IEC 61753-031-2:2014

Fibre optic interconnecting devices and passive components - Performance standard - Part 031-2: Non-connectorized single-mode 1 × N and 2 × N non-wavelength-selective branching devices for Category C - Controlled environment

IEC 61753-031-2:2014 contains the minimum initial tests and measurement requirements and severities which a non-wavelength selective branching device (NWBD) should satisfy in order to be categorized as meeting the requirement of this IEC standard. The requirements cover balanced bidirectional non-connectorized single-mode 1 x N and 2 x N non wavelength-selective branching devices for use in an IEC Category C environment (N is the number of branching ports), especially but not exclusively used for PON application. For balanced NWBD two attenuation and uniformity performance classes are considered:
- class A (premium class) which meets more restrictive requirements (i.e. for extended reach PON application) and
- class B (standard class) for standard application (i.e. normal reach PON application). The requirements also cover unbalanced bidirectional non-connectorized single-mode, non-wavelength-selective branching devices; however, the specifications of unbalanced branching devices are limited to 1 x 2 and 2 x 2 devices because they are the most commonly used. Keywords: non-wavelength selective branching device (NWBD), IEC Category C environment

Dispositifs d'interconnexion et composants passifs à fibres optiques - Norme de performance - Partie 031-2: Dispositifs de couplage indépendants de la longueur d'onde 1 x N et 2 x N en unimodal, non-connectorisés, pour catégorie C - Environnement contrôlé

L'IEC 61753-031-2:2014 contient les exigences et les sévérités initiales minimales d'essais et de mesures auxquelles il convient qu'un dispositif de couplage indépendant de la longueur d'onde (NWBD) satisfasse afin d'être classé comme conforme aux exigences de la présente norme IEC.Ces exigences couvrent les dispositifs de couplage indépendants de la longueur d'onde 1 x N et 2 x N en unimodal, non connectorisés, bidirectionnels symétriques destinés à être utilisés dans un environnement de catégorie C selon l'IEC (N correspond au nombre de ports pouvant être connectés), utilisés en particulier, mais pas de manière exclusive, pour les applications PON. Dans le cas des NWBD symétriques, deux classes d'affaiblissement et d'uniformité sont prises en compte:
- La classe A (classe de première qualité) qui satisfait aux exigences les plus restrictives (à savoir pour les applications PON de portée étendue) et
- la classe B (classe normale) pour les applications normales (à savoir les applications PON de portée normale). Ces exigences couvrent aussi les dispositifs de couplage indépendants de la longueur d'onde en unimodal non-connectorisés bidirectionnels asymétriques; toutefois les spécifications des dispositifs de couplage asymétriques sont limitées aux dispositifs 1 x 2 et 2 x 2 car ce sont eux qui sont les plus couramment utilisés. Mots clés: dispositif de couplage indépendant de la longueur d'onde (NWBD), environnement de catégorie C selon l'IEC

General Information

• Status: Published
• Publication Date: 02-Sep-2014
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 7 - TC 86/SC 86B/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 03-Sep-2014
• Completion Date: 15-Sep-2014

Overview

IEC 61753-031-2:2014 is an International Electrotechnical Commission performance standard for non-connectorized single‑mode non‑wavelength‑selective branching devices (NWBD) intended for an IEC Category C (Controlled) environment. It defines the minimum initial tests, measurement requirements and severities that 1 × N and 2 × N balanced bidirectional NWBD (and common 1 × 2 / 2 × 2 unbalanced devices) must meet to be classified under this standard. The document is especially relevant to passive optical network (PON) deployments where non-wavelength‑selective passive splitting/branching is used.

Key technical topics and requirements

• Device scope: Non‑connectorized single‑mode 1×N and 2×N balanced bidirectional NWBDs; unbalanced bidirectional devices limited to 1×2 and 2×2.
• Performance classes: Two attenuation/uniformity classes:
  • Class A (premium) - stricter limits for extended‑reach PON.
  • Class B (standard) - for typical reach PON.
• Optical performance: Detailed requirements for attenuation (insertion loss) and uniformity with numerical limits provided by formulas (examples in the standard include expressions such as ≤ 0.5 + 3.3·log N dB, varying by spectral band and class).
• Spectral bands: Tests cover standard single‑mode bands, e.g. 1260–1360 nm and 1480–1625/1660 nm combinations as specified.
• Test methods: All test methods are taken from the IEC 61300 series (vibration, shock, cold, dry heat, damp heat, change of temperature, high optical power, return loss, directivity, etc.).
• Sample preparation: Samples are to be terminated on single‑mode fibres per IEC 60793‑2‑50 categories (B1.1, B1.3 or B1.6) in coated or reinforced cable format.
• Reporting & sample size: Requires fully documented test reports and defines sample sizes (Annex B) and tabulated attenuation/uniformity examples (Annex A).

