Andrew 3.7-Meter Earth Station Antenna manual Introduction, MeterEarth Station Antenna

3.7-Meter Earth Station Antenna

Introduction

Like all Andrew earth station antennas, the 3.7-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 linearly- polarized 2-port or 4-port combining network. That versatility is provided at the time of initial purchase, as well as in the future, as your satellite communication requirements evolve.

The aluminum reflector is precision formed for accuracy and strength requiring minimal assembly. The versatile pedestal mount can be purchased with either manual or motor- izable capabilities. The pedestal mount features 180 degree azimuth coverage in three continuous 120 degree overlapping ranges and executes 90 degree continuous eleva- tion adjustment. This large adjustment range provides non-critical foundation orientation and the ability to view geostationary satellites from horizon-to-horizon, from any location worldwide.

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 ability to be upgraded for motorized operation, including steptracking/Smartrack™ applications.

The motorizable mount type is indicated by the ES37MPK or ES37MPJK letters within the antenna type number. The addition of the letter "J" within the antenna type number indicates that the mount includes azimuth/elevation machine jackscrews, instead of cor- responding azimuth/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 enclosure and hot-dipped galvanized steel mount maintain pointing accu- racy and ensures durability and reliability. The antenna and standard manual mount with enclosure will survive 125 mph (200 km/h) wind, in any position of operation, without damage or permanent deformation in moderate coastal/industrial areas. Severe condi- tions require additional protection.

Andrew provides a complete line of available options, including field-installed electrical anti-icing heaters, motor drive systems (with power interfaces addressing domestic and international standards), remote microprocessor antenna control for motor drive sys- tems, pressurization equipment, and interconnecting HELIAX® cables and waveguide.

3 Introduction