Road vehicles — Electrical disturbances by narrowband radiated electromagnetic energy — Component test methods — Part 7: Direct radio frequency (RF) power injection

Specifies direct RF power injection tests for electromagnetic immunity of electronic components of passenger cars and commercial vehicles, regardless of the propulsion system. The electromagnetic disturbance considered is limited to continuous narrowband electromagnetic fields.

Véhicules routiers — Perturbations électriques par rayonnement d'énergie électromagnétique à bande étroite — Méthodes d'essai des composants — Partie 7: Injection directe de puissance à fréquence

General Information

Status
Withdrawn
Publication Date
22-Nov-1995
Withdrawal Date
22-Nov-1995
Technical Committee
Drafting Committee
Current Stage
9599 - Withdrawal of International Standard
Start Date
27-Nov-2003
Completion Date
27-Nov-2003
Ref Project

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ISO 11452-7:1995 - Road vehicles -- Electrical disturbances by narrowband radiated electromagnetic energy -- Component test methods
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Standards Content (sample)

Is0
INTERNATIONAL
11452-7
STANDARD
First edition
1995-l Z-01
Road vehicles - Electrical disturbances
by narrowband radiated electromagnetic
- Component test methods -
energy
Part 7:
Direct radio frequency (RF) power injection
V6hicules routiers - Perturbations Glectriques par rayonnement d’8nergie
6lectromagn6 tique en bande 6troite - R/l6 thodes d’essai d’un
composan t -
Partie 7: Injection directe de puissance ;i fkquence radio (FR)
Reference number
IS0 11452-7:1995(E)
---------------------- Page: 1 ----------------------
IS0 114!%7:'8995q:E)
Contents
Page

1 Scope ..............................................................................................

.....................................................................
2 Normative references
..........................................................................
3 Test conditions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Test temperature and supply voltage

3.2 Frequency range .....................................................................

..............................................................................
3.3 Modulation

3.4 Dwell time ..............................................................................

3.5 Frequency step sizes ..............................................................

.................................................................
3.6 Test severity levels
.......................... 2
4 Test instrument description and specification

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Power injection system
......................................................................
4.2 Instrumentation
..............................................................................
4.3 Test set-up

5 Test procedure ..........................................................................

5.1 Test plan .................................................................................

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Test method

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Test report
Annexes
............................................ 5
A Test set-up calibration procedure
....... 6
B Broadband artificial network (BAN) design requirements
................ 8
C Function Performance Status Classification (FPSC)
0 IS0 1995

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced

or utilized in any form or by any means, electronic or mechanical, including photocopying and

microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-I 211 Geneve 20 0 Switzerland
Printed in Switzerland
---------------------- Page: 2 ----------------------
@a IS0 IS0 11452=7:1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 11452-7 was prepared by Technical Committee
ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic
equipment.
IS0 11452 consists of the following parts, under the general title Road
vehicles - Electrical disturbances by narrowband radiated electro-
magnetic energy - Component test methods:
- Part 1: General and definitions
- Part 2: Absorber-lined chamber
- Part 3: Transverse electromagnetic mode (TEM) cell
- Part 4: Bulk current injection (BCI)
- Part 5: Stripline
- Part 6: Parallel plate antenna
- Part 7: Direct radio frequency (RF) power injection
Annex A forms an integral part of this part of IS0 11452. Annexes B and
C are for information only.
---------------------- Page: 3 ----------------------
This page intentionally left blank
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD 0 IS0 IS0 11452=7:1995(E)
Road vehicles - Electrical disturbances
by narrowband radiated electromagnetic energy -
Component test methods -
Part 7:
Direct radio frequency (RF) power iniection
IEC and IS0 maintain registers of currently valid
1 Scope
International Standards.
This part of IS0 11452 specifies direct RF power in-
IS0 7637-l : 1990, Road vehicles - Electrical disturb-
jection tests for electromagnetic immunity of elec-
ance by conduction and coupling - Part 1: Passenger
tronic components of passenger cars and commercial
‘cars and light cominercial vehicles with nominal 12 V
vehicles, regardless of the propulsion system (e.g.
supply voltage - Electrical transient conduction along
spark-ignition engine, diesel engine, electric motor).
supply lines only.
The electromagnetic disturbance considered in this
part of IS0 11452 is limited to continuous narrowband
IS0 7637-2:1990, Road vehicles - Electrical disturb-
elfectromagnetic fields.
ance by conduction and coupling - Part 2: Commer-
cial vehicles with nominal 24 V supply voltage -
I’mmunity mea~surements of complete vehicles are
Electrical transient conduction along supply lines
general:ly onsly; possible by the vehicle manufacturer,
only.
because,I for exam:pfe, off the high costs of an
absorber-lined’ room:, preserving the secrecy of proto-
IS0 11452-I :I 995, Road vehicles - Electrical dis-
types or the large number of different vehicle models.
turbances by narrowband radiated electromagnetic
Therefore, for research, development and quality
energy - Component test methods - Part 1: Gen-
control, a laboratory measuring method is used by the
eral and definitions.
manufacturer.
IS0 11452-l specifies general test methods, defi-
nitions, practical use and basic principles of the test 3 Test conditions
procedure.
3.1 Test temperature and supply voltage
2 Normative references
The ambient temperature during the test shall be
(23 + 5) “C.
The following standards contain provisions which,
through reference in this text, constitute provisions
The supply voltage during the test shall be
of this part of IS0 11452. At the time of publication,
(13,5 + 0,5) V for 12 V electrical systems and
the editions indicated were valid. All standards are
(27 +i) V for 24 V electrical systems.
subject to revision, and parties to agreements based

on this part of IS0 11452 are encouraged to investi- If other values are agreed to by the users of this part

gate the possibility of applying the most recent edi- of IS0 11452, the values shall be documented in the

tions of the standards indicated below. Members of test report.
---------------------- Page: 5 ----------------------
0 IS0
IS0 11452=7:1995(E)
3.6 Test severity levels
3.2 Frequency range
The upper limit of the test is limited by resonances in
The user should specify the test severity levels over
the broadband artificial network (BAN). By using an
the frequency range. Suggested severity levels are
appropriate BAN, a useful frequency range of
included in annex C.
0,25 MHz to 400 MHz can readily be achieved.
These test severity levels are expressed in terms of
the equivalent root-mean-square value of the un-
3.3 Modulation
modulated wave.
The test determines the type and frequency of the
The power level is measured at the output of the
modulation. If no values are agreed between the
10 dB attenuator in figure 1.
users of this part of IS0 11452, the following shall be
used:
- no modulation (CW)
4 Test instrument description and
specification
- 1 kHz sine-wave amplitude modulation (AM) of
80 %
4.1 Power injection system
3.4 Dwell time
Direct RF power injection is a technique which
At each frequency, the device under test shall be ex-
couples quantifiable RF power into the operating de-
posed to the test level for the minimum response
vice under test, while eliminating variables related to
time needed to control it. In all cases, this minimum
wiring harness l
...

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