Practical applications and users

Who uses IEC 61753‑031‑2:

• NWBD manufacturers - to design and verify products for controlled‑environment deployment and to classify devices as Class A or B.
• Test laboratories and QA teams - to perform standardized environmental and optical measurements per IEC 61300 methods.
• Network engineers and specifiers - when selecting splitters/branching devices for PON and other passive optical architectures.
• Procurement and certification bodies - to evaluate compliance and acceptance criteria for controlled‑environment passive components.

Related standards

• IEC 61300 series (basic test and measurement procedures)
• IEC 61300‑3‑6, ‑3‑7, ‑3‑20, etc. (return loss, wavelength dependence, directivity)
• IEC 60793‑2‑50 (single‑mode fibre product specifications)

Keywords: IEC 61753‑031‑2:2014, non‑wavelength selective branching device, NWBD, IEC Category C environment, 1×N 2×N, non‑connectorized single‑mode, PON.

Standards Content (Sample)

IEC 61753-031-2 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Performance
standard –
Part 031-2: Non-connectorized single-mode 1×N and 2×N non-wavelength-
selective branching devices for Category C – Controlled environment

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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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IEC Central Office Tel.: [phone]
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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IEC 61753-031-2 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Performance

standard –
Part 031-2: Non-connectorized single-mode 1×N and 2×N non-wavelength-

selective branching devices for Category C – Controlled environment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
R
ICS 33.180.20 ISBN 978-2-8322-1818-1

– 2 – IEC 61753-031-2:2014 © IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Test . 6
4 Test report . 7
5 Performance requirements . 7
5.1 Dimensions . 7
5.2 Sample size . 7
5.3 Test details and requirements . 7
Annex A (normative) A and U requirements of 1 × N and 2 × N NWBDs . 14
A.1 Attenuation and uniformity requirements of 1 × N and 2 × N NWBDs
calculated by the equations of Tests No.1 and 2 . 14
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD . 15
Annex B (normative) Sample size . 17
Bibliography . 18

Table 1 – Test details and requirements (1 of 6) . 8
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1 . 14
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in Tests 1 and 2 of Table 1 . 15
Table A.3 – Attenuation requirements of 1 × 2 and 2 × 2 unbalanced NWBD having the
most common port configurations, with the underlying formula as specified in Test 1 of
Table 1 . 15
Table A.4 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 16
Table A.5 – Minimum requirements at room temperature of attenuation values for

Class B balanced bidirectional NWBD . 16
Table B.1 – Sample size for each test . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-2: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category C –
Controlled environment
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61753-031-2 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3791/FDIS 86B/3823/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.

– 4 – IEC 61753-031-2:2014 © IEC 2014
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61753 consists of the following parts, under the general title Fibre optic interconnecting
devices and passive components – Performance standard:
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-2: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category C –
Controlled environment
1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirement of this IEC standard.
The requirements cover balanced bidirectional non-connectorized single-mode 1 × N and
2 × N non wavelength-selective branching devices for use in an IEC Category C environment
(N is the number of branching ports), especially but not exclusively used for PON application.
For balanced NWBD two attenuation and uniformity performance classes are considered:
class A (premium class) which meets more restrictive requirements (i.e. for extended reach
PON application) and class B (standard class) for standard application (i.e. normal reach PON
application).
The requirements also cover unbalanced bidirectional non-connectorized single-mode, non-
wavelength-selective branching devices; however, the specifications of unbalanced branching
devices are limited to 1 × 2 and 2 × 2 devices because they are the most commonly used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-2-50:2012, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – High optical power
IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-17: Tests – Cold

– 6 – IEC 61753-031-2:2014 © IEC 2014
IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance
IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-22: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-3-2:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-2: Examination and measurements – Polarization
dependent loss in a single-mode fibre optic device
IEC 61300-3-3:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-3: Examinations and measurements – Active
monitoring of changes in attenuation and return loss
IEC 61300-3-6:2008, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components
IEC 61300-3-20, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-20: Examinations and measurements – Directivity of
fibre optic branching devices
IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-28: Examinations and measurements – Transient loss
3 Test
All test methods are selected within the IEC 61300 series.
The samples for tests shall be terminated onto single-mode fibres according to category B1.1,
B1.3, or B.6 of IEC 60793-2-50:2012 in either coated fibres (primary and secondary) or
reinforced cable format.
All tests shall be carried out to validate performance over one of the spectral bands listed
below:
1) Spectral bands I:
– 1 260 nm to 1 360 nm
– 1 480 nm to 1 625 nm
2) Spectral bands II:
– 1 260 nm to 1 360 nm
– 1 480 nm to 1 660 nm
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests have been carried out and complied with.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with those given in appropriate manufacturer’s drawings.
5.2 Sample size
Sample sizes for the tests are defined in Annex B.
5.3 Test details and requirements
Performance requirements and details are specified in Table 1.
All optical performances are given only for non-connectorized NWBD. During the
environmental tests where monitoring of the NWBD is needed, all ports of the device shall be
monitored.
In Annex A some numerical values of attenuation and uniformity requirements of Tests No.1
and 2 for the most commonly used NWBD are shown in Tables A.1, A.2 and A.3.
In Tables A.4 and A.5 the minimum attenuation requirements at room temperature are
described by way of equations on the top of column, with the calculated values of the most
commonly used NWBD listed below.

