RF Field monitoring for EMC Testing. Often underestimated, RF field probes are critical to the implementation of a proper radiated immunity test system. 

All too often, system specifies gloss over this essential element after having spent a considerable amount of time and energy selecting components required to generate the required RF field. After all, what good is an RF field if you can't reliably measure it? 

Frequency Response is undoubtedly the most important probe characteristic. It is defined as the frequency range the probe will respond to. Since no probe can provide a completely flat response across the entire frequency range, this spec is always accompanied by a tolerance figure, generally provided as a ±dB allowable variation band.