Chapter 12 EMF (EMI) Operation
EMF measurements
184 9102 Handheld Spectrum Analyzer Software version 5.31
The equipment and the methods used vary according to measurement
type. With the 9102 Handheld Spectrum Analyzer in conjunction with
the 9131 EMF Measurement Option and the appropriate accessories,
i.e. antennas, Aeroflex offers a measurement solution covering the
different approaches and requirements.
In the following two sections the radiation emission and immission
concepts are explained. Furthermore these sections provide you with
an overview on the equipment needed in order to perform EMF
measurements depending on the measurement approach.
Radiation emission Using this measurement type operators of cellular networks and
broadcast stations verify that the radiation of a particular transmitter
installed is within the limits specified by law and regulatory bodies. In
many countries worldwide regulatory bodies stipulate a proof of regu-
lation adherence. The radiation emission measurement is a directional
measurement determining the electromagnetic field emitted by a
transmitter. Within the measurement setup a directional antenna helps
to measure the emitted radiation.
Measurement setup for
emission measurements
For performing emission measurements according to ICNIRP (Interna-
tional Commission on Non-Ionizing Radiation Protection) standard with
the 9102 you just need the following two pieces of equipment:
– 9102 Handheld Spectrum Analyzer equipped with the
9131 EMF Measurement Option and the 9132 RMS Detector
Option
– A directional antenna
Aeroflex offers two different directional antennas for performing radia-
tion emission measurements. For a detailed description of these two
antennas refer to “Directional antennas” on page 193.
This measurement setup consisting of the 9102 and the directional
antenna provides a handheld solution for performing radiation emis-
sion measurements easily and efficiently.
Radiation immission For engineering offices and regulatory bodies the specific radiation
exposure caused by all radiation sources in a particular place is of
special interest. During an immission measurement the electromag-
netic field exposure is measured at different locations within a desig-
nated area to identify minimum and/or maximum radiation. Typical
applications for this kind of measurement are for example:
– Measurements for defining security zones in close proximity of
transmitter sites
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