– 8 – IEC 61753-031-2:2014 © IEC 2014

Table 1 – Test details and requirements (1 of 6)
No. Tests Requirements Details
Launch patchcord
≥ 2 m
1 Attenuation (A) Balanced NWBD
length
(Insertion loss)
Configuration 1 × N 2 × N
Source type Unpolarized
IEC 61300-3-
...

IEC 61753-031-2 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Performance
standard –
Part 031-2: Non-connectorized single-mode 1 × N and 2 × N
non-wavelength-selective branching devices for Category C – Controlled
environment
Dispositifs d'interconnexion et composants passifs à fibres optiques – Norme
de performance –
Partie 031-2: Dispositifs de couplage indépendants de la longueur d’onde 1 × N
et 2 × N en unimodal, non-connectorisés, pour catégorie C – Environnement
contrôlé
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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IEC 61753-031-2 ®
Edition 1.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Performance

standard –
Part 031-2: Non-connectorized single-mode 1 × N and 2 × N

non-wavelength-selective branching devices for Category C – Controlled

environment
Dispositifs d'interconnexion et composants passifs à fibres optiques – Norme

de performance –
Partie 031-2: Dispositifs de couplage indépendants de la longueur d’onde 1 × N

et 2 × N en unimodal, non-connectorisés, pour catégorie C – Environnement

contrôlé
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-2981-1

– 2 – IEC 61753-031-2:2014 © IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Test . 6
4 Test report . 7
5 Performance requirements . 7
5.1 Dimensions . 7
5.2 Sample size . 7
5.3 Test details and requirements . 7
Annex A (normative) A and U requirements of 1 × N and 2 × N NWBDs . 14
A.1 Attenuation and uniformity requirements of 1 × N and 2 × N NWBDs
calculated by the equations of Tests No.1 and 2 . 14
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD . 15
Annex B (normative) Sample size . 17
Bibliography . 18

Table 1 – Test details and requirements (1 of 6) . 8
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1 . 14
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in Tests 1 and 2 of Table 1 . 15
Table A.3 – Attenuation requirements of 1 × 2 and 2 × 2 unbalanced NWBD having the
most common port configurations, with the underlying formula as specified in Test 1 of
Table 1 . 15
Table A.4 – Minimum requirements at room temperature of attenuation values for
Class A balanced bidirectional NWBD . 16
Table A.5 – Minimum requirements at room temperature of attenuation values for

Class B balanced bidirectional NWBD . 16
Table B.1 – Sample size for each test . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – PERFORMANCE STANDARD –

Part 031-2: Non-connectorized single-mode 1 × N and 2 × N
non-wavelength-selective branching devices for Category C –
Controlled environment
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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-
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61753-031-2 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version (2015-10) corresponds to the English version published in 2014-09.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3791/FDIS 86B/3823/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.

– 4 – IEC 61753-031-2:2014 © IEC 2014
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61753 series, published under the general title Fibre optic
interconnecting devices and passive components – Performance standard, can be found on
the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 031-2: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices for Category C –
Controlled environment
1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirement of this IEC standard.
The requirements cover balanced bidirectional non-connectorized single-mode 1 × N and
2 × N non wavelength-selective branching devices for use in an IEC Category C environment
(N is the number of branching ports), especially but not exclusively used for PON application.
For balanced NWBD two attenuation and uniformity performance classes are considered:
class A (premium class) which meets more restrictive requirements (i.e. for extended reach
PON application) and class B (standard class) for standard application (i.e. normal reach PON
application).
The requirements also cover unbalanced bidirectional non-connectorized single-mode, non-
wavelength-selective branching devices; however, the specifications of unbalanced branching
devices are limited to 1 × 2 and 2 × 2 devices because they are the most commonly used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-2-50:2012, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – High optical power
IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-17: Tests – Cold

