Andrew 3.7-Meter Earth Station Antenna manual Step Pedestal Mount Bearing Pad Adjustment

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Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Pedestal Mount

Bearing Pad

Adjustment

Step 1

Step 2

Step 3

Step 4

Step 5

Repeat preceding step (3) with the FEED CCW/OFF/CW switch in the alternate operat- ing position.

Turn 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 ammeter manufacturer’s instructions to take current readings off each of the three conductors (phases) connect- ed 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.

Repeat steps (5) with the AZIMUTH EAST/WEST switch in the alternate operating posi- tion.

Turn the ELEVATION DOWN/UP switch to either position and while the antenna is rotat- ing, 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) connect- ed 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.

Repeat steps (7) with the ELEVATION DOWN/UP switch in the alternate operating posi- tion.

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 posi- tion to return antenna control to the studio. Then close and lock the outer local control/motor drive controller door.

The bearing pad (within the pedestal mount) adjustment rods/bolts require yearly adjust- ment and verification of torque value. With the antenna at zenith (90 degrees), follow the procedures presented below:

Loosen jam nuts on all adjustment rods/bolts.

Torque the upper adjustment rod evenly to 40 - 45 foot-pounds. Then torque the lower adjustment rod evenly to 40 - 45 foot-pounds.

Torque the upper adjustment bolt evenly to 40 - 45 foot-pounds. Then torque the lower adjustment bolt evenly to 40 - 45 foot-pounds.

Repeat steps 2 and 3 verifying all adjustment rods/bolts are evenly torqued within the limits specified.

Tighten the jam nuts.

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Preventive Maintenance

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Contents Meter ESA Table of Contents Introduction Meter Earth Station AntennaProprietary Data Information and Assistance Technical Customer Service CenterHow to Use This Manual Overview ContentGetting Started OverviewRecommended Tools Getting Started Returning Equipment Step Getting Started For Mpjk Types Only Main Reflector Assembly Enclosure Assembly Reflector-To- Mount Assembly Subreflector Feed System Overview Foundation Preparation Installation Procedures1b A-325 Tensioning For bolts over four diameters Tensioning StepMount Unpacking Assembly Using a Crane Step 4b Ground Mount Assembly Base Hardware Ground Mount Assembly Alignment with Anchor Bolts Assembly Without a Crane Step6a Manual Lift 8a Ground Mount Assembly Base Hardware 8b Ground Mount Assembly Tiller Arm Hardware Motorizable Pedestal Ground Mount Assembly Step8d Ground Mount Assembly Tiller Arm Hardware 10 Waxing Bolts Manual Pedestal Ground Mount Assembly StepStep 13 Elevation and Azimuth Struts Step 17a Azimuth Strut Assembly Front 17b Azimuth Strut Assembly Rear 20 Bracket-Support Plates Top View 21a Elevation Strut Bracket 22a Manual Actuator Assembly Manual Actuator Assembly Step23 Azimuth Pivot Bracket Assembly 25a Jack Unscrew Procedure 26 Protective Boot Attachment 28a Elevation Jack Step 29b Left Side Frame Attachment Embedded Pipe Ground Mount Assembly Step29d Elevation/Azimuth Strut Assembly Step Elevation/Azimuth Strut Assembly29f Elevation Axis Weldment Attachment 29g Azimuth Strut/Pointer Attachment 29i Fine Azimuth Adjustment Attachment 30a Domestic Pack Reflector Unpacking Step30b Export Pack 31 Reflector Seam Alignment Step Assembly32 Seam Bolt Insertions Very Important 33c Alignment Bolt Insertions 34a Mounting Ring Placement 35a Mounting and Center Rings -35b Mounting and Center Rings Alignment Test Step Enclosure Pedestal Mount Only Step 38a Enclosure Final Assembly39a Enclosure Hardware Step 43 Safety Rope Tag Lines Reflector-to-Mount Assembly Using a Crane Step44b Crane Lift Without a Crane Step 46 Reflector to Mount 48 Enclosure Bracket Alignment Step 50a Reflector to Mount Reflector-to-Mount Assembly Embedded Pipe Ground Mount Step Subreflector Step 52a Subreflector Strut Assembly53a Subreflector Assembly 53c Subreflector Assembly 54a Subreflector Attachment Subreflector Struts Embedded Pipe Ground Mount Assembly Step Subreflector Adjustment Step Step Step Feed System Operation Overview Acquiring a Satellite StepPure Noise Signal on Spectrum Analyzer Step Polarization at 45 degrees from Optimum Setting Maximizing Odd Transponders Operation Subreflector Adjustment Overview General Cleaning Electrical Parts Preventive MaintenancePreventive Maintenance Antenna Preventive Maintenance Drive System Voltage Current Checks Step Step Pedestal Mount Bearing Pad Adjustment Preventive Maintenance Jackscrews/Motors Gear Motor/Housing Fill Drain Requirements Service Lube Quantity Andrew
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