ETS-Lindgren 3121D Dipole - Manual (Page 7)

Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 3121D
Adjustable Dipole Antenna System is
designed to operate over the 30 MHz to
1 GHz frequency range for
measurements to meet military, DOD,
VDE, and FCC EME measurement
specifications.
3121D DB-1
The Model 3121D includes the DB-1, DB-2, DB-3, and DB-4 antennas.
The antennas are lightweight and sturdily
constructed for portability and
ruggedness. A carrying case supplied
with the antenna set allows for organized
storage and access to all antenna
components. Also included is a
measuring tape for adjusting the dipole
elements to frequency.
3121D DB-2
The dipole elements are made from
nickel-plated brass extension elements
with four special extension rods for
operation at the lowest frequencies. Each
set of elements is designed to be
mounted into a particular balun.
3121D DB-3