– 6 – IEC 61753-031-2:2014 © IEC 2014
IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance
IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-22: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-3-2:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-2: Examination and measurements – Polarization
dependent loss in a single-mode fibre optic device
IEC 61300-3-3:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-3: Examinations and measurements – Active
monitoring of changes in attenuation and return loss
IEC 61300-3-6:2008, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components
IEC 61300-3-20, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-20: Examinations and measurements – Directivity of
fibre optic branching devices
IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-28: Examinations and measurements – Transient loss
3 Test
All test methods are selected within the IEC 61300 series.
The samples for tests shall be terminated onto single-mode fibres according to category B1.1,
B1.3, or B.6 of IEC 60793-2-50:2012 in either coated fibres (primary and secondary) or
reinforced cable format.
All tests shall be carried out to validate performance over one of the spectral bands listed
below:
1) Spectral bands I:
– 1 260 nm to 1 360 nm
– 1 480 nm to 1 625 nm
2) Spectral bands II:
– 1 260 nm to 1 360 nm
– 1 480 nm to 1 660 nm
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests have been carried out and complied with.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with those given in appropriate manufacturer’s drawings.
5.2 Sample size
Sample sizes for the tests are defined in Annex B.
5.3 Test details and requirements
Performance requirements and details are specified in Table 1.
All optical performances are given only for non-connectorized NWBD. During the
environmental tests where monitoring of the NWBD is needed, all ports of the device shall be
monitored.
In Annex A some numerical values of attenuation and uniformity requirements of Tests No.1
and 2 for the most commonly used NWBD are shown in Tables A.1, A.2 and A.3.
In Tables A.4 and A.5 the minimum attenuation requirements at room temperature are
described by way of equations on the top of column, with the calculated values of the most
commonly used NWBD listed below.

– 8 – IEC 61753-031-2:2014 © IEC 2014

Table 1 – Test details and requirements (1 of 6)
No. Tests Requirements Details
Launch patchcord
≥ 2 m
1 Attenuation (A) Balanced NWBD
length
(Insertion loss)
Configuration 1 × N 2 × N
Source type Unpolarized
IEC 61300-3-
Performance class A B A B
7:2009
Launch conditions
The wavelength of
Spectral band I ≤ 0,5 + 3,3log N (dB) ≤ 0,5 + 3,4log N (dB) ≤ 0,7 + 3,4log N (dB) ≤ 0,7 + 3,5log N (dB)
2 2 2 2
(Method A)
the source shall be
longer than the cut-
Spectral band II
≤ 0,5 + 3,4log N (dB) ≤ 0,5 + 3,5log N (dB) ≤ 0,7 + 3,5log N (dB) ≤ 0,7 + 3,6log N (dB)
2 2 2 2
off wavelength of the
Unbalanced
fibre.
Uncertainty
NWBD
≤ ± 0,05 dB
The measurement
should be performed
≤ 22 – 10,5log P (dB)
with all combination
Spectral band I
of input/output ports
where P is the nominal percentage of power associated with one port
Spectral band II
See Tables A.1, A.2
and A.3 for example
Launch patchcord ≥ 2 m
2 Uniformity (U) Balanced NWBD
length
IEC 61300-3- Configuration
1 × N 2 × N
7:2009 Source type
Unpolarized
Performance class A B A B
(Method A)
Launch conditions The wavelength of
Spectral band I ≤ 0,1 + 0,3log N (dB) ≤ 0,2 + 0,3log N (dB) ≤ 0,4 + 0,4log N (dB) ≤ 0,5 + 0,4log N (dB)
2 2 2 2
the source shall be
longer than the cut-
Spectral band II
≤ 0,1 + 0,4log N (dB) ≤ 0,2 + 0,4log N (dB) ≤ 0,4 + 0,5log N (dB) ≤ 0,5 + 0,5log N (dB)
2 2 2 2
off wavelength of the
fibre.
Uncertainty
≤ ± 0,05 dB
The measurement
should be performed
with all combination
of input/output ports.
See Tables A.1 and
A.2 for example
Table 1 (2 of 6)
No. Tests Requirements Details
Launch
≥ 2 m
3 Directivity
≥ 55 dB
patchcord
length
IEC 61300-3-20
Source type LD
Launch
The wavelength of
conditions
the source shall be
longer than the cut-
off wavelength of the
fibre.
Uncertainty
≤ ± 1 dB
The measurement
should be made
between all pairs of
Input/output ports.
All ports not under
test shall be
terminated to avoid
unwanted reflections
contributing to the
measurement
Launch
≥ 2 m
4 Return loss (RL)
≥ 55 dB
patchcord
IEC 61300-3-6:2008 length
(Method 1, OCWR)
Source type LD
Launch
conditions
The wavelength of
the source shall be
longer than the cut-
off wavelength of the
fibre.
Uncertainty
≤ ± 1 dB
The measurement
should be performed
with all combination
of input/output ports.
All ports not under
test shall be
terminated to avoid
unwanted reflections
contributing to the
measurement
Launch ≥ 2 m
5 Polarization For balanced NWBD:
patchcord
dependent loss
length
1 × N         2 × N
(PDL)
N ≤ 4    ≤ 0,2 dB      ≤ 0,3 dB
IEC 61300-3-2
Source type LD
4 Uncertainty
≤ ± 0,05 dB
N >16   ≤ 0,4 dB      ≤ 0,5 dB
The measurement
For unbalanced 1 × 2 and 2 × 2 NWBD and
should be performed
for any pair of input and output ports:
with all combination
of input/output ports
≤ 0,7 – 0,25log P (DB)
where P is the nominal percentage of the
power associated with one port

