Gigahertz Solutions HFE35C Bedienungsanleitung Seite 11

Control elements and Quick Start Guide
Connecting socket for antenna cable. The an-
tenna is inserted into the "cross like" opening at the
front tip of the instrument. Important: Do not bend
the cable too sharply or overtighten the connector
screw!
switch
„Power" On/Off
„Signal" For building biological assessment use „Peak".
„Range" Set the sensitivity according to the level of radiation.
Attenuator knob for audio analysis of digital HF
services
All meters include an Auto-Power-Off-feature.
When the "Low Batt" indicator appears in the centre of the display, measurement values
are not reliable anymore. In this case the battery needs to be changed. If there is nothing
displayed at all upon switching the analyzer on, check the connections of the battery or
change battery. (See „Changing the Battery")
Introduction to Properties of HF Radiation and
Consequences for their Measurement
Permeation of many materials
In particular for measurements inside of buildings it is important to
know that construction materials are permeable for HF radiation
to a varying degree. Some part of the radiation will also be re-
flected or absorbed. Wood, drywall, and wooden window frames,
for example, are usually rather transparent spots in a house. More
information can be found on our website.
Polarisation
Most High Frequency radiation ("waves") is vertically or horizon-
tally polarised. With the antenna attached the meter measures the
vertically polarised component, if the display is positioned hori-
zontally. By rotating the meter around its longitudinal axis you will
be able to pick up any polarisation plane.
Fluctuations with regard to space and time
Reflections can cause highly localised amplifications or cancella-
tions of the high frequency radiation, in particular inside buildings.
This is why one should stick to the step-by-step procedure in the
next chapter.
In addition, most transmitters and cellular phones emit with con-
siderably varying power during a given day and in the long term,
depending on local reception and load. Therefore repeat meas-
urements at different times of the day on working days and at
weekends. In addition it may be advisable to repeat them occa-
sionally over the year, as the situation can change over night. As
an example, a transmitter only needs to be tilted down by a few
© Gigahertz Solutions GmbH
Made in Germany
English
( = "Off" )
11