Amendment 2 - Methods of measurement for radio equipment used in the mobile services - Part 1: General definitions and standard conditions of measurement

General Information

Status
Published
Publication Date
26-May-1999
Current Stage
PPUB - Publication issued
Start Date
31-May-1999
Completion Date
27-May-1999
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IEC 60489-1:1983/AMD2:1999 - Amendment 2 - Methods of measurement for radio equipment used in the mobile services - Part 1: General definitions and standard conditions of measurement
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INTERNATIONAL IEC
STANDARD
60489-1
1983
AMENDMENT 2
1999-05
Amendment 2
Methods of measurement for radio equipment
used in the mobile services –
Part 1:
General definitions and standard conditions
of measurement
Amendement 2
Méthodes de mesure applicables
au matériel de radiocommunication
utilisé dans les services mobiles –
Partie 1:
Définitions générales et conditions
normales de mesure
 IEC 1999  Copyright - all rights reserved
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XA
International Electrotechnical Commission
For price, see current catalogue

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– 2 – 60489-1 Amend. 2 © IEC:1999(E)
FOREWORD
This amendment has been prepared by IEC technical committee 102: Equipment used in radio
communications for mobile services and for satellite communication systems.
The text of this amendment is based on
FDIS Report on voting
102/41/FDIS 102/49/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
A bilingual version of this amendment may be issued at a later date.
___________
Add the following reference to the list of "Other IEC publications quoted in this standard":
IEC 60489-8:1984, Methods of measurement for radio equipment used in the mobile services –
Part 8: Antennas
Page 54
Add the following Annex A after figure 3.
Annex A
(normative)
Guide for the use of test sites and radio-frequency
coupling devices (RFCDs)
A.1 General
Test sites are basic means to perform radiation measurements. Radio-frequency coupling
devices (RFCDs) are means generally designed to perform many equipment radiation
measurements economically, using the same measuring method as equipment with antenna
terminals.
This annex describes low reflection test sites (LRTS) and anechoic chambers (AC) for upper
frequency limit extension and interference-free measurements, as well as random field
measurement sites for measurements similar in the real field and for measurement equipment
with a diversity antenna. TEM cells and GTEM cells are also described for wideband upper-
frequency limit extension and interference-free measurements.
The evaluation measurement of a test site is the method to judge whether a test site
construction satisfies the required conditions and is introduced for LRTS, AC and RFM sites in
this annex. The evaluation measurement for OATS was studied, but not introduced because
the available evaluation measurement required important measurement condition changes.

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60489-1 Amend. 2 © IEC:1999(E) – 3 –
The calibration method for a test site is the process for determining the numerical relationship
between equipment radiation power and the observed output of a radio-frequency signal
generator which replaces the EUT during the substitution measurement, or the numerical
relationship between the field strength where the EUT is placed and the indication of the
selective measuring device with the calibration antenna.
RFCDs were originally used only for ratio measurement of equipment receiving radio-frequency
electromagnetic energy. The radiation sensitivity measured in the RFCD was called "the
reference sensitivity (RFCD)" and defined as the level of RFCD input signal in microvolts (μV).
This annex also describes calibration methods. Calibration is the procedure for determining the
numerical relationship between RFCD input or output voltage and the equivalent field strength
where the EUT is placed, or the radiated power of the EUT. RFCDs should be principally
calibrated. Therefore, RFCDs need no evaluation measurement.
Test site overview and overview of RFCDs are shown in tables A.1 and A.2 respectively.
Table A.1 – Test site overview
Test sites Advantages Disadvantages
OATS: Open area test site Low construction cost Needs a lot of space
Available for large size EUT Interference from others
Includes ground reflection effects Weather dependency
Measurement fluctuation is
relatively high at frequencies higher
than 1 GHz
LRTS: Low reflection test site Clear and flexible evaluation Does not reflect reality
criterion
Is affected by absorber size
Possible to reduce error
Interference from others
Wide frequency range
Available for large size EUT
No influence of ground reflections
AC: Anechoic chamber No interference Limited lower frequency
No weather dependency Limited EUT size
No influence of ground reflections Expensive, especially for low
frequency
RFM: Random field measurement Few construction site requirements Needs many measurement values
site (anywhere) and their calculation
Evaluation of real world antenna
efficiency
Clear and flexible evaluation
criterion
Available for the evaluation of
diversity antenna

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