– 10 – IEC 61753-031-2:2014 © IEC 2014
Table 1 (3 of 6)
No. Tests Requirements Details
Launch
≥ 2 m
6 High optical power
P = 500 mW (+27 dBm) per port only one
max
patchcord
at the time.
length
IEC 61300-2-14
During the test the change in A shall be

within ± 0,5 dB of the original value under
Source type Unpolarized.
ambient conditions, while on completion of

the test the change in A shall be within ±
Launch
The wavelength of
0,3 dB of the original value.
conditions
the source shall be
longer than the cut-
During and on completion of the test the RL
off wavelength of the
limit of test No. 4 shall be met

fibre
Uncertainty
A test
≤ ± 0,05 dB
Uncertainty
RL test
≤ ± 1 dB
Test
wavelength
1 310 nm ± 20 nm
Spectral band I
1 550 nm ± 20 nm
Test
1 310 nm ± 20 nm
wavelength
1 625 nm ± 20 nm
Spectral band
II
Duration of the
30 min
optical power
exposure at
The measurement
the each level
shall be performed
between the common
port (input port) and
the output ports
Temperature –10 °C ± 2 °C
7 Cold For balanced and unbalanced NWBD

before and on completion of the test the A
Duration of
96 h
IEC 61300-2-17 limits of Test No. 1 shall be met.
exposure
In addition during the test the change in A
Specimens shall be
of balanced NWBD shall be within ± 0,3 dB optically functioning.

for N ≤ 4 and within ± 0,5 dB for N > 4 of
A and RL shall be
the original value under ambient conditions.
For unbalanced NWBD the change in A measured before the
test, during the test at
during the test shall be within ± 0,3 dB for
a maximum interval of
P % > 2 % and ±0,5 dB for P % ≤ 2 % of
1 h and after the test
the original value.
by the Method 3 of
During and after the test the RL limit of test
IEC 61300-3-3:2009
No. 4 shall be met
Temperature
+ 60 °C ± 2 °C.
8 Dry heat – High For balanced and unbalanced NWBD before

temperature and on completion of the test the A limits of
Duration of 96 h
endurance Test No. 1 shall be met.
exposure
In addition, during the test the change in A
Specimens shall be
IEC 61300-2-18
of balanced NWBD shall be within ± 0,3 dB optically functioning.
for N ≤ 4 and within ± 0,5 dB for N > 4 of
A and RL shall be
the original value under ambient conditions.
measured before the
For unbalanced NWBD the change in A
test, during the test at
during the test shall be within ± 0,3 dB for
a maximum interval
P % > 2 % and ±0,5 dB for P % ≤ 2 % of the
of 1 h and after the
original value.
test by the Method 3
During and after the test the RL limit of test
of IEC 61300-3-
No. 4 shall be met
3:2009
Table 1 (4 of 6)
No. Tests Requirements Details
Temperature
+ 40 °C ± 2 °C
9 Damp heat For balanced and unbalanced NWBD

(steady state) before and on completion of the test the A

limits of Test No. 1 shall be met.
Relative
93 % + 2 % to −3 %
IEC 61300-2-19
In addition during the test the change in A humidity

of balanced NWBD shall be within ± 0,3 dB

Duration of
for N ≤ 4 and within ± 0,5 dB for N > 4 of 96 h
exposure
the original value under ambient conditions.

For unbalanced NWBD the change in A Specimens shall be
during the test shall be within ± 0,3 dB for optically functioning.

P % > 2 % and ± 0,5 dB for P % ≤ 2 % of
A and RL shall be
the original value.
measured before the
During and after the test the RL limit of
test, during the test
Test No. 4 shall be met
at a maximum
interval of 10 min and
after the test by the
Method 3 of
IEC 61300-3-3:2009
High + 60 °C ± 2 °C
10 Change of For balanced and unbalanced NWBD
temperature
temperature before and on completion of the test the A

limits of Test No. 1 shall be met.
Low
IEC 61300-2-22
In addition during the test the change in A
temperature
–10 °C ± 2 °C
of balanced NWBD shall be within ± 0,3 dB

for N ≤ 4 and within ± 0,5 dB for N > 4 of

the original value under ambient conditions.
Duration at
For unbalanced NWBD the change in A
1 h
extreme
during the test shall be within ± 0,3 dB for
temperature
P % > 2 % and ± 0,5 dB for P % ≤ 2 % of

the original value.
During and after the test the RL limit of
Temperature
Test No. 4 shall be met.
rate of change
1 °C/min
Number of
cycles
Specimens shall be
optically functioning.
A and RL shall be
measured before the
test, during the test
at a maximum
interval of 10 min and
after the test by the
Method 3 of
IEC 61300-3-3:2009
– 12 – IEC 61753-031-2:2014 © IEC 2014
Table 1 (5 of 6)
No. Tests Requirements Details
Frequency 10 Hz to 55 Hz
11 Vibration For balanced and unbalanced NWBD before
range
(sinusoidal) and on completion of the test the A limits of

