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MiniMast © EMC TEST SYSTEMS, L.P. MARCH 2002
REV D PN 399235
Model 2075

MiniMast

MANUAL











MODEL 2075 MINIMAST


© EMC TEST SYSTEMS, L.P. MARCH 2002


REV D PN 399235
EMC Test Systems, L.P. reserves the right to make changes to any products described herein in order to
improve function, design or for any other reason. Nothing contained herein shall constitute EMC Test
Systems, L.P. assuming any liability whatsoever arising out of the application or use of any product or
circuit described herein. EMC Test Systems, L.P. does not convey any license under its patent rights or the
rights of others.

© Copyright 2002 by EMC Test Systems, L.P. All Rights Reserved.
No part of this document may be copied by any means
without written permission from EMC Test Systems, L.P.






















Note: Model 2075 shown with optional base cover on the front of this manual.








E-MAIL & INTERNET
Support@ets-lindgren.com
http://www.ets-lindgren.com


USA
1301 Arrow Point Dr., Cedar Park, TX 78613
P.O. Box 80589, Austin, TX 78708-0589
Tel 512.531.6400
Fax 512.531.6500
FINLAND
Euroshield OY
Mekaanikontie 1
27510, Eura, Finland
Tel 358.2.838.3300
Fax 358.2.865.1233

SINGAPORE
Lindgren RF Enclosures Asia-Pacific
87 Beach Road
#06-02 Chye Sing Building
Singapore 189695
Tel 65.536.7078
Fax 65.536.7093
MODEL 2075 MINIMAST
© EMC TEST SYSTEMS, L.P. MARCH 2002
REV D PN 399235

Table of Contents

INTRODUCTION......................................................................................................... 1
STANDARD CONFIGURATION................................................................................ 2
MODEL 2075 OPTIONS .............................................................................................. 3
PRECAUTIONS ........................................................................................................... 4
ASSEMBLY INSTRUCTIONS .................................................................................... 6
ELECTRICAL INSTALLATION................................................................................ 9
C
ONNECTING THE
M
ODEL
2090 P
OSITIONING
C
ONTROLLER
........................................ 13
SETTING TRAVEL LIMITS..................................................................................... 15
ABOUT THE BRAKES.............................................................................................. 16
C
ARRIER
S
AFETY
B
RAKE
............................................................................................ 16
E
LECTRIC
B
RAKE
....................................................................................................... 16
OPERATION .............................................................................................................. 18
E
DITING
M
ODEL
2090 P
OSITIONING
C
ONTROLLER
C
ONFIGURATION
P
ARAMETERS
...... 18
T
OWER
E
NCODER
C
ALIBRATION
................................................................................. 18
A
NTENNA
M
OUNTING
I
NSTRUCTIONS
......................................................................... 20
P
RE
-
OPERATIONAL
C
HECKS
........................................................................................ 20
S
TART
-
UP AND
S
AFE
S
HUTDOWN
................................................................................ 20
HAND CONTROL UNIT ........................................................................................... 22
RECOMMENDED MAINTENANCE ....................................................................... 23
E
VERY
S
IX
M
ONTHS
................................................................................................... 23
E
VERY
12 M
ONTHS
.................................................................................................... 24
SPECIFICATIONS..................................................................................................... 25
WARRANTY STATEMENT ..................................................................................... 26
EUROPEAN COMMUNITY DECLARATION OF CONFORMITY ..................... 27
ILLUSTRATIONS...................................................................................................... 28




MODEL 2075 MINIMAST


© EMC TEST SYSTEMS, L.P. MARCH 2002


REV D PN 399235

NOTICE: This product and related documentation must be reviewed for familiarization
with safety markings and instructions before operation.
SAFETY SYMBOL DEFINITIONS
GENERAL SAFETY CONSIDERATIONS
REFER TO MANUAL When product is marked with this symbol refer to
instruction manual for additional information.
HIGH VOLTAGE Indicates presence of hazardous voltage. Unsafe practice
could result in severe personal injury or death.
PROTECTIVE EARTH GROUND (SAFETY GROUND)
Indicates protective earth terminal. You should provide uninterruptible safety
earth ground from the main power source to the product input wiring
terminals, power cord, or supplied power cord set.
CAUTION Denotes a hazard. Failure to follow instructions could result in
minor personal injury and/or property damage. Included text gives proper
procedures.
WARNING Denotes a hazard. Failure to follow instructions could result in
SEVERE personal injury and/or property damage. Included text gives proper
procedures.
BEFORE POWER IS APPLIED TO THIS INSTRUMENT,
GROUND IT PROPERLY through the protective conductor of the AC power
cable to a power source provided with protective earth contact. Any
interruption of the protective (grounding) conductor, inside or outside the
instrument, or disconnection of the protective earth terminal could result in
personal injury.
BEFORE SERVICING: CONTACT ETS-LINDGREN - servicing
(or modifying) the unit by yourself may void your warranty. If you attempt to
service the unit by yourself, disconnect all electrical power before starting.
There are voltages at many points in the instrument which could, if
contacted, cause personal injury. Only trained service personnel should
perform adjustments and/or service procedures upon this instrument.
Capacitors inside this instrument may still be CHARGED even when
instrument is disconnected from its power source.
ONLY QUALIFIED PERSONNEL should operate (or service) this equipment.
MOVING BOOM Keep clear during tower operation. A falling boom
can cause serious injury.
!
CAUTION
WARNING
WARRANTY
OR MODEL 2075 MINIMAST

Introduction
© EMC TEST SYSTEMS, L.P. MARCH 2002

1
REV D PN 399235
INTRODUCTION

The ETS-Lindgren Model 2075 MiniMast is a portable electric
powered mast and platform system designed to be used with the
Model 2090 Positioning Controller for EMI compliance testing.
The MiniMast is designed for antenna scanning from 1m to 2m,
with a 2 m mast extension included so that 1m to 4 m scans can be
performed. The mast, carrier, platform, lifting rope and guying
system are non-conductive and non-magnetic. The mast sections of
the tower are constructed of square fiberglass tubing for strength,
rigidity, and weather-ability.

The MiniMast features an offset boom which maintains a
constant rotational axis along the centerline, when the antenna is
rotated from horizontal to vertical polarization. A cable guide at
the back end of the boom feeds the coaxial cable to the antenna
while maintaining the appropriate bending radius. The air
polarization feature allows for remote polarization of the antenna
using the Model 2090 Controller or the optional Hand Control
Unit.

The antenna carrier is raised and lowered by a fractional
horsepower electric gear motor with an integral fail-safe electric
brake. The motor and its associated electronics are contained in a
shielded enclosure mounted on the base of the unit. Under control
of the Model 2090 the motor typically positions the carrier within
one centimeter of the desired location. To prevent over travel of
the carrier in either direction of movement, the motor is outfitted
with mechanical limits. The mechanical limits are set using dual
knobs located outside the motor cover. Soft limits can be set within
the travel range provided by the mechanical limits using the Model
2090 Controller.

The motorbase is connected to the Model 2090 Positioning
Controller via a twin fiber-optic cable assembly. This fiber-optic
cable transmits both directional control and position information.
Power to the motorbase is provided locally to the motor through a
three conductor power cable.
Standard Configuration


MODEL 2075 MINIMAST
2

© EMC TEST SYSTEMS, L.P. MARCH 2002


REV D PN 399235
A safety brake is mounted on the carrier assembly. In the event
that the carrier is released from its rope suspension, a spring-
loaded lever jams the brake into position against the mast and
locks the carrier so that further vertical movement is restricted.

Mylar rope guy lines are provided for outdoor installations and