Test & Measurement

Narrowband instrument minimises isotropy error

30th March 2017
Alice Matthews

Attention towards electromagnetic pollution has grown exponentially in the last decade. According to studies and relative guidelines released by the ICNIRP (International Commission on Non-Ionising Radiation Protection), the EU implemented the directive 2013/35/EU on 1st July 2016. The directive sets safety and health requirements about the exposition of workers and general public to electromagnetic radiations.

The Italian-based company MPB released a range of products in order to meet these European standards: the SEP, a new selective electric isotropic 3-axis system, is its spearhead. The SEP is a narrowband instrument that selectively measures the electric field in a frequency range from 100kHz to 3.6GHz, and is aimed at broadcasting telecommunication, mobile communication systems and industrial sites uses.

It is an all-in-one instrument so the spectrum analyser and the 3-axis antenna are both inside the same sphere: this facilitates the operator’s work on the field and the calibration (since there is only one instrument to calibrate and not three). The three-dipole antennas are directly connected to the receiver, which minimises the isotropy error.

The SEP can be plugged to the PC via a fibre optic cable and its software allows several functionalities such as channel power, multi-channel power, settable markers, max hold, RMS and average in a selectable time.

In addition, thanks to its lightweight nature - it weighs 370g - measurements mounted on a drone are allowed.

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