ISO/IEC 14763-3:2014

ISO/IEC 14763-3
Edition 2.0 2014-06
INTERNATIONAL
STANDARD
colour
inside
Information technology – Implementation and operation of customer premises
cabling –
Part 3: Testing of optical fibre cabling

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ISO/IEC 14763-3
Edition 2.0 2014-06
INTERNATIONAL
STANDARD
colour
inside
Information technology – Implementation and operation of customer premises

cabling –
Part 3: Testing of optical fibre cabling

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
G
ICS 35.200 ISBN 978-2-8322-1631-6

– 2 – ISO/IEC 14763-3:2014  ISO/IEC 2014
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 13
3.3 Symbols . 13
4 Conformance . 14
5 General requirements . 14
5.1 Test system . 14
5.2 Reference measurement and calibration . 15
5.3 Environmental conditions . 15
5.3.1 Protection of transmission and terminal equipment . 15
5.3.2 Inspecting and cleaning connectors . 15
5.3.3 Use of test equipment . 15
5.3.4 Relevance of measurement . 16
5.3.5 Treatment of marginal test results . 16
5.4 Documentation . 16
6 Test equipment . 16
6.1 Light source and power meter . 16
6.1.1 General . 16
6.1.2 Light sources . 16
6.1.3 Power meters . 17
6.1.4 Test system stability (ffs) . 17
6.2 OTDR . 17
6.2.1 General . 17
6.2.2 OTDR characterization using a launch test cord and a tail test
cord . 18
6.3 Test cords and adapters . 18
6.3.1 Connecting hardware at test interfaces . 18
6.3.2 Reference connector requirements . 19
6.3.3 Test cords . 20
6.4 MMF launched modal distribution . 22
6.5 SMF launch condition . 22
7 Inspection equipment. 22
8 Cabling under test – Channels and permanent links . 23
8.1 General . 23
8.2 Reference planes . 23
8.3 Wavelength of measurement . 24
8.4 Direction of measurement . 24
9 Testing of installed cabling . 25
9.1 Attenuation . 25
9.1.1 LSPM . 25
9.1.2 OTDR . 29

9.2 Propagation delay . 31
9.2.1 Test method . 31
9.2.2 Treatment of results . 32
9.3 Length . 32
9.3.1 Test method . 32
9.3.2 Measurement uncertainty . 32
9.3.3 Treatment of results . 32
10 Testing of cabling components within installed cabling . 33
10.1 Attenuation of optical fibre cable . 33
10.1.1 Test method . 33
10.1.2 Measurement uncertainty . 33
10.1.3 Treatment of results . 33
10.2 Attenuation of local and remote test interfaces . 34
10.2.1 Test method . 34
10.2.2 Test system measurement uncertainty . 34
10.2.3 Treatment of results . 35
10.3 Attenuation of connecting hardware . 36
10.3.1 Test method . 36
10.3.2 Treatment of results . 36
10.4 Return loss of connecting hardware . 37
10.4.1 Test method (in accordance with IEC 61300-3-6, method 2) . 37
10.4.2 Treatment of results . 38
10.4.3 Measurement uncertainty . 39
10.5 Optical fibre length . 39
10.5.1 Test method . 39
10.5.2 Measurement uncertainty . 41
10.5.3 Treatment of results . 41
10.6 Attenuation of cords . 41
10.6.1 Test method . 41
10.6.2 Treatment of results . 42
11 Inspection of cabling and cabling components . 42
11.1 Optical fibre continuity . 42
11.2 Cabling polarity . 42
11.3 Optical fibre cable length . 42
11.4 Inspection of optical fibre end faces . 43
11.5 Optical fibre core size . 43
Annex A (normative) Launch modal conditions for testing multimode optical fibre
cabling . 44
Annex B (normative) Visual inspection criteria for connectors . 45
Annex C (informative) Optical time domain reflectometry . 46
C.1 Operational capability . 46
C.1.1 Effective characterization. 46
C.1.2 Dynamic range . 46
C.1.3 Pulse width . 46
C.1.4 Integration or sample count . 46
C.2 Limitations of OTDR capability . 47
C.2.1 Minimum lengths of operation – Attenuation dead zone . 47
C.2.2 Ghosting . 48

