Step-By-Step-Instruction To Hf-Measurement - Gigahertz Solutions HFW59D Bedienungsanleitung

M a d e in G e r m a n y
given HF radiation source is originating, is a fundamental prerequisite
for effective shielding.
The readings from the instrument's display always reflect the in-
tegral power density at the measurement location coming from
the direction the antenna is pointing at (i.e. based on the spatial
integral of the "antenna lobe").
The LogPer antenna supplied is optimised for a frequency range of
2.4 to 10 GHz. It covers the upper LTE/4G band, the worldwide newly
defined 5G bands between 3 and 4 GHz, all WLAN frequencies, blue-
tooth, zigbee, various radar frequencies (especially also the densely
used frequency band from 8.5 to 9.5 GHz which includes radar for the
control and survey of the air and shipping traffic), as well as further
frequency bands used commercially or for military purposes, espe-
cially for the directional radio. Critical medicals consider these pulsed
or spread spectrum modulated signals as biologically especially harm-
ful.
In order to avoid measurement values to be falsified by the often dom-
inant radiation sources from frequencies below, such as DECT or
GSM, the HFW59D is equipped with an internal high pass filter at 2.4
GHz, causing these lower frequencies to be suppressed.
Step-by-Step-Instruction to
HF-Measurement
Quick Overview Measurement
The HF analyser and antenna are to be checked following the instruc-
tions under "Getting Started".
Set the "Signal" switch to "Peak".
Now set the measurement range ("Range") switch to "max". Only if the
displayed measurement values are persistently very low, change the
measurement range to "min".
HF radiation exposure can differ at each point and from all directions.
Even though the HF field strength of a given space changes far more
rapidly than in the lower frequencies, it is neither feasible nor neces-
sary to measure all directions at any given point.
Since there is no need to look at the display during an overview meas-
urement, you only need to listen to the audio signal. It is very easy to
walk slowly through in-door or out-door spaces in question. In doing
so, constantly move the antenna or the HF analyser with attached an-
tenna in each direction (like a horizontal eight). This will provide you
with a quick overview of the situation, especially with regard to local
maxima. In in-door spaces, antenna movements towards the ceiling
or the floor will reveal astonishing results.
Quantitative Measurement
Hold the HF analyser by the slightly outstretched arm with your
hand at the bottom end of the instrument.
In the area of a local maximum, the positioning of the HF analyser
should now be changed until the highest power density (i.e. the most
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