Vertex Standard 7122B, 7133B 1.0 INTRODUCTION

INTRODUCTION

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1.0 INTRODUCTION

The purpose of this manual is to provide the user with the information necessary to

install and operate the Vertex Model 7122B/7133B Antenna Control Unit (ACU). This

manual contains only the information related to the 7122B/7133B ACU and contains

only limited information about the antenna structure or other equipment peripheral to

the 7122B/7133B.

The 7122B/7133B controller series is designed for applications requiring high

reliability and low cost. The readout system provides 0.02E resolution, using

brushless 2.5 KHz resolvers. The motor drive circuit provides the operator with single

speed, real-time drive control.

The 7133B controls the elevation and azimuth movement of the antenna and the

polarization movement of the feed horn. The 7122B controls only the elevation and

azimuth movement of the antenna. Otherwise, the 7122B and the 7133B are

identical.

The 7122B/7133B controller consists of the following subsystems:

· Model 7122B/7133B ACU

· Model 7122B/7133B OU

· Resolver

7122 and 7133 are Vertex's basic system model numbers. ACU is the acronym for

antenna control unit, which refers to the 19-inch rack-mountable unit used in the

shelter or other antenna control room. OU is the acronym for outside unit, which

refers to the weather-proof cabinet typically installed near the antenna.

The ACU interfaces with starters and motors for elevation, azimuth, and polarization

positioning of the antenna. The elevation, azimuth, and polarization limit interfaces

are normally closed switches that open upon engagement.

The primary components of the 7122B/7133B ACU are:

· Front Panel