– 4 – ISO/IEC 14763-3:2014  ISO/IEC 2014
C.2.3 Effective group index of refraction . 49
C.2.4 Backscattering coefficient . 49
Annex D (normative) Inspection and testing of test and substitution test cords . 50
D.1 General requirements . 50
D.2 Attenuation (test and substitution test cord reference connections) . 50
Annex E (informative) Enhanced three-test-cord and one-test-cord reference methods
for link and channel attenuation . 52
E.1 Reference methods for link attenuation . 52
E.2 One-test-cord reference method for link attenuation . 52
E.3 Test method for channel attenuation . 52
Annex F (informative) Quality planning . 53
F.1 Inspection and test schedules . 53
F.2 Stage 1 inspection and testing . 53
F.3 Stage 2 testing . 53
F.3.1 Basic test group . 53
F.3.2 Extended test group . 54
Annex G (informative)  Examples of calculations of channel and permanent link limits . 55
G.1 Channel measurement . 55
G.2 Permanent link measurement . 55
Annex H (informative)  Cleaning and inspection of fibre optic connections . 57
Bibliography . 58

Figure 1 – Relationship of related International Standards . 8
Figure 2 – Test system and the cabling under test . 15
Figure 3 – OTDR characterization using a launch test cord and a tail test cord . 18
Figure 4 – An example of test cord labelling and identification . 20
Figure 5 – OTDR launch test cord and/or tail test cord schematic . 21
Figure 6 – Channels and permanent links in accordance with ISO/IEC 11801 and
equivalent standards . 23
Figure 7 – Channel and permanent link test configuration . 24
Figure 8 – LSPM enhanced three-test-cord attenuation measurement of installed
channels . 26
Figure 9 – LSPM one test cord attenuation measurement of installed permanent links . 27
Figure 10 – OTDR measurement of installed cabling (channel): 2 point attenuation
measurement method . 30
Figure 11 – OTDR measurement of installed cabling (permanent link) . 31
Figure 12 – OTDR measurement of optical fibre attenuation . 34
Figure 13 – OTDR measurement of connection attenuation. 35
Figure 14 – OTDR measurement of joint attenuation . 37
Figure 15 – OTDR measurement of return loss . 38
Figure 16 – Determination of length using an OTDR . 39
Figure 17 – OTDR characterization of a SMF permanent link containing a break . 40
Figure 18 – OTDR characterization of a permanent link containing a macrobend . 41
Figure 19 – Measurement of cord interface attenuation . 42
Figure C.1 – OTDR characterization using different length launch test cords . 47
Figure C.2 – OTDR characterization showing ghost effects . 48

Figure C.3 – OTDR characterization showing complex ghost effects . 49
Figure D.1 – Measurement of substitution test cord interface attenuation . 50

Table 1 – MMF light source characteristics . 17
Table 2 – SMF light source characteristics . 17
Table 3 – Non-LC reference connector requirements . 19
Table 4 – Connecting hardware attenuation . 28
Table C.1 – Default effective group IOR values . 49
Table C.2 – Default backscattering coefficient values . 49

– 6 – ISO/IEC 14763-3:2014  ISO/IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INFORMATION TECHNOLOGY – IMPLEMENTATION
AND OPERATION OF CUSTOMER PREMISES CABLING –

Part 3: Testing of optical fibre cabling

FOREWORD
1) ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)
form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in
liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have
established a joint technical committee, ISO/IEC JTC 1.
2) The formal decisions or agreements of IEC and ISO 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 IEC National Committees and ISO member bodies.
3) IEC, ISO and ISO/IEC Publications have the form of recommendations for international use and are accepted
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ensure that the technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held
responsible for the way in which they are used or for any misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees and ISO member bodies undertake to
apply IEC, ISO and ISO/IEC publications transparently to the maximum extent possible in their national and
regional publications. Any divergence between any ISO, IEC or ISO/IEC publication and the corresponding
national or regional publication should be clearly indicated in the latter.
5) ISO and IEC do not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. ISO or IEC are not responsible
for any services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or ISO or its directors, employees, servants or agents including individual experts
and members of their technical committees and IEC National Committees or ISO member bodies for any
personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for
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Publication or any other IEC, ISO or ISO/IEC publications.
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 ISO/IEC Publication may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
International Standard ISO/IEC 14763-3 was prepared by subcommittee 25: Interconnection
of information technology equipment, of ISO/IEC joint technical committee 1: Information
technology.
This second edition cancels and replaces the first edition published in 2006 and its
Amendment 1:2009.
This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– general requirements (Clause 5) have been revised and the concept of normalization has
been replaced by reference measurements;
– OTDR characterization (6.2) and requirements for cabling interface adapters (6.3) and test
cords have been revised and requirements for single-mode fibre test cords (6.3.4) have
been removed;
– enhanced three-test-cord reference method has been introduced (9.1.1.2);
– requirements for the attenuation measurement of cords (10.6) have been revised;
– Annex A "Launched modal distribution (LMD)" has been simplified and the new title now
reads "Launched modal conditions for testing multimode optical fibre cabling";
– visual inspection criteria for connectors have been reworked (Annex B);
– information on optical time domain reflectometry (Annex C) has been revised;
– examples of calculations of channel and permanent link limits (Annex G) have been
revised;
– and information regarding cleaning and inspection of fibre optic connections have been
added (Annex H).
A list of all parts in the ISO/IEC 14763 series, published under the general title Information
technology – Implementation and operation of customer premises cabling, can be found on
the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
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.
The contents of the corrigendum of March 2015 have been included in this copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 8 – ISO/IEC 14763-3:2014  ISO/IEC 2014
INTRODUCTION
This International Standard is one of four prepared in support of International Standard
ISO/IEC 11801 and other cabling standards.
Figure 1 below shows the inter-relationship between ISO/IEC 11801 and other International
Standards and for cabling systems with related standards.

