IEC 60489-2:1991/AMD1:1999

INTERNATIONAL
IEC
STANDARD
60489-2
AMENDMENT 1
1999-07
Amendment 1
Methods of measurement for radio equipment
used in the mobile services –
Part 2:
Transmitters employing A3E, F3E
or G3E emissions
Amendement 1
Méthodes de mesure applicables au matériel
de radiocommunication utilisé
dans les services mobiles –
Partie 2:
Emetteurs utilisant les émissions
A3E, F3E ou G3E
 IEC 1999 Copyright - all rights reserved
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– 2 – 60489-2 Amend. 1  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 the following documents:
FDIS Report on voting
102/43/FDIS 102/52/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.
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Page 3
CONTENTS
Insert, after clause 12, the following new clause 13:
13 Modulation sensitivity. .
Renumber the existing clause 13 and amend its title as follows:
14 Total distortion factor. .
Renumber clause 14 as clause 15.
Insert the following new clause 16.
16 Compressor characteristics .
Renumber the existing clauses 15, 16, 17 and 18, as 17, 18, 19 and 20, respectively.
APPENDICES
Delete appendices B and D.
Rename appendix C as appendix B.

60489-2 Amend. 1 © IEC:1999(E) – 3 –
Page 5
PREFACE
Add, in the list of quoted publications, after 60244-6 (1976) the following:
60244-7 (1979): Part 7: Cabinet radiation at frequencies above 1 GHz
Add, under 60489-1 (1983) the following:
Amendment 1 (1996)
1)
Amendment 2
With regard to amendment 2, add the following footnote:
Add, under 60489-3 (1988) the following:
ITU-T Recommendation O.41 (1994): Psophometer for use on telephone-type circuits
Page 7
SECTION 1: GENERAL, SUPPLEMENTARY DEFINITIONS AND CONDITIONS
OF MEASUREMENT
5.4 Limitation of the measuring audio-frequency band
Replace, on page 11, this subclause by the following:
Because some properties, for example noise and audio-frequency harmonic distortion, depend
upon the audio-frequency bandwidth of the test equipment, reproducible results can be
obtained only when the band of audio-frequencies occupied by the demodulated signal is
restricted to specified limits.
This restriction may be accomplished by means of a band-limiting filter preceding any audio-
frequency measuring device and adapted to the type of signals to be transmitted. The filter may
be incorporated within the measuring equipment. When measuring residual hum and noise,
only the low-pass portion of the filter need be specified (see appendix A).
Page 13
SECTION 2: METHODS OF MEASUREMENT
8.3.2 Method of measurement at the antenna terminals
Add, on page 15, the following sentence to 8.3.2 a):
If the band rejection filter exhibits unwanted attenuation (certain types of band rejection filters,
such as those constructed with transmission lines or cavities, can have unwanted attenuation
at odd multiples of the centre frequency of the rejection bandwidth), for the measurement of
spurious components at and above the second harmonic of the carrier frequency, the band
rejection filter shall be replaced by a high-pass filter whose cut-off frequency is approximately
1,5 times the carrier frequency.
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1)
To be published.
– 4 – 60489-2 Amend. 1  IEC:1999(E)
Page 17
Replace, in figure 2, the text of legend 8 by the following:
band-rejection filter or high-pass filter (if needed)
Page 19
8.4.3 Method of measurement
Add, at the end of 8.4.3 e), the following note:
NOTE – The permissible input level which does not degrade the receiver performance can be calculated from
P = P – A
≤ P + S – 10 dBm
rt t
r
where
P is the permissible receiver input level, in decibels (dBm);
rt
P is the carrier power of transmitter under test, in decibels per metre (dBm);
t
A is the attenuation recorded in step e), in decibels (dB);
P is the reference sensitivity of the test receiver, in decibels per metre (dBm);
r
S is the selectivity of the receiver, in decibels (dB).
Page 29
Add, before 8.5.7 a), the following note 1:
NOTE 1 – This method of measurement can be applied to the transmitter that has a modulating signal which is
superimposed on the speech signal and cannot be turned off (e.g. continuous tone controlled squelch systems).
Add, to 8.5.7 b), the following note 2:
NOTE 2 – In the case of transmitters that have a modulating signal which is superimposed on the speech signal
and cannot be turned off (e.g. continuous tone controlled squelch systems), operate the transmitter in modulated
condition at the power level specified by the manufacturer (which may correspond to the carrier power measured as
described in 8.2).
Page 33
9 Radiated radio-frequency power
Replace the text of this clause by the following:
These measurements are usually made only on transmitters having integral antennas.
9.1 General
The radiated radio-frequency power output of a transmitter may contain
– average radiated carrier power (see 9.2);
– maximum effective radiated carrier power (see 9.3);
– RFM (random field measurement) radiated carrier power (see 9.4);
– RFCD radiated carrier power (see 9.5);
– modulation components determining transmission quality (see clauses 12, 13, 14 and 16);

