Andrew ES45T manual Introduction

Introduction

Like all Andrew earth station antennas, the 4.5-meter earth station 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 trans- mit/receive as well as receive-only, and for either linearly- or circularly-polarized C-Band, linearly-polarized Ku-Band, Hybrid C-/Ku-Band or X-Band operation. Both pedestal and tripod mount types are available (motorization for pedestal only). The versatility is pro- vided at the time of initial purchase, as well as in the future, as your satellite communi- cations requirements evolve. This manual covers the manual Tripod only.

The segmented aluminum reflector panels are precision formed for accuracy and strength. The 6-piece reflector panel design ensures that the assembled reflector will maintain the extremely accurate surface contour and guaranteed performance without reflector alignment.

The versatile tripod mount features 164° of coarse azimuth coverage in four overlapping ranges, and 90° coarse elevation adjustment. This large range of adjustment provides the ability to view geostationary satellites from horizon-to-horizon, from any location within the continental United States. The broad mount leg spacing enable efficient load transfer to the foundation, providing additional mount rigidity.

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 potential to be upgraded for motorized operation, including steptracking/SmartrackTM applications. The motorizable mount type is indicated by the ES45MP or ES45MPJ letters within the antenna type number. The addition of the letter “J” within the antenna type number indi- cates that the mount includes azimuth/elevation machine jackscrews, instead of corre- sponding azimuth and 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 back structure and hot-dipped galvanized steel mount maintains pointing accuracy and ensures durability and reliability. The antenna and mount will survive 125 mph (200 km/h) wind, in any position of operation, without damage or permanent defor- mation.

Andrew provides a complete line of available options, including field-installable electrical anti-icing heaters, pressurization equipment and interconnecting HELIAX cables and waveguide.

An optional hoisting kit, which precludes the use of a crane, is available from Andrew and can be utilized as an installation tool for multiple installation purposes.

3 Introduction