ISO/IEC 24702 ISO/IEC 24764 ISO/IEC 15018
ISO/IEC 14763-2
ISO/IEC 11801
Information technology – Information technology – Information technology – Information technology –
Information technology –
Implementation and Generic cabling – Generic cabling systems Generic cabling for
Generic cabling for
operation of customer Industrial premises for data centres homes
customer premises
premises cabling
Part 2: Planning and
installation
IEC 61935-1 ISO/IEC 14763-3 IEC 61935-3
Generic specification for the Information technology – Testing of balanced and coaxial
Implementation and operation of information technology cabling
testing of elements of generic cabling
in accordance with ISO/IEC 11801 customer premises cabling Part 3:Installed cabling as specified in
Part 1: Test methods Part 3: Testing of optical fibre cabling ISO/IEC 15018 and related standards

Figure 1 – Relationship of related International Standards
ISO/IEC 14763-3 details the inspection and test procedures for optical fibre cabling,
a) designed in accordance with premises cabling standards including ISO/IEC 11801,
ISO/IEC 24764, ISO/IEC 24702 and ISO/IEC 15018, and
b) installed according to the requirements and recommendations of ISO/IEC 14763-2.
Users of this International Standard should be familiar with relevant premises cabling
standards and ISO/IEC 14763-2.
The quality plan for each installation will define the acceptance tests and sampling levels
selected for that installation. Requirements and recommendations for the development of a
quality plan are described in ISO/IEC 14763-2.
NOTE JTC 1/SC 25, in cooperation with IEC/TC 86, is currently developing an overall quantitative model to
calculate total measurement uncertainty as stated in the reference planes of ISO/IEC 11801. When such a model
has been verified, it is expected to be incorporated into this standard in form of an Amendment, thereby removing
pertinent clauses currently marked “ffs” (for further study).

INFORMATION TECHNOLOGY – IMPLEMENTATION
AND OPERATION OF CUSTOMER PREMISES CABLING –

Part 3: Testing of optical fibre cabling

1 Scope
This part of ISO/IEC 14763 specifies systems and methods for the inspection and testing of
installed optical fibre cabling designed in accordance with premises cabling standards
including ISO/IEC 11801, ISO/IEC 24764, ISO/IEC 24702 and ISO/IEC 15018. The test
methods refer to existing standards-based procedures where they exist.
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.
ISO/IEC 11801, Information technology – Generic cabling for customer premises
ISO/IEC 14763-2, Information technology – Implementation and operation of customer
premises cabling – Part 2: Planning and installation
IEC 60050-731, International Electrotechnical Vocabulary – Chapter 731: Optical fibre
communication
IEC 60825-2, Safety of laser products – Part 2: Safety of optical fibre communication systems
(OFCS)
IEC 60874-14-3, Connectors for optical fibres and cables – Part 14-3: Detail specification for
fibre optic adapter (simplex) type SC for single-mode fibre
IEC 60874-19-1, Fibre optic interconnecting devices and passive components – Connectors
for optical fibres and cables – Part 19-1: Fibre optic patch cord connector type SC-PC
(floating duplex) standard terminated on multimode fibre type A1a, A1b – Detail specification
IEC 61280-1-3, Fibre optic communication subsystem test procedures – Part 1-3: General
communication subsystems – Central Wavelength and spectral width measurement
IEC 61280-1-4, Fibre optic communication subsystem test procedures – Part 1-4: General
communication subsystems – Light source encircled flux measurement method
IEC 61280-4-1, Fibre-optic communication subsystem test procedures – Part 4-1: Installed
cable plant – Multimode attenuation measurement
IEC 61280-4-2, Fibre optic communication subsystem basic test procedures – Part 4-2: Fibre
optic cable plant – Single-mode fibre optic cable plant attenuation
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation

