R&S®EMF Monitor
By combining antennas decoupled from each other and from the ground (isotropic loop antenna in the lower frequency range and isotropic E-field antenna in the upper frequency range), site-specific calibration at the test site becomes unnecessary. The measurement is performed with the R&S® ESPI test receiver, which detects strong and weak signals at the same time owing to the combination of preselector and preamplifier. The measurement sequence is handled by special functions of the R&S® RFEX EMF measurement software, which is part of the tried-and-tested portable R&S® TS-EMF system for EMF measurements. Measurement and analysis consist of a series of steps that are repeated in cycles (see figure). After an automatic adjustment of sensitivity in order to prevent overload, the entire frequency range is measured. Different settings can be selected for each frequency subrange. To help ensure that signals are detected in every subrange, the measurement can be repeated with higher sensitivity, if required. Special redefined radio services with suitable bandwidth and specific settings are then measured to also weight these complex signals correctly. After evaluation and data reduction, the plausibility of the signal is checked by means of the bandwidth. The measurement results are transmitted together with the environment and system status data. Intermediate steps and raw data that may be required for subsequent detailed analysis can be stored locally.