Test No. 1 shall be met.
Number of 3 orthogonal
IEC 61300-2-1
In addition during the test the change in A axes
of balanced NWBD shall be within ± 0,3 dB 1 octave/min
Rate of
for N ≤ 4 and within ± 0,5 dB for N > 4 of
change (10 Hz to 55 Hz
the initial value. For unbalanced NWBD the
to 10 Hz): 15
change in A during the test shall be within ±
Number of
0,3 dB for P % > 2 % and within ±0,5 dB for
sweeps 0,75 mm
P % ≤ 2 % of the initial value.

During and after the test the RL limit of Test Vibration NWBD shall be
No. 4 shall be met
amplitude optically functioning.
A and RL shall be
measured before and
after the test by
means the set-ups
defined in Test No. 1
and No. 4.
In addition during the
test the change in A
shall be measured by
the IEC 61300-3-28
(Transient loss) at
1 550 nm ± 25 nm
Magnitude of 2 N for reinforced
12 Flexing of strain For balanced and unbalanced NWBD before
the load cable.
relief of fibre optic and on completion of the test the A limits of
For primary and
devices Test No. 1 shall be met.
secondary coated
IEC 61300-2-44 In addition on completion of the test the fibre the test can be
change in A of balanced NWBD shall be omitted.
within ± 0,3 dB for N ≤ 4 and within ± 0,5 dB Number of
cycles
for N > 4 of the initial value. For unbalanced 30 at ± 90°

NWBD the change in A after the test shall

NWBD shall be
be within ± 0,3 dB for P % > 2 % and within
optically functioning.
± 0,5 dB for P % ≤ 2 % of the initial value.
A and RL shall be
After the test the RL limit of Test No. 4 shall
measured before and
be met
after the test by
means the setups
defined in Tests No. 1
and No. 4
Table 1 (6 of 6)
No. Tests Requirements Details
Magnitude and
10 N ± 1 N at a speed
13 Fibre/cable retention For balanced and unbalanced NWBD before
rate of
of 5 N/s for reinforced
and on completion of the test the A limits of
IEC 61300-2-4 application of
cable; 5 N ± 0,5 N at a
Test No. 1 shall be met.
the tensile
speed of 0,5 N/s for
In addition on completion of the test the load
secondary coated
change in A of balanced NWBD shall be within
fibres; 2 N ± 0,2 N at a
± 0,3 dB for N ≤ 4 and within ± 0,5 dB for N > 4
speed of 0,5 N/s for
of the initial value. For unbalanced NWBD the
primary coated fibres.
change in A after the test shall be within ±

0,3 dB for P % > 2 % and within ± 0,5 dB for

Point of
P % ≤ 2 % of the initial value. 0,3 m from the end of
application of
the NWBD
After the test the RL limit of Test No. 4 shall be
tensile load
met
Duration of
120 s at 10 N;
the test
60 s at 2 N and 5 N
(maintaining
the load)
NWBD shall be optically
functioning.
A and RL shall be
measured before and
after the test by means
the setups defined in
Tests No. 1 and No. 4
Magnitude of 1 N for 1 h for
14 Static side load For balanced and unbalanced NWBD before
the load reinforced cables;
and on completion of the test the A limits of
0,2 N for 5 min for
IEC 61300-2-42 Test No. 1 shall be met.
secondary coated
In addition on completion of the test the fibres.
change in A of balanced NWBD shall be within For primary coated fibre
± 0,3 dB for N ≤ 4 and within ± 0,5 dB for N > 4 the test can be omitted.
of the initial value. For unbalanced NWBD the
The test shall be
change in A after the test shall be within ±
applied in two mutually
0,3 dB for P % > 2 % and within ± 0,5 dB for
perpendicular directions
P % ≤ 2 % of the initial value.
as permitted by the
After the test the RL limit of Test No. 4 shall be
device design.
met
NWBD shall be optically
functioning.
A and RL shall be
measured before and
after the test by means
the setups defined in
Tests No. 1 and No. 4.
Acceleration Components:5 000 m/s
15 Shock For balanced and unbalanced NWBD before
forces for mass ≤ 0,125 kg
and on completion of the test the A limits of
IEC 61300-2-9
Test No. 1 shall be met.
Modules:
In addition on completion of the test the
2 000 m/s for:
change in A of balanced NWBD shall be within
0,125 kg < mass
± 0,3 dB for N ≤ 4 and within ± 0,5 dB for N > 4
≤ 0,225 kg;
of the initial value. For unbalanced NWBD the
500 m/s for:
change in A after the test shall be within ±
0,225 kg < mass
0,3 dB for P % > 2 % and within ± 0,5 dB for
≤ 1 kg.
P % ≤ 2 % of the initial value.