60489-2 Amend. 1 © IEC:1999(E) – 5 –
– other modulation components (e.g. components contributing to the adjacent channel power)
(see 9.8);
– spurious narrow-bandwidth components (see 9.6);
– noise, both inside the band (see clause 18) and outside the band, where it is called
spurious transmitter noise (see 9.7);
– inter-transmitter intermodulation products (see clause 11), and
– cabinet radiation (see 9.9).
The measured levels may be due to the radiation from the antenna, audio lines, control lines,
power mains or from the cabinet. These measurements generally require the use of a test
site or an RFCD. Guides for the use of such test sites and RFCDs are given in IEC 60489-1,
annex A.
9.2 Average radiated carrier power for transmitters with integral antennas
9.2.1 Definition
Average of the radiated carrier powers in eight directions distributed at 45° angles in the
horizontal plane.
NOTE – The average radiated carrier power can be measured in OATS (open area test sites) or in LRTS (low
reflection test sites) or in AC (anechoic chambers). Measured values in OATS may differ from the values measured
in the other two test sites because of the ground reflected wave effect.
9.2.2 Method of measurement
a) Choose the test site and the measuring distance suitable for the frequency, the environmental
conditions, the required measurement error and transmitter dimensions, from those
described in annex A of IEC 60489-1.
b) Place the equipment under test as illustrated in a subclause for the chosen test site in the
above-mentioned annex.
c) Measure the normal direction radiated power by the basic measuring procedure described
in the subclause.
NOTE – The normal direction of the equipment under test is usually the operation side and is specified by the
manufacturer. The normal direction may be the specific direction used for RFCD calibration measurements.
d) Rotate the equipment under test 45° clockwise and measure this direction radiated power
by the same procedure as in step c).
e) Repeat step d) until values have been obtained for eight azimuth positions.
9.2.3 Presentation of results
Calculate the average of eight values measured in step d). Record measurement conditions of
the test site.
9.3 Maximum effective radiated carrier power
9.3.1 Maximum effective radiated carrier power in the horizontal plane
9.3.1.1 Definition
Maximum effective radiated carrier power in the horizontal plane.
NOTE – The maximum radiated carrier power can be measured in OATS, LRTS or AC. Measured values in OATS
may differ from the values measured in the other two test sites because of the ground reflected wave effect.

