EN 60315-9:1996
(Main)Methods of measurement on radio receivers for various classes of emission - Part 9: Measurement of the characteristics relevant to radio data system (RDS) reception
Methods of measurement on radio receivers for various classes of emission - Part 9: Measurement of the characteristics relevant to radio data system (RDS) reception
Specifies the conditions, characteristics and methods of measurement to be used to determine the RDS reception characteristics of a sound-broadcasting receiver, so as to make possible the comparison of results of measurements made by different observers.
Meßverfahren für Funkempfänger für verschiedene Sendearten - Teil 9: Messungen von auf RDS(Radio-Daten-System)-Empfang bezogenen Eigenschaften
Méthodes de mesure applicables aux récepteurs radioélectriques pour diverses classes d'émission - Partie 9: Méthodes de mesure des caractéristiques relatives à la réception du système de radiodiffusion de données (RDS)
Spécifie les conditions, caractéristiques et méthodes de mesure à utiliser pour déterminer les caractéristiques de réception RDS d'un récepteur de radiodiffusion sonore, afin de pouvoir comparer des résultats des mesures réalisées par différents observateurs.
Methods of measurement on radio receivers for various classes of emission -- Part 9: Measurement of the characteristics relevant to radio data system (RDS) reception (IEC 60315-9:1996)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-1999
Methods of measurement on radio receivers for various classes of emission -- Part
9: Measurement of the characteristics relevant to radio data system (RDS)
reception (IEC 60315-9:1996)
Methods of measurement on radio receivers for various classes of emission -- Part 9:
Measurement of the characteristics relevant to radio data system (RDS) reception
Meßverfahren für Funkempfänger für verschiedene Sendearten -- Teil 9: Messungen von
auf RDS(Radio-Daten-System)-Empfang bezogenen Eigenschaften
Méthodes de mesure applicables aux récepteurs radioélectriques pour diverses classes
d'émission -- Partie 9: Méthodes de mesure des caractéristiques relatives à la réception
du système de radiodiffusion de données (RDS)
Ta slovenski standard je istoveten z: EN 60315-9:1996
ICS:
33.160.20 Radijski sprejemniki Radio receivers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME
CEI
INTERNATIONALE
IEC
315-9
INTERNATIONAL
Première édition
STANDARD
First edition
1996-05
Méthodes de mesure applicables
aux récepteurs radioélectriques pour
diverses classes d'émission —
Partie 9:
Méthodes de mesure des caractéristiques
relatives à la réception du système
de radiodiffusion de données (RDS)
Methods of measurement on radio
receivers for various classes of emission —
Part 9:
Measurement of the characteristics relevant
to radio data system (RDS) reception
© CEI 1996 Droits de reproduction réservés —Copyright - all rights reserved
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315-9 ©IEC:1996 – 3 –
CONTENTS
Page
FOREWORD 5
Clause
1 General 7
2 General notes on measurements 9
3 Characteristics and methods of measurement 11
Annexes
A The radio broadcast data system 27
B Bibliography 29
315-9 ©IEC:1996 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHODS OF MEASUREMENT ON RADIO RECEIVERS FOR
VARIOUS CLASSES OF EMISSION —
Part 9:
Measurement of the characteristics relevant to
radio data system (RDS) reception
FOREWORD
1)
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and electronic
fields. To this end and in addition to other activities, the IEC publishes International Standards. Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt
with may participate in this preparatory work. International, governmental and non-governmental organizations
liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2)
The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3)
The documents produced have the form of recommendations for international use and are published in the
form of standards, technical repo rts or guides and they are accepted by the National Committees in that
sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5)
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6)
Attention is drawn to the possibility that some of the elements of this International Standard may be the
subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 315-9 has been prepared by subcommittee 100A (former 12A):
Receiving equipment, of IEC technical committee 100: Audio, video and multimedia systems
and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
100A/2/FDIS 1 00A/1 4/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
Annexes A and B are for information only.
This part of IEC 315 is to be used in conjunction with IEC 315-1 and IEC 315-4.
315-9 © IEC:1996 – 7 –
METHODS OF MEASUREMENT ON RADIO RECEIVERS FOR
VARIOUS CLASSES OF EMISSION —
Part 9: Measurement of the characteristics relevant to
radio data system (RDS) reception
1 General
1.1 Scope
This part of IEC 315 specifies the conditions, characteristics and methods of measurement to
be used to determine the RDS reception characteristics of a sound-broadcasting receiver, so
as to make possible the comparison of results of measurements made by different observers.
Performance requirements (limit values for the characteristics required for acceptable RDS
performance) are not specified. The methods of measurement are conceived for determining
the overall performance of the receiver, without attempting to study its functional units
separately.
1.2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this pa rt
of IEC 315. At the time of publication, the editions indicated were valid.
All standards are subject to revision, and parties to agreements based on this part of IEC 315
are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
IEC 315-1: 1988,
Methods of measurement on radio receivers for various classes of emission –
Part 1: General considerations and methods of measurement, including audio-frequency
measurements
IEC 315-4: 1982,
Methods of measurement on radio receivers for various classes of emission –
Part 4: Radio-frequency measurements on receivers for frequency modulated sound-
broadcasting emissions
CISPR 16-1: 1993,
Specification for radio disturbance and immunity measuring apparatus and
methods – Part
1: Radio disturbance and immunity measuring apparatus
1.3 Definitions
The "characteristics to be specified" are defined in their relevant clauses. This avoids the need
for cross-references when reading the text. For the purposes of this pa
rt of IEC 315, the
following definition applies:
1.3.1 satisfactory reception:
The correct display of the programme service name (PS)
within 10 s after the beginning of the relevant step of a test.