Nominal 1 ms, half sine pulse
After the test the RL limit of Test No. 4 shall be
duration
met
No. of shocks 3 axes in 2 directions,
2 shocks per axis,
12 shocks total.
NWBD shall be optically
functioning. A and RL
shall be measured
before and after the test
by means the setups
defined in Tests No. 1
and No. 4.
– 14 – IEC 61753-031-2:2014 © IEC 2014
Annex A
(normative)
A and U requirements of 1 × N and 2 × N NWBDs
A.1 Attenuation and uniformity requirements of 1 × N and 2 × N NWBDs
calculated by the equations of Tests No.1 and 2
Tables A.1, A.2 and A.3 show the attenuation and uniformity requirements for different
classes with the underlying formulas as specified in the Tests 1 and 2 of Table 1.
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class A, with the underlying formulas
as specified in the Tests 1 and 2 of Table 1
N 1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) U (dB) A (dB) U (dB) A (dB) U (dB) A (dB) U (dB)
max max max max max max max max
0,5+3,3log 0,1+0,3log 0,5+3,4log 0,1+0,4log 0,7+3,4log 0,4+0,4log 0,7+3,5log 0,4+0,5log
2 2 2 2 2 2 2 2
N N N N N N N N
2 3,8 0,4 3,9 0,5 4,1 0,8 4,2 0,9
3 5,7 0,6 5,9 0,7 6,1 1,0 6,2 1,2
4 7,1 0,7 7,3 0,9 7,5 1,2 7,7 1,4
6 9,0 0,9 9,3 1,1 9,5 1,4 9,7 1,7
8 10,4 1,0 10,7 1,3 10,9 1,6 11,2 1,9
12 12,3 1,2 12,7 1,5 12,9 1,8 13,2 2,2
16 13,7 1,3 14,1 1,7 14,3 2,0 14,7 2,4
24 15,6 1,5 16,1 1,9 16,3 2,2 16,7 2,7
32 17,0 1,6 17,5 2,1 17,7 2,4 18,2 2,9
64 20,3 1,9 20,9 2,5 21,1 2,8 21,7 3,4
128 23,6 2,2 24,3 2,9 24,5 3,2 25,2 3,9
NOTE N is the number of branching ports.

Table A.2 – Attenuation and uniformity requirements of balanced bidirectional NWBD
having the most common port configurations for Class B, with the underlying formulas
as specified in Tests 1 and 2 of Table 1
N° 1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) U (dB) A (dB) U (dB) A (dB) U (dB) A (dB) U (dB)
max max max max max max max max
0,5+3,4log 0,2+0,3log 0,5+3,5log 0,2+0,4log 0,7+3,5log 0,5+0,4log 0,7+3,6log 0,5+0,5log
2 2 2 2 2 2 2
N N N N N N N N
2 3,9 0,5 4,0 0,6 4,2 0,9 4,3 1,0
3 5,9 0,7 6,0 0,8 6,2 1,1 6,4 1,3
4 7,3 0,8 7,5 1,0 7,7 1,3 7,9 1,5
6 9,3 1,0 9,5 1,2 9,7 1,5 10,0 1,8
8 10,7 1,1 11,0 1,4 11,2 1,7 11,5 2,0
12 12,7 1,3 13,0 1,6 13,2 1,9 13,6 2,3
16 14,1 1,4 14,5 1,8 14,7 2,1 15,1 2,5
24 16,1 1,6 16,5 2,0 16,7 2,3 17,2 2,8
32 17,5 1,7 18,0 2,2 18,2 2,5 18,7 3,0
64 20,9 2,0 21,5 2,6 21,7 2,9 22,3 3,5
128 24,3 2,3 25,0 3,0 25,2 3,3 25,9 4,0
NOTE N is the number of branching ports.
Table A.3 – Attenuation requirements of 1 × 2 and 2 × 2 unbalanced NWBD having
the most common port configurations, with the underlying formula as specified in
Test 1 of Table 1
Coupling ratio A /A
1 2
max max
(P %/P %) dB
1 2
(22 – 10,5log P )/(22 – 10,5log P )
10 1 10 2
40/60 5,2 / 3,3
30/70 6,5 / 2,6
20/80 8,3 / 2,0
10/90 11,5 / 1,5
5/95 14,7 / 1,2
2/98 18,8 / 1,1
1/99 22,0 / 1,0
A.2 Minimum requirements at room temperature of attenuation values for
balanced bidirectional 1 × N and 2 × N NWBD
Tables A.4 and A.5 show the minimum requirements at room temperature of attenuation
values for different classes.
– 16 – IEC 61753-031-2:2014 © IEC 2014
Table A.4 – Minimum requirements at room temperature of attenuation values
for Class A balanced bidirectional NWBD
N°
1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) A (dB) A (dB) A (dB)
max max max max
0,5+3,2log N 0,5+3,3log N 0,7+3,3log N 0,7+3,4log N
2 2 2 2
2 3,7 3,8 4,0 4,1
3 5,6 5,7 5,9 6,1
4 6,9 7,1 7,3 7,5
6 8,8 9,0 9,2 9,5
8 10,1 10,4 10,6 10,9
12 12,0 12,3 12,5 12,9
16 13,3 13,7 13,9 14,3
24 15,2 15,6 15,8 16,3
32 16,5 17,0 17,2 17,7
64 19,7 20,3 20,5 21,1
128 22,9 23,6 23,8 24,5
NOTE N is the number of branching ports.

