Introduction - Andrew 4.9-Meter ESA Operating And Maintenance

4.9-Meter Earth Station Antenna

Introduction

Like all Andrew earth station antennas, the 4.9-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-
or circularly-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 reflector assembly is 16-feet (4.9-meters) in diameter and segmented in
a twelve piece configuration to reduce shipping volume and facilitate transport to remote
sites. Reflector panels are conversion coated and painted with a flat white paint.
The manual pedestal tube mount features 360 degree azimuth coverage in continuous
40 degree ranges and executes 90 degree (0 - 90 degree) continuous elevation adjust-
ment. The manual mount also features ±20° of continuous fine azimuth adjustment. This
large adjustment range provides the ability to view geostationary satellites from horizon-
to-horizon, from any location worldwide.
The motorizable pedestal tube mount may be purchased which features self-aligning
bearings for the elevation pivots, resulting in "zero" backlash. This mount can be operat-
ed manually, but has the ability to be upgraded for motorized operation, including step-
tracking/Smartrack™ applications. The motorizable mount type is indicated by the
ES49MPJ letters within the antenna type number. The azimuth/elevation jackscrews are
equipped for integration with the optional motor drive systems.
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 motor drive systems
(with power interfaces addressing domestic and international standards), remote micro-
processor antenna control for motor drive systems, pressurization equipment, and inter-
®
connecting HELIAX cables and waveguide.
Introduction
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