Gigahertz Solutions HFW59D Instruction Manual page 12

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therefore, such as those for instance done for cell phone oper-
ators, it may be useful to have a possibility of comparison.
Users of professional spectrum analysers please note:

The value for pulsed radiation shown on the display of the Gigahertz Solu-
tions HF Analysers with the signal switch set to "Peak" corresponds to the
equivalent value in µW/m² resulting from the "Max. Peak" function of a mod-
ern spectrum analyser (elder spectrum analysers had a similar function most-
ly called "positive peak").

The switch setting "RMS" corresponds the "true RMS" setting of a modern
spectrum analyser (elder spectrum analysers have a similar function mostly
called "normal detect", as well as a setting for the video bandwidth adapted
to match the pulse).
Peak Hold
In the interior, local peak values are mostly subject to strong fluc-
tuations (caused by multiple reflections). In order not to overlook
any local maxima (so called hot spots), indoor measurements
should, therefore, preferably be done with the "Peak hold" setting.
Switching impulses can cause "pseudo peaks" which will appear
on your display. These can be deleted by pressing and holding
the "clear" button for several seconds (while keeping the "clear"
button pressed, the measurement will turn into a regular peak
measurement). Releasing the "clear" button will trigger the period
during which the maximum value is to be determined.
In the "Peak hold" mode, the sound signal remains proportional to
the currently measured power flux density. This helps finding the
absolute maximum within the measured area.
The droop rate, at which the held peak value decreases over time can be con-
trolled with the "+" and "-" switch. Even after several minutes, the value dis-
played is still within the specified tolerance. Nevertheless, the display should be
checked frequently in order to obtain the most accurate readings. In the case of
very high and short signal peaks, the holding capacity of the "Peak hold" func-
tion needs several recurrences (less than a second) to fully load.
Setting:
"VBW"
For the HFW59D, "VBW Maximum" is the standard setting with
which the most common sources of radiation within the meter
frequency range, i.e.
 Radar (a short beep every few seconds) as well as
 Wireless LAN in standby mode (a very quick "tuc-tuc-tuc-...")
are displayed directly, without the need of any conversion factors.
In the process of up- and downloading data via wireless LAN or
within the upper LTE band, the so called crest factors need to be
additionally taken into consideration. In this case, the displayed
value needs to be taken by 4 (or doubled twice). With the help of
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