Table A.5 – Minimum requirements at room temperature of
attenuation values for Class B balanced bidirectional NWBD
N° 1 × N 2 × N
Spectral band I Spectral band II Spectral band I Spectral band II
A (dB) A (dB) A (dB) A (dB)
max max max max
0,5+3,3log N 0,5+3,4log N 0,7+3,4log N 0,7+3,5log N
2 2 2 2
2 3,8 3,9 4,1 4,2
3 5,7 5,9 6,1 6,2
4 7,1 7,3 7,5 7,7
6 9,0 9,3 9,5 9,7
8 10,4 10,7 10,9 11,2
12 12,3 12,7 12,9 13,2
16 13,7 14,1 14,3 14,7
24 15,6 16,1 16,3 16,7
32 17,0 17,5 17,7 18,2
64 20,3 20,9 21,1 21,7
128 23,6 24,3 24,5 25,2
NOTE N is the number of branching ports.

Annex B
(normative)
Sample size
As shown in Table B.1, all samples shall be subjected to Tests 1 – 5. All other tests shall be
carried out in any of the following order. Consecutive testing on the same optical sample is
allowed, but in case of failure during the consecutive testing, a new sample shall be prepared
and the failed test shall be redone.
Table B.1 – Sample size for each test
Test number Test Sample size
1 Attenuation (insertion loss) 12
2 Uniformity 12
3 Directivity 12
4 Return loss 12
5 Polarization dependent loss 12
6 High optical power 4
7 Cold 4
8 Dry heat – High temperature endurance 4
9 Damp heat (steady state) 4
10 Change of temperature 4
11 Vibration 4
12 Flexing of the strain relief of fibre optic devices 4
13 Fibre/cable retention 4
14 Static side load 4
15 Shock 4
– 18 – IEC 61753-031-2:2014 © IEC 2014
Bibliography
IEC 60875-1, Fibre optic interconnecting devices and passive optical components – Non-
wavelength-selective fibre optic branching devices – Part 1: Generic specification
IEC 61753-1, Fibre optic interconnecting devices and passive components performance
standard – Part 1: General and guidance for performance standard
Recommendation ITU-T G.671, Transmission characteristics of optical components and
subsystems
_____________
– 20 – IEC 61753-031-2:2014 © IEC 2014
SOMMAIRE
AVANT-PROPOS . 21
1 Domaine d'application . 23
2 Références normatives . 23
3 Essai . 24
4 Rapport d’essai . 25
5 Exigences de performances . 25
5.1 Dimensions . 25
5.2 Nombre d’échantillons . 25
5.3 Exigences et détails d'essai . 25
Annexe A (normative) Exigences A et U des NWBD 1 N et 2 × N . 34
A.1 Exigences d'affaiblissement et d'uniformité des NWBD 1 × N et 2 × N
calculées par les équations des essais N° 1 et 2 . 34
A.2 Exigences minimales à température ambiante des valeurs d’affaiblissement
pour les NWBD 1 × N et 2 × N bidirectionnels symétriques . 35
Annexe B (normative) Nombre d’échantillons . 37
Bibliographie . 38

Tableau 1 – Détails et exigences d’essai (1 de 8) . 26
Tableau A.1 – Exigences d'affaiblissement et d'uniformité des NWBD bidirectionnels
symétriques ayant les configurations de ports les plus courantes pour la Classe A,
avec les formules spécifiées dans les essais 1 et 2 du Tableau 1 . 34
Tableau A.2 – Exigences d'affaiblissement et d'uniformité des NWBD bidirectionnels
symétriques ayant les configurations de ports les plus courantes pour la Classe B,
avec les formules spécifiées dans les essais 1 et 2 du Tableau 1 . 35
Tableau A.3 – Exigences d'affaiblissement des NWBD 1 × 2 et 2 × 2 asymétriques
ayant les configurations de ports les plus courantes, avec les formules spécifiées dans
l'essai 1 du Tableau 1 . 35
Tableau A.4 – Exigences minimales à température ambiante des valeurs
d’affaiblissement pour les NWBD bidirectionnels de classe A symétriques . 36
Tableau A.5 – Exigences minimales à température ambiante des valeurs

d’affaiblissement pour les NWBD bidirectionnels de classe B symétriques . 36
Tableau B.1 – Nombre d’échantillons pour chaque essai. . 37
...