– 6 – 60489-2 Amend. 1  IEC:1999(E)
9.3.1.2 Method of measurement for the maximum effective radiated carrier power
in the horizontal plane
a) Choose the test site and the measuring distance suitable for the frequency, the environmental
conditions, the required measurement error and transmitter dimensions, from those
described in annex A of IEC 60489-1.
b) Place the transmitter under test as illustrated in a subclause for the chosen test site in the
above-mentioned annex. Calibrate the test site.
c) Measure the normal direction radiated power by the basic measuring procedure for
radiation measurement described in the above-mentioned subclause.
NOTE – The normal direction of the equipment under test is usually the operation side and is specified by the
manufacturer. The normal direction may be the specific direction used for RFCD calibration measurements.
d) Rotate the transmitter under test in the horizontal plane and find the direction which has the
maximum indication on the power measuring device. Note the maximum indication.
9.3.1.3 Presentation of results
Calculate the maximum effective radiated carrier power in the horizontal plane and record the
direction in step d).
9.3.2 Maximum effective radiated carrier power on a spherical surface
9.3.2.1 Definition
Maximum value of effective radiated carrier power observed on a closed surface surrounding
an antenna.
NOTE – The maximum radiated carrier power can be measured in LRTS or in AC.
9.3.2.2 Method of measurement for the maximum effective radiated carrier power
on a spherical surface
Follow the procedure described in items a) to c) of 9.3.1.2.
d) Rotate the transmitter under test in the horizontal plane and find the direction which has the
maximum indication on the selective measuring device.
e) Rotate the transmitter under test 90° in the vertical plane keeping the direction found in
step d) to the measuring antenna.
f) Orient the measuring antenna so that it is horizontally polarized. Rotate the transmitter
under test in the horizontal plane and note the maximum indication. This will be the
direction which has the maximum radiated carrier power on a spherical surface.
g) If another direction offers more radiated carrier power, confirm it for that direction by
repeating step d) to step f).
9.3.2.3 Presentation of results
Calculate the maximum effective radiated carrier power in step f) and record the direction in
step d) as the horizontal plane direction and the direction in step f) as the vertical plane
direction.
9.4 RFM (random field measurement) radiated carrier power
9.4.1 Definition
Median of radiated carrier power measurements taken along a random path in a random field.
NOTE – The RFM radiated carrier power can be measured in the RFM site.

60489-2 Amend. 1 © IEC:1999(E) – 7 –
9.4.2 Method of measurement
a) Confirm the construction parameter of the RFM site and position the transmitter under test
as illustrated in annex A of IEC 60489-1.
b) Measure the RFM radiated carrier power by the basic measuring procedure described in the
above-mentioned annex.
9.4.3 Presentation of results
Record the RFM radiated carrier power, the path length and the DDD value measured in step b).
NOTE – The DDD value expresses the measuring error or repeatability in the test site evaluation measurement
described in the above-mentioned annex.
9.5 RFCD (radio-frequency coupling device) radiated carrier power
9.5.1 Definition
Signal level at the output of an RFCD, in which the transmitter under test operates, calibrated
by the specific direction radiated carrier power in a test site.
9.5.2 Method of measurement
a) Choose the RFCD for the frequency and size of the transmitter under test from those
described in annex A of IEC 60489-1.
b) Calibrate or confirm the calibration value for the output signal level of the RFCD. The
calibration should be performed with the calibration method for the chosen RFCD described
in the subclause of the above-mentioned annex.
c) Place the transmitter under test in the specified position and in the specified direction and
activate the transmitter.
d) Measure the output level of the RFCD.
9.5.3 Presentation of results
Calculate the RFCD radiated carrier power from the relation of the values in step b) and
step d). Record the position, the direction of the transmitter under test in the RFCD, and the
calibration value.
9.6 Radiated spurious narrow-bandwidth components
The methods of measurement for the radiated spurious narrow-bandwidth components are
principally the same as those of the radiated carrier power described in 9.2 to 9.5. The only
difference for radiated spurious measurement is the presence of a very high-level carrier.
Therefore, the measurement conditions are the same as the combination of the above radiated
carrier power measurement and the measurement of the terminal spurious narrow-bandwidth
radio-frequency components in 8.3.
The different kinds of radiated spurious narrow-bandwidth components are as follows:
– average radiated spurious narrow-bandwidth components;
– maximum radiated spurious narrow-bandwidth components;
– RFM radiated spurious narrow-bandwidth components;
– RFCD radiated spurious narrow-bandwidth components.
9.7 Radiated spurious transmitter noise
9.7.1 Definition
Continuous spectrum of noise components radiated by transmitters with integral antennas.
NOTE – For more general information, see 8.4.1.

– 8 – 60489-2 Amend. 1  IEC:1999(E)
9.7.2 Method of measurement
This method uses the RFCD or near-field coupling of the transmitter and the test antenna in
the Faraday cage (if necessary) and the output of the RFCD, or the test antenna is measured
with the same method as for one of the terminal radio-frequency powers, for example 8.4. The
method uses the ratio measurement, and the coupling of the RFCD or the coupling of the
transmitter and the test antenna is calculated from the radiated carrier power measured as
described in 9.2.
9.8 Radiated adjacent channel power
9.8.1 Definition
That part of
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