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Made in Germany
GHz) are still difficult to obtain, so you will only encounter selec-
tive exposures in this frequency range. The WiMAX network (from
3 to 5 GHz) is only active in some testing locations, its extension
all over the country is, however, expected to be accomplished
within the coming two years. Therefore, for the time being, the
HFW35C can be considered as a device enabling to exclude po-
tential stronger exposures caused by these sources at the respec-
tive site. This already is an important information.
The presently most frequently measured appliances are Bluetooth
appliances found at the lowest end of the involved frequency
range... Questions related to this field:
"Even when transmitting data with my notebook, only low val-
ues are shown on the display"
Answer:
Thanks to the integrated transmitting power control, the notebook
won't draw more power than needed for its communication with
the remote station. However, if you measure within splitting dis-
tance to a notebook just transmitting data wireless, you will obtain
values, at least in the finer measuring range.
"No measurement values obtained, even directly next to my
WLAN/Bluetooth-compatible notebook..."
"...although the display indicates: 'searching wireless con-
nections'"
Answer:
While searching a network, the notebook is basically not transmit-
ting itself, so obviously no measurements can be obtained.
"...although my notebook shows various networks with good
reception"
Answer:
A notebook has no problems with the reception, even if the signal
strength is a factor 1000 or more below the lowest display value
of the measuring device or below the building biology recommen-
dations.
"In the finer measuring range, the HFW never shows values
lower than 0.3 to 0.5 µW/m² (with or without antenna)"
Answer:
This is the residual noise of the device. It would be easy to wire
the display in such a way that it would approach zero as soon as
only little values are shown, thus suggesting higher precision (par-
adoxically, the producer himself even recommends to do so!).
However, we do not consider this useful, and prefer to indicate
the residual noise the way it is. Yet, if measurements without an-
tenna reach values beyond 0.9 µW/m² within the fine measure-
ment range (or 9 within the coarse measurement range), you
should return the device for investigation, as this does no longer
correspond to the specifications.
Simple testing method:
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© Gigahertz Solutions GmbH
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