High Frequency EMR

The high-frequency (HF) meters offered feature several technical innovations, some of them patented. They all come equipped with a directional measuring antenna; this antenna helps you to locate the source of high-frequency (HF) radiation, whether it is a cell phone tower, a base station of a DECT- standard cordless telephone, a wireless LAN or some other source of continuous or pulsed microwave radiation.

Which leads right to the most valuable asset of this series of high-frequency meters: with these meters you can measure continuous radio waves and microwaves as well as pulsed microwave radiation (as used e. g. by GSM, DECT, Bluetooth, W-LAN and TETRA),and also “noise-like” signals as used by 3G (UMTS) mobile standards;in addition the “professional series” meters HF58B-r and HF59B do allow accurate measuring of radar pulses.

For some meters an isotropic antenna is available as an option (HFE-meters); this isotropic antenna does allow the measuring of fields from as low as 27 megahertz. All meters cover the frequency range from 800 megahertz to 2500 megahertz, the professional series meters can be used up to 3300 megahertz,with additional tolerance. All high-frequency meters measure True-RMS; this means the power(power flux density) of the HF-signal is measured directly, and not calculated from another physical value measured. This direct measurement of the power eliminates a possible source of error. The tolerances are given for each meter, so one can actually calculate the measuring error and the high and low tolerance limits. Results of measurement are displayed in microwatts per square meter; recommended exposure limits as suggested by the “Standard of building biology: methods of testing” are included in the manual.

All meters are equipped with an audio signal feature. The volume of this sound signal is proportional to the field-strength measured. All meters (except HF32D) are also equipped with an audio-analysis feature, which is proportional to the low-frequency modulation of the high-frequency signal. This feature helps to identify the form of the momentarily dominating high-frequency signal, which helps to locate the different sources of microwave radiation.

All meters are shipped with an extensive manual in English and German. The manual includes a detailed description of the measuring process, well explained with graphics and pictures.