AvL TECHNOLOGIES Operation and Maintenance Manual MODEL 1278K Mobile VSAT Antenna System Contents Subject to Change Rev 0, February 2006 900-017-001-A ©Copyright 2006 No part of this document may be photocopied or otherwise reproduced without the prior permission in writing of AvL Technologies, Inc.. Such written permission must also be obtained before any part of this document is stored in an electronic system of whatever nature Downloaded from www.Manualslib.
Model 1278K Mobile VSAT Antenna System 2 Operation and Maintenance Manual TABLE OF CONTENTS SECTION 1 - OVERVIEW 1.1 1.2 PAGE Technical Description Specifications 2 3 SECTION 2 - INSTALLATION AND SETUP 2.1 2.2 2.3 General Installation to Vehicle Controller Operating Instructions 5 5 6 SECTION 3 - AZIMUTH POSITIONING SYSTEM 3.1 3.2 3.3 3.4 3.5 3.
Model 1278K Mobile VSAT Antenna System 3 Operation and Maintenance Manual SECTION 1 — OVERVIEW TECHNICAL DESCRIPTION The Model 1278K Mobile VSAT Antenna System is a three axis positioner featuring the simple, rugged AvL cable drive system which produces very low backlash, high-stiffness and high-reliability when driven by a low backlash, gear box with DC motors.
Model 1278K Mobile VSAT Antenna System 4 Operation and Maintenance Manual Model 1278K MOBILE VSAT 1.2M MOTORIZED VEHICULAR MOUNT Reflector Optics Drive System Mount Geometry Polarization 1.2 Meter Offset, Prime Focus, .
Model 1278K Mobile VSAT Antenna System Motors 5 Operation and Maintenance Manual 24V DC Variable Speed, Constant Torque RF Interface BUC Mounting Waveguide Coax Electrical Interface Manual Drive Weight Stowed Dimensions Feed Boom Grove Flexible Waveguide From Feed 2-RG59 run from feed to base plus 25 ft. (8 m) 25 ft. (8 m) Cable with Connectors for Controller Handcrank on Az and El Axii 115 to 125 lbs.
Model 1278K Mobile VSAT Antenna System 6 Operation and Maintenance Manual SECTION 2 — INSTALLATION AND SET-UP Model 1278K K Mobile VSAT 2.1 GENERAL The AvL Model 1278K Mobile VSAT positioner has been fully tested with the TracStar Systems controller prior to shipment. All position feedback, limit sensing, limit switches and motor speeds have been calibrated or set. The positioner needs only to be deployed and the coax and control cables connected to the controller. 1.
Model 1278K Mobile VSAT Antenna System 7 Operation and Maintenance Manual 2.3 CONTROLLER OPERATING INSTRUCTIONS The TracStar Systems controller applies advanced motor control capability in a cost effective controller. The controller is configured to require only two commands – Deploy and Stow. When the controller receives the Deploy command the antenna is raised to a preset elevation angle where it scans in azimuth until approximate southern direction is determined.
Model 1278K Mobile VSAT Antenna System 8 Operation and Maintenance Manual Change Polarization: Setting the POLARITY (horizontal or vertical downlink): 1. From the READY screen, press “÷” three times to move to the POLARITY screen. 2. The blinking cursor will be over “HorzDN” or “VertDN”. 2.1 Press “+” to change the downlink polarity from H to V. 2.2 Press “ENTER” to save the value. Changing the REF Satellite: (In case of blockage of pre-programmed REF satellite) 1. 2. 3. 4. 5. 6.
Model 1278K Mobile VSAT Antenna System 9 Operation and Maintenance Manual * Changing the DATA satellite *: 1. 2. 3. 4. From the READY screen, press “ ÷” twice to move to the “DATA satellite” screen. The blinking cursor will be over “SatA/SatB”. 2.1 Press “+” to change the DATA satellite from A to B. Press “ENTER” to move the blinking cursor to “Satellite A”. 3.1 Press “+” or “-“ to change the longitude value for DATA satellite A. 3.2 Press “ENTER” to save the value.
