Step-By-Step Instruction To Hf-Measurement - Gigahertz Solutions HF59B Bedienungsanleitung

When it comes to quantifying the total emission (measurement of
the total pollution) in more detail, the pros and cons of the two
approaches need to be weighed up:
• On the one hand, under typical measuring conditions, an isotropic
measurement has a broader error band by its very nature, and the
interpretation of the results is also more difficult. Yet, the measure-
ment is faster and more encompassing.
• On the other hand, the LogPer antenna offers a higher precision and
better localization for the same kind of work, and the interpretation of
the results is easier. Yet, a comprehensive measurement is more
time consuming and restricted to a smaller frequency band.
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".
Then set the measurement range ("Range") switch to "max". Only if
the displayed measurement values are persistently very low, change
to the measurement range "med" or even to "min".
Note: When switching from "max" to "med", the volume of the audio
signals will increase considerably; between "med" and "min", there is
no difference in volume.
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, but only to listen to the audio signal, you can easily walk
around at a slow pace through the indoor or outdoor spaces in ques-
tion, constantly panning the antenna or the HF analyser with attached
antenna in all directions (forming a horizontal eight). This will provide
you with a quick overview of the situation, especially with regard to local
maxima. In indoor spaces, antenna movements towards the ceiling or
the floor will also reveal astonishing results.
As already mentioned above, the aim of the quick overview meas-
urement is to identify the zones of local peaks, not to supply exact
data.
Quantitative Measurement of the Total Pollution
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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