  • Page 68

    Subreflector Adjustment Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 68 Installation Procedures After the subreflector assembly has been att ached to the reflector , the subreflector must be adjusted to ensure correct alignment. The following step s provide the procedure for adjusting the subreflector . Position the supplied setting bar (P/N 203896 Ku-b[...]

  • Page 69

    Ste p 6 Ste p 7 Ste p 8 69 Installation Procedures 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. T emporarily tighten the adjustment hardware until after step 10 has been completed. Figure 3-56: Subreflector Alignment Measure and n[...]

  • Page 70

    Ste p 9 Ste p 10 Ste p 11 Feed System 70 Installation Procedures Obtain the corresponding measurement s from the remaining subreflector struts, and adjust the subreflector mounting hardware (4 places) to achieve a maximum differential of 1/16 inch. Repeat the adjustment procedure performed in S teps 1-4, until all areas of the subre- flector are un[...]

  • Page 71

    Ov er view Acquiring A Satellite Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 Ste p 6 Ste p 7 71 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 appro[...]

  • Page 72

    72 Figure 4-1: Pure Noise Signal on S pectrum Analyzer Figure 4-2: Minimum transponder Signal on S pectrum Analyzer Operation[...]

  • Page 73

    Ste p 1 Ste p 2 Ste p 3 Ste p 4 73 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. • Scan in one direction until the amplitude continues to diminish and then scan in the opposite direction until [...]

  • Page 74

    Ste p 5 Ste p 6 Ste p 7 Ste p 8 74 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 dim[...]

  • Page 75

    Ste p 9 75 With all 24 transponder signals of approximately equal amplitude appearing on the spectrum analyzer screen determine the specific antenna system and satellite parame- ters. Rotate the feed assembly as required until the appropriate (odd or even) transpon- der signals are maximized. Figure 4-5: Maximizing Odd T ransponders Figure 4-6: Opt[...]

  • Page 76

    Manual Actua tor Assembly R emo val Ste p 1 Ste p 2 Ste p 3 Embedded Pipe Ground Mount Ele v ation Adjustment Ste p 1 Ste p 2 Azimuth Adjustment Ste p 1 Conclusion 76 After you have successfully acquired the satellite and all adjustment s have been made, the manual actuator should be removed. The following step s provide the procedure for the prop-[...]

  • Page 77

    Subreflector Adjustment 77 Operation After the satellite has been acquired and testing has t aken 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. NOTE: A[...]

  • Page 78

    Ov er view General Cleaning Electrical Par ts 78 Prev entiv e Maintenance This section contains periodic preventive maintenance instructions for the 3.7-Meter Earth S tation Antenna. Included in this section are inspection and preventive mainte- nance procedures including cleaning and lubrication, painting, and an operational volt- age/current chec[...]

  • Page 79

    Mechanical P ar ts Inspection Local Control/Motor Driv e Controller 79 Clean mechanical part s 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 com- pressed air at 25 to 40 psi. Any accumulated imbedded dirt, corrosion, grease, or oil deposi[...]

  • Page 80

    Antenna 80 • 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-af te[...]

  • Page 81

    81 • 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 structur[...]

  • Page 82

    Driv e System V olta g e and Cur rent Checks Ste p 1 Ste p 2 Ste p 3 82 • Check security of antenna mounting and interconnecting assembly hardware. Be cer- tain all electrical grounding connections (including cross-axis grounding strap s) are intact and secure, not corroded or broken. Thoroughly clean any noticeable corroded portions of grounding[...]

  • Page 83

    Ste p 4 Ste p 5 Ste p 6 Ste p 7 Ste p 8 Ste p 9 P edestal Mount Bearing Pad Adjustment Ste p 1 Ste p 2 Ste p 3 Ste p 4 Ste p 5 83 Repeat preceding step (3) with the FEED CCW/OFF/CW switch in the alternate operat- ing position. T urn the AZIMUTH EAST/WEST switch to either position and while the antenna is rotat- ing, carefully use a clamp on ammeter[...]

  • Page 84

    Preser v ation of Component Par ts Aluminum P ar ts Galv anized Surfaces Lubrication 84 When preserving the component part s, 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[...]

  • Page 85

    J ackscrews/Motors Gear Motor/Housing Fill Drain R equirements 85 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 protect[...]

  • Page 86

    86 Lube Service Lube Quantity Andrew Point Parts to be Lubricated Action Frequency T ype T ype /Points Number 1 Elevation jackscrew housing Lubricate Every 3 Pressure SHC32 1 49208 months Fitting 2 Elevation gear motor housing Inspect Monthly Pipe Plugs SHC624 10 ounces 47497 fill and drain Change Every 3 months 3 Azimuth jackscrew housing Lubricat[...]