EN 50492:2008/A1:2014

SLOVENSKI STANDARD
01-maj-2014
Osnovni standard za terensko merjenje jakosti elektromagnetnega polja v zvezi z
izpostavljenostjo ljudi v okolici baznih postaj - Dopolnilo A1
Basic standard for the in-situ measurement of electromagnetic field strength related to
human exposure in the vicinity of base stations
Grundnorm für die Messung der elektromagnetischen Feldstärke am Aufstell- und
Betriebsort von Basisstationen in Bezug auf die Sicherheit von in ihrer Nähe befindlichen
Personen
Norme de base pour la mesure du champ électromagnétique sur site, en relation avec
l’exposition du corps humain à proximité des stations de base
Ta slovenski standard je istoveten z: EN 50492:2008/A1:2014
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
33.070.01 Mobilni servisi na splošno Mobile services in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50492/A1
NORME EUROPÉENNE
March 2014
EUROPÄISCHE NORM
ICS 17.220.20; 33.070.01
English version
Basic standard for the in-situ measurement of electromagnetic field
strength related to human exposure in the vicinity of base stations

Norme de base pour la mesure du champ Grundnorm für die Messung der
électromagnétique sur site, en relation elektromagnetischen Feldstärke am
avec l’exposition du corps humain à Aufstell- und Betriebsort von
proximité des stations de base Basisstationen in Bezug auf die Sicherheit
von in ihrer Nähe befindlichen Personen

This amendment A1 modifies the European Standard EN 50492:2008; it was approved by CENELEC on 2014-
01-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
the conditions for giving this amendment the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CENELEC member into its own language and notified to the
CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50492:2008/A1:2014 E

Foreword
This document (EN 50492:2008/A1:2014) has been prepared by CLC/TC 106X,
"Electromagnetic fields in the human environment".

The following dates are fixed:
• latest date by which this document h (dop) 2015-01-06
as to be implemented at national
level by publication of an identical
national
standard or by endorsement
• latest date by which the national (dow) 2017-01-06
standards conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying
any or all such patent rights.
__________________
- 3 - EN 50492:2008/A1:2014
Table of Contents
Add:
Annex L (informative) FDD LTE measurements .
L.1 General .
L.2 Maximum LTE exposure .
L.2.1 Introduction .
L.2.2 Method using a dedicated decoder .
L.2.3 Method using a basic spectrum analyser .
L.3 Instantaneous LTE exposure measurements .

Add to the table of figures
Figure L. 1 - LTE time-frequency plan
Figure L. 2 - Illustration of the boosting factor BF, specific to each network operator
Figure L. 3 - LTE spectrum: PBCH power higher than RS power
Add to the table of tables
Table L. 1 - Theoretical extrapolation factor, n as function of the bandwidth, assuming all
RS
subcarriers are at the same power level.

10 Assessment of the field strength at maximum traffic of a
cellular network
Replace the last paragraph:
"For WiFi the measurements and extrapolation shall take into account the specificity of this
signal related to the variation of the time occupation (technical parameters such as channel
occupancy etc are described in Annex J)."
by
"For Wifi and LTE the measurements and extrapolation shall take into account the specificity
of these signals related to time occupation (technical parameters are described in Annex J
and Annex L)."
- 5 - EN 50492:2008/A1:2014
Add Annex L:
Annex L
(informative)
FDD LTE measurements
L.1 General
Annex L describes methods to measure and extrapolate LTE (MIMO 2x2 and MIMO 2x1)
exposure level (FDD LTE [1]). This annex is not an exhaustive summary of existing methods,
and other measurement methods for LTE have been published [2]. The proposed methods
require classical radiofrequency (RF) measurement instruments: a basic spectrum analyser
or a dedicated decoder and an isotropic antenna.
LTE emissions consist of specific signals at specific time-frequency allocations [3] [4]. This
kind of dynamic time-frequency allocation is known as Orthogonal Frequency Division
Multiple Access (OFDMA). See Figure L.1.

Figure L.1 - LTE time-frequency plan
As for other telecommunication signals, LTE signals are subject to time variations because of
traffic variations and random fluctuations of the propagation medium. The extrapolation to the
maximum traffic should be based on the measurement of a time independent channel or
signal. Due to the LTE specifications, the power of each time-frequency unitary element [1]
(66,7 µs, 15 kHz) in the LTE downlink signal is scalable from one kind of transmitted data to
another. In addition, LTE downlink spectrum is totally flexible and may vary from 1,4 MHz to
20 MHz, and inside the spectrum, the power level may vary from one channel to another.
...