ETS-Lindgren 2071B Antenna Positioning Tower (Archived) - Manual (Page 7)

Introduction | 7
1.0 Introduction
The ETS-Lindgren
Model 2070B (non bore sight)
and Model 2071B (bore sight)
Antenna Positioning Towers
are portable mast and platform
systems designed for use in
EMI compliance testing at
elevations from one to
four meters above the ground
level.
The mast, carrier, boom,
platform, drive belts, and guying
system are non-conductive and
non-magnetic. The carrier is
raised and lowered by a
fractional horsepower electric
motor with a gear reducer and
electric brake. The electronics
are contained in a shielded
enclosure and the unit receives
signals through fiber optic
cables. The electric drive unit is
located at the base of the tower.
Model 2070B non bore sight
(partial mast shown)
The single-piece mast is
constructed of square fiberglass
tubing for strength, rigidity, and
weatherability. Mylar rope guy
lines are provided for outdoor
installations and must be firmly
anchored to provide vertical
stability. The carrier is made of
non-metallic material, primarily
nylon and delrin.
Model 2071B bore sight (partial mast shown)
The motor system drives the carrier up and down using a polyurethane
KEVLAR® reinforced timing belt. Rollers on the carrier provide friction-free,
smooth travel. The motor typically positions the carrier within two centimeters of
the desired location.
Archived 06/24/14