ISO 20860-2:2009

INTERNATIONAL ISO
STANDARD 20860-2
First edition
2009-03-01
Road vehicles — 50 Ω impedance radio
frequency connection system interface —
Part 2:
Test procedures
Véhicules routiers — Interface de système de connexion de
radiofréquence d'une impédance de 50 Ω —
Partie 2: Méthodes d'essai
Reference number
©
ISO 2009
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©  ISO 2009
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ii © ISO 2009 – All rights reserved

Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions. 1
3.2 Abbreviated terms . 2
4 Principle. 2
5 Preparation of the test samples . 2
5.1 Dimensional characteristics . 2
5.2 Material characteristics. 2
5.3 Making of the test samples. 3
5.4 Quality test of the test samples. 3
5.5 Documentation of the test samples . 3
6 Visual inspection . 3
6.1 Purpose. 3
6.2 Apparatus . 3
6.3 Test samples . 3
6.4 Reference samples . 3
6.5 Procedure . 3
6.6 Requirements . 4
7 Connector electrical tests. 4
7.1 General. 4
7.2 Contact resistance. 4
7.3 Insulation resistance . 5
7.4 Dielectric withstand voltage . 5
7.5 Return loss (VSWR). 6
7.6 Insertion loss. 7
7.7 RF leakage (screening effectiveness). 8
8 Connector mechanical tests. 9
8.1 Gauge mechanical pull test . 9
8.2 Connector-connector mating/unmating force . 10
8.3 Polarization and coding feature effectiveness . 10
8.4 Mechanical pull test. 11
9 Environmental tests. 13
9.1 Vibration/mechanical shock . 13
9.2 Thermal shock. 15
9.3 Temperature/humidity cycling. 16
9.4 High temperature exposure . 18
10 Test sequence plans. 19
Bibliography . 21

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20860-2 was prepared by Technical Committee ISO/TC 22, Road vehicles.
ISO 20860 consists of the following parts, under the general title Road vehicles — 50 Ω impedance radio
frequency connection system interface:
⎯ Part 1: Dimensions and electrical requirements
⎯ Part 2: Test procedures
iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 20860-2:2009(E)

Road vehicles — 50 Ω impedance radio frequency connection
system interface —
Part 2:
Test procedures
1 Scope
This part of ISO 20860 specifies the tests for male and female connectors of the 50 Ω impedance interface for
radio frequency applications in road vehicles, and ensures communication to and within road vehicles.
These tests apply to all coaxial connectors for road vehicles with a 50 Ω radio frequency interface in
accordance with ISO 20860-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO/TS 16949, Quality management systems — Particular requirements for the application of ISO 9001:2000
for automotive production and relevant service part organizations
ISO 20860-1, Road vehicles — 50 Ω impedance radio frequency connection system interface — Part 1:
Dimensions and electrical requirements
IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-27, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60169-10, Radio-frequency connectors — Part 10: R.F. coaxial connectors with inner diameter of outer
conductor 3 mm (0,12 in) with snap-on coupling — Characteristic impedence 50 ohms (Type SMB)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20860-1 and the following apply.
3.1.1
adapter “Adap 1”
Adap 1
apparatus consisting of a male ISO 20860-1 connector, mateable with a female ISO 20860-1 connector and
on the other side with an SMA female connector
3.1.2
adapter “Adap 2”
Adap 2
apparatus consisting of a female ISO 20860-1 connector, mateable with a male ISO 20860-1 connector and
on the other side with an SMA female connector
3.2 Abbreviated terms
CT/A continuity totalizer/analyzer
NWA network analyzer
PC printed circuit
RF radio frequency
SMA subminiature version A
VSWR voltage standing wave ratio
4 Principle
Connectors in accordance with ISO 20860-1 need to be tested as one unit consisting of connector and cable.
The cable itself and the quality of the application to the connector can impact the test results. Therefore, only
those cables approved by the vehicle manufacturer and those tools and processes recommended by the
connector manufacturer shall be used for the preparation of the test samples. These tools and processes
should be as similar as possible to those used for the series production. This instruction shall be applied to PC
boards as appropriate, in the case of testing board mount connectors.
The test procedures are not intended to test the samples beyond their limits of resilience. After the tests, the
samples shall not show any damage due to the excessive loads applied.
The condition of the test samples shall be the same as in regular production. The test samples shall not be
specially prepared for the test procedures, apart from as specified in this part of ISO 20860.
The test procedures are planned in such a way that the test samples shall pass through one test sequence. If
the vehicle manufacturer so requests, the test samples may be used for several test sequences. All individual
requirements shall be fulfilled in that case as well.
All test results, laboratory reports and calibration records shall be stored in a central file. Such storage shall be
in accordance with established ISO/TS 16949 requirements.
5 Preparation of the test samples
5.1 Dimensional characteristics
The part construction of the test samples shall conform to the dimensions, shape and detail attributes
specified in ISO 20860-1 and as defined in the latest revision of the manufacturer's applicable part drawing(s).
5.2 Material characteristics
All material used in each test sample shall conform to the specifications in ISO 20860-1 and as defined in the
latest revision of the manufacturer's applicable part drawing(s).
2 © ISO 2009 – All rights reserved

5.3 Making of the test samples
The quantity and details relative to making the test cable assemblies are given in the corresponding test
procedures. The length of the cable assembly is the distance between the two reference planes as defined in
ISO 20860-1, with an accuracy of ± 3 mm. The test samples shall be marked so that they can be identified
individually during and after completion of each test sequence.
5.4 Quality test of the test samples
All dimensions specified in ISO 20860-1 shall be tested by adequate means. It shall be ensured that the
centre contact and the outer contact of the samples are continuously conductive.
NOTE For proof of conductivity, flexible contact parts can be touched, but it is advisable not to exp
...