Radio Frequency Engineering

Normalized Site Insertion Loss

Measurement Description

Semi anechoic chambers and open area test sites need to be validated in the frequency range from 9 kHz to 30 MHz, in order to use them for magnetic field emission testing. The CISPR 16-1-4 standard describes the Normalized Site Insertion Loss (NSIL), and Reference Site Method (RSM) respectively.

For these validations, magnetic field antennas (Loop) in all three orthogonal arrangements HX (Coaxial), HY (Coplanar - vertical polarization) and HZ (Coplanar - horizontal polarization) are used. A set of transmission loss measurements is performed at a test distances of 3 m, 5 m or 10 m in a fixed height of 1.3 m above ground plane. Similar to the classical NSA validation, the volumetric test method is applied.

The use of our calibrated active transmit/receive antennas (Precision Loop Antenna PLA) with integrated amplifier and a network analyser is included. No automatic antenna mast is required, as our PLA antennas system is easy to setup and align, thanks to its integrated tripod and laser system.


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