Model 1278K Mobile VSAT Antenna System 10 Operation and Maintenance Manual SECTION 3 - AZIMUTH POSITIONING SYSTEM 3,1 AZIMUTH BEARING The azimuth platform sits on top of a ball bearing platform with a dynamic and static moment capacity of over four times the worst-case wind load specification. It is surrounded by double seal to protect the bearing platform, which is permanently lubricated. This rests on the azimuth drum and the azimuth cables wrap around the drum and capstan.
Model 1278K Mobile VSAT Antenna System 11 Operation and Maintenance Manual 3.4 AZIMUTH AvL CABLE DRIVE The patented azimuth AvL cable drive produces a drive system with zero backlash high stiffness, no wear, no lubrication, and maximum reliability. The system consists of three 5/64 7x19 stainless steel aircraft control cables reverse wrapped twice around the grooved capstan (Figure 3.2) and once around the drum, with solid connections on one end and high force Belleville springs on the other end.
Model 1278K Mobile VSAT Antenna System 12 Operation and Maintenance Manual 3.5 AZIMUTH POSITION FEEDBACK The azimuth position feedback is produced by a 10 turn, 1K-ohm potentiometer driven by the output shaft of the worm gear box. (Fig 3.1) Since the AvL cable drive has no backlash, the position feedback is as accurate (1%) as the resolution (.3°) and accuracy of the potentiometer and the backlash between the potentiometer and the azimuth capstan.
Model 1278K Mobile VSAT Antenna System 13 Operation and Maintenance Manual SECTION 4 — ELEVATION POSITIONING SYSTEM 4.1 ELEVATION PIVOT ASSEMBLY The elevation pivot assembly consists of two elevation drum assemblies pivoting between two clevis blades assemblies. The drum shafts pivot in hi-tech plastic bushings. No maintenance is required. If squeaking noise is heard, simply spray silicone lubricant with “straw” nozzle down between the drum side and clevis plate on to the pivot shaft. 4.
Model 1278K Mobile VSAT Antenna System 14 Operation and Maintenance Manual The position should be checked per the periodic maintenance schedule in Section 6. If the cables have drifted, manually move cables using blunt instrument on elevation drums until correct position is obtained. At installation the Belleville springs are collapsed until no "air" is seen between the springs. You should check this condition yearly to account for the slow settling of the cable strands.
Model 1278K Mobile VSAT Antenna System 15 Operation and Maintenance Manual SECTION 5— FEED AND POLARIZATION POSITIONING SYSTEM 5.1 GENERAL The Feed assembly consists of feed boom, upper and lower feed brackets, feed housing, RF components and polarization drive housing. The pivot connection at the end of the feed is made with brash bushings. A piece of 18" flex wave-guide is used at the end of the wave-guide tube to the OMT and connects to the BUC.
Model 1278K Mobile VSAT Antenna System 16 Operation and Maintenance Manual 5.5 POLARIZATION LIMITS TracStar Systems Controller uses the polarization potentiometer voltage to determine limits. The controller drives to 0° pol when it stows. The AvL positioner has the mechanical capability of +/-92.5 degrees per section 3.3 of the TracStar Systems Controller Manual. If the Controller Fails to terminate power to the motor and the system is driven to a hard limit stop, the DC motor will stall.
Model 1278K Mobile VSAT Antenna System 17 Operation and Maintenance Manual SECTION 6 — MAINTENANCE 6.1 GENERAL The AvL Model 1278K Mobile VSAT is designed such that any wear should never degrade performance below specifications and essentially no maintenance will ever be required. However, since it is impossible to ascertain or test for all possible environments, the following check up is recommended each year. If any problems are observed, refer to the appropriate section. 6.
Model 1278K Mobile VSAT Antenna System 18 Operation and Maintenance Manual 6.3 SPARE / REPLACEMENT PARTS Since no maintenance is required, only electrical parts are recommended as spares. These parts will not fail from activity, but may fail from environmental exposure. Description Manufacture Manufacture Part No.
Model 1278K Mobile VSAT Antenna System 19 Operation and Maintenance Manual SECTION 7 - INTERFACE DRAWING Downloaded from www.Manualslib.
Model 1278K Mobile VSAT Antenna System 20 Operation and Maintenance Manual SECTION 7 - INTERFACE DRAWING Downloaded from www.Manualslib.
