The two H-field probes cover the frequency ranges from 9 kHz to 30 MHz and 30 MHz to 1 GHz. They have the directivity of loop antennas and are electrically shielded so that capacitive coupling is suppressed and electric fields are rejected. Each probe comes with typical correction factors to determine the magnetic field strength for an input impedance of 50 Ω of the measuring receiver. This ensures a high reproducibility of measurements. The two H‑field probes are passive and can be operated bidirectionally so that local immunity tests can be performed. It is therefore possible to induce currents into lines and test signals into components by applying a known signal source to the probe input.
The active E-field probe is designed for omnidirectional signal reception over the entire frequency range. When approaching a radiation source, the probe is capacitively coupled. The E-field probe is powered by the included DC supply.
The E-field probe is operated on DC power. It can be powered from almost all Rohde & Schwarz measuring receivers and spectrum analyzers. The corresponding connecting cables are included in the equipment supplied.
An included test jig allows functional testing of the H‑field probes as well as simplified normalization of H-field measurements using tracking generators integrated in the measuring receivers and spectrum analyzers. The test jig includes a terminated stripline shaped to take up H-field probes.
The 30 dB broadband preamplifier improves the S/N ratio in low-level measurements using H-field probes. Providing a gain of 30 dB in the frequency range from 9 kHz to 1 GHz, it has a noise figure of typ. < 3 dB and a 1 dB compression point of 8 dBm (output level). It can be powered from almost all Rohde & Schwarz measuring receivers and spectrum analyzers using the supplied connecting cables.