The probe LF-B 3 is a passive near-field probe. The measuring coil in the LF-B 3 probe is rotated 90° in contrast to its position in the LF-R 3 probe. The LF-B 3 detects magnetic field lines emitted from the measured object at 90°. Magnetic field lines which enter the probe laterally are not detected. The near-field probe is small and handy. It has a current attenuating sheath and is, therefore, electrically shielded. It can be connected to a spectrum analyzer or an oscilloscope with a 50 Ω input. The H-field probe does not have an internal terminating resistance of 50 Ω.