NOTES
1 Any eight characters from the available character set may be chosen as the programme service name. The
chosen name(s) should be stated with the results.
2 The correct display of the programme service name is used as the criterion for satisfactory reception,
because this application is generally available on RDS receivers, and can be used without making internal
connections to the receiver circuits.
3 If the PS is not available (on a special purpose receiver, for example), another, stated, criterion may be
used. In this case, it may be necessary to make internal connections to the receiver in order to obtain a suitable
output signal for measurement. If possible, a correlation should be established between this criterion and the PS
criterion, and stated with the results.
315-9 ©IEC:1996 – 9 –
2 General notes on measurements
2.1 Preliminary measurements
As the results of various measurements described in this part may be influenced by other
properties of the receiver, the related measurements given in IEC 315-1 and IEC 315-4 should
be carried out first.
2.2 Standard signals
Unless otherwise specified, the following standard signals shall be used for the measurements:
2.2.1 Standard measuring signal
– Standard radio-frequency (r.f.) input signal level: 70 dB(fW)
– Standard carrier frequency: 69 MHz, 83 MHz or 98 MHz,
(depending on the tuning range of the receiver,
see IEC 315-4, table 1)
– Stereophonic signal without audio modulation
– Frequency deviation of 19 kHz pilot tone: ±6,75 kHz
or in accordance with the broadcasting system standards
for which the receiver is designed
– Frequency deviation of RDS signal: ±1,20 kHz
– Phase relation to the third harmonic of the pilot tone: 0° ± 1°
– Repetition rate for RDS group type OA: approximately 4/s
2.2.2 Standard measuring signal with AR/ (see note 2)
When it is required to carry out measurements in the presence of an ARI signal, the following
requirements apply, in addition to those in 2.2.1.
– Frequency deviation of ARI signal (carrier only): ±3,50 kHz
– ARI area identification: A
– ARI traffic announcement identification: off
– Phase relation between ARI and RDS subcarriers: 90° ± 1°
– Phase relation between ARI signal and the third harmonic
of the pilot-tone: 0° ± 1°
NOTES
1 Unless otherwise stated, the receiver is tuned to the standard measuring frequency nearest the centre of
the broadcast band for which the receiver is designed (see IEC 315-4, table 1).
2 ARI is the Autofahrer-Rundfunk-Information (broadcast information for motorists), a traffic information
system used in some countries, and which can be broadcast simultaneously with the RDS system from the
same transmitters.
315-9 © IEC:1996 – 11 –
2.3 RDS data conditions
The RDS data shall consist of an appropriate PI code, a PS name, two AF values and default
values (see annex B, references [1] and [2]) for TP, DI, TA, PTY and M/S, with a maximum
repetition rate for group type OA of four groups per second.
2.4
Standard conditions for measurements
These shall be taken from IEC 315-1 and IEC 315-4. If the receiver has a "regionalization
mode", this shall be switched off. Except where stated, the alternative frequency (AF) mode
shall be switched off.
3 Characteristics and methods of measurement
3.1 RDS sensitivity
3.1.1 Characteristic to be specified
The lowest radio-frequency input signal level for which satisfactory reception (see 1.3.1) is
obtained.
3.1.2 Method of measurement
a) The receiver and the signal source are operated under standard measuring conditions,
according to 2.2, and the correct display of the programme se rvice name is checked.
b) The radio-frequency input signal is switched off, and a new programme service name is
set into the RDS encoder. The new programme se rvice name shall differ from the previous
one in all eight characters.
c)
The radio-frequency input level is then reduced to a lower value, for which a correct
display is not expected, and then switched on again.
d) If satisfactory reception with the new programme service name is not achieved, the
whole sequence is repeated from step b), using a higher radio-frequency input level in
step c).
NOTE — It is necessary to repeat all the steps, because the receiver may have stored pa rts of the second
programme service name correctly at the low input signal level.
e)
This process is repeated up to the radio-frequency input signal level at which
satisfactory reception is achieved, and this level is noted.
f) If required, the measurement may be repeated with an ARI signal present, using the
standard signal specified in 2.2.2.
3.1.3 Presentation of results
The lowest radio-frequency input signal level(s) determined according to steps e) and f) of
3.1.2 shall be stated as RDS sensitivities, in dB(fW).
3.2 RDS deviation sensitivity
3.2.1 Characteristic to be specified
The lowest value of deviation of the main carrier of the radio-frequency input signal by the RDS
subcarrier for which satisfactory reception is achieved.
315-9©IEC:1996 _13_
3.2.2 Method of measurement
a)
The receiver and the signal source are operated under standard measuring conditions
according to 2.2, and the correct display of the programme service name is checked.
b)
The radio-frequency input signal is switched off, and a new programme service name is
set into the RDS encoder. The new programme service name shall differ from the previous
one in all eight characters.
c)
The RDS frequency deviation is then reduced below the standard value and the radio-
frequency input signal is switched on again.
d)
If satisfactory reception is achieved, the measurement steps a) to d) are repeated with
reduced RDS frequency deviation in each cycle until satisfactory reception is not achieved.
The measurement shall be carried out down to an RDS frequency deviation of ±0,5 kHz.
NOTE — Care should be taken that the lowest value of deviation is not restricted by a receiver design which
applies a deviation-dependent RDS threshold and thus prevents the measurement of deviation sensitivity below
a certain receiver-dependent val
...
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