The measuring coil of the RFS-B 3-2 H-field scanner probe is arranged orthogonally to the probe shaft. This means that the probe head can be brought close to the assembly and a high level of coupling can be achieved. The RFS-B 3-2 detects magnetic field lines that emerge orthogonally from the measurement object. Magnetic field lines that enter the probe from the side are not detected.
The RFS-B 3-2 is a passive near-field probe. When the probe head is positioned vertically, the measuring coil lies directly on the surface of the printed circuit board. This enables measurements to be taken in hard-to-reach areas of the PCB surface, e.g. between large components of switching regulators. The near-field probe has a sheath current attenuation and is electrically shielded. It is connected to a spectrum analyzer or an oscilloscope with a 50 Ω input. The H-field probe does not have an internal 50 Ω terminating resistor.
