Atec EHP-200 User Manual

Electric and Magnetic Field Measurement

EHP-200
Electric and Magnetic Field Analyzer

New solution for Isotropic Measurements ♦
in the 9 kHz – 30 MHz Range

♦

Electric Fields from 0.02 to 1000 V/m
Magnetic Fields from 0.6 mA/m to 300 A/m ♦
Built-in Frequency Spectrum Analysis ♦
Built-in Rechargeable Battery ♦
Optical Fiber Connection to PC ♦

The E-H fields analyzer model EHP-200 has been designed for accurate isotropic mea­surements of both electric and magnetic fields in the 9 kHz - 30 MHz frequency range,
with no or minimum perturbation of the fields that are being measured.

The field sensors and the electronic measuring circuitry are contained in a rugged
housing, only 3.6 x 3.6 x 4.3 inches in size. Separate 3-axis and total values (peak and
average) are measured with exceptional flatness and linearity of ±0.3 dB. Results are
expressed in V/m, A/m, μT, mW/cm2, W/m2.

The EHP-200 features built-in spectrum analysis with minimum selectable bandwidth
of 1 kHz for detailed measurements of the E and H field intensity vs. frequency, and
a dynamic range of 80 dB. The built-in rechargeable Li-Ion battery provides up to 8
hours of continuous operation.

The EHP-200 is controlled by a PC through the optical fiber link, and measurements
are displayed in real time. An auxiliary input is available for measuring the frequency
spectrum of external applied signals.

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narda Safety Test Solutions an communications company USA • Germany • Italy

USA TEL: [phone] • FAX: [phone] • E-MAIL: [e-mail] • www.narda-sts.us

Electric and Magnetic Field Measurement

Applications

BROADCASTING SURVEILLANCE

The EHP-200 is particularly useful in measuring the actual
fields generated by long, medium and short wave broadcast
transmitters, to ensure safety around the sites of large anten­nas, to control the transmitted power in the actual radiation
direction, to test the functionality of the transmitting anten­nas and to identify the borders between near and far field
regions.

WAVE IMPEDANCE

As a unique feature, the PC program calculates the field wave
impedance by dividing the total value of the E-field by that of
the H-field. This method is particularly suitable for evaluating
the non-linear, scattered near-field region of large broadcast
antenna systems.

FIELDS GENERATED BY METAL DETECTORS AND RFID’S

Fields generated by a number of devices using RF to detect
the presence of metals, to identify objects, anti-theft systems
etc. can now be accurately and easily measured.

EHP-200 Field Analyzer

EHP-200 Control Software

FOR WINDOWS™ OPERATING SYSTEMS

All measuring functions are user-programmable: Resolution
Bandwidth Filter, center frequency and frequency span, pre­amplifier, measuring units, etc.

The Marker function is used to measure the frequency and
amplitude. It features Highest, Next and Previous Peak func­tions, while the Marker Center function sets the display center
frequency at the current marker frequency value.

The Marker also features the Delta Peak function for relative
measurements. The Wide Band field value is calculated with
reference to the measured frequency span.

To immediately evaluate the measured levels, Limit Lines
can be created and displayed on the graphical window. The
measured data can be saved as either text or bitmap, and the
limits can also be saved and recalled.

Blue Line: total Field / Green Line: X-axis
Cyan Line: Y-axis / Magenta Line: Z-axis

narda Safety Test Solutions an communications company USA • Germany • Italy

USA TEL: [phone] • FAX: [phone] • E-MAIL: [e-mail] • www.narda-sts.us

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