ESCO Technologies ETS Lindgren 3301B, User Manual

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Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 3301B is a broadband, high sensitivity electric-field
receiving antenna. The Model 3301B is composed of a monopole rod antenna
with a counterpoise, and a broadband, high impedance pre-amplifier. It is
designed to provide reception of an electric field in a signal band without tuning
or band switching from 30 Hz to 50 MHz. The 3 dB roll off points for the antenna
factor are at 170 Hz and 30 MHz. Between 250 Hz and 20 MHz, the antenna
factor is flat /- 1 dB. Despite the roll of the antenna factor, the usable
range is 30 Hz to 50 MHz.
The Model 3301B is designed for maximum sensitivity and dynamic range, and is
capable of sensing fields of 2 dBuV/m at 1 MHz with a 1 kHz bandwidth.
However, it will not saturate below a field strength of 0.7 V/m. As a result, the unit
boasts an extremely wide dynamic range of 115 dB nominal at mid-band. In
addition, at 10 and 30 dB (+/-10%), internal attenuators are provided. With the
attenuators the Model 3301B is usable in fields of up to 22 V/m. Therefore, the
dynamic range of the unit is expanded to 145 dB. A saturation indicator is
provided to alert the user to the need for using the internal attenuators
The Model 3301B is designed to provide the user with an extremely versatile
measurement tool. The flat antenna factor, extreme sensitivity, and ultra-wide
dynamic range make it a state of the art sensing instrument.