Gigahertz Solutions HF58B, Инструкция по эксплуатации

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© Gigahertz Solutions GmbH
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Made in Germany
walk around at slow pace through the in-door or out-door spaces
in question, 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. In in-door
spaces, antenna movements towards the ceiling or the floor will
also reveal astonishing results.
As already mentioned above, the aim of the quick overview
measurement is to identify the zones of local peaks, not to sup-
ply exact data.
Quantitative (numeric) Measurement:
Setting:
“Range” (measurement range)
Start with the “Range” switch set to “max”, and only switch to
“med” or even “min” if the display constantly shows very low val-
ues. Basic rule for measurement range selection:
As coarse as necessary,
as fine as possible.
Recommendations for the range “max”
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:
Values < 0.15 m W/m²: Switch to “med”
Values > 0.15 m W/m² up to 1.5mW/m²:
Use preamplifier HV10 to convert the range of 20,000 (max) to a
range of 2,000! Alternatively, the larger value applies.
If you intend to do comparative measurements (such as “before vs.
after”), please always measure in the same range.
In the case of overload even with the range set to max (display
shows “1” on its left side), the sensitivity of the meter can be re-
duced by a factor of 100 by applying the
attenuator DG20_G3
available as an optional accessory. By setting the “ext. adapt.”
switch to -20 dB on your instrument, you will ensure a correct dis-
play of the measurement value (please note: there will be an in-
creased noise level).
In the case of especially low values with the “Range” switch set to
“min”, the HV10 should also be applied.
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There is a factor of 100 between “med” and “max” thus allowing to display as
large power flux densities as possible withouth having to apply an attenuator.
For technical reasons the highest tolerances must be expected here.