– 10 – ISO/IEC 14763-3:2014  ISO/IEC 2014
IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-35:2009, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-35: Examinations and measurements – Fibre optic
connector endface visual and automated inspection
IEC 61300-3-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-42: Examinations and measurements – Attenuation of
single mode alignment sleeves and or adaptors with resilient alignment sleeves
IEC 61755-3-1, Fibre optic connector optical interfaces – Part 3-1: Optical interface, 2,5 mm
and 1,25 mm diameter cylindrical full zirconia PC ferrule, single mode fibre
IEC 61755-3-2, Fibre optic connector optical interfaces – Part 3-2: Optical interface, 2,5 mm
and 1,25 mm diameter cylindrical full zirconia ferrules for 8 degrees angled-PC single mode
fibres
IEC 62614, Fibre optics – Launch condition requirements for measuring multimode
attenuation
IEC 62664-1-1, Fibre optic interconnecting devices and passive components – Fibre optic
connector product specifications – Part 1-1: LC-PC duplex multimode connectors terminated
on IEC 60793-2-10 category A1a fibre
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions of ISO/IEC 11801 and
IEC 60050-731 as well as the following apply.
3.1.1
adapter
device that enables interconnection between terminated optical fibre cables
3.1.2
attenuation
A
reduction in optical power induced by transmission through a medium such as optical fibre,
given as A = 10 lg(P /P ), where P and P are the power, typically measured in mW,
out in in out
into and out of the cabling
Note 1 to entry: The values of A are in decibel (dB).
3.1.3
attenuation dead zone
region after the event where the displaced trace
deviates from the undisturbed backscatter trace by more than a given vertical distance ∆F
Note 1 to entry: ∆F is commonly accepted to be a value of 0,5 dB.
[SOURCE: IEC 61746-1:2009, and IEC 61746-2:2010, 3.3, modified – The note has been
changed and Figure 1 has not been included.]

3.1.4
cable sheath
covering over the optical fibre or conductor assembly that may include one or more metallic
members, strength members or jackets
Note 1 to entry: Sometimes simply referred to as “sheath”.
3.1.5
3.1.5.1
connection
mated device including terminations connecting two cables or cable elements
3.1.5.2
connection
combination of devices including terminations connecting two cables or cable elements
3.1.6
encircled flux
fraction of cumulative near-field power to the total output power as a function of radial
distance from the optical centre of the core
3.1.7
event dead zone
distance in which an OTDR cannot detect a reflective event following a reflective event
3.1.8
fail result
measured value which fails to meet the specified requirement and where the absolute value of
the difference between the measured value and the specified requirement is greater than the
stated measurement uncertainty
Note 1 to entry: The fail result is for further study (ffs).
3.1.9
launch test cord
cable assembly used to connect from a light source to the cabling under test or as part of a
test reference measurement
3.1.10
light source and power meter
test system consisting of a light source (LS), power meter (PM) and associated test cords
used to measure the attenuation of installed cable plant
3.1.11
marginal result
measured value which differs from the specified requirement by an amount not exceeding the
stated measurement uncertainty
Note 1 to entry: The marginal result is for further study (ffs).
3.1.12
multimode optical fibre
optical fibre along whose core the radiation of two or more bound modes can propagate at the
wavelength of interest
Note 1 to entry: A typical multimode fibre propagates about 100 modes or more.
[SOURCE: IEC 60050-731:1991, 731-02-03, modified – definition slightly changed and note
added.]
– 12 – ISO/IEC 14763-3:2014  ISO/IEC 2014
3.1.13
optical fibre
filament shaped optical waveguide made of dielectric materials
[SOURCE: IEC 60050-731:1991, 731-02-01]
3.1.14
optical time domain reflectometer
instrument used to characterise optical fibre cabling by measuring the backscatter and
reflection of injected light pulses as a function of time
3.1.15
pass result
measured value which meets the specified requirements and where the absolute value of the
difference between the measured value and the specified requirement is greater than the
stated measurement uncertainty, provided any apparent gain does not exceed the
measurement uncertainty
Note 1 to entry: The pass result is for further study (ffs).
3.1.16
reference adapter
adapter that ensures that the performance of reference connections can be attained
Note 1 to entry: This definition is only applicable to connectors with cylindrical ferrules.
3.1.17
reference connector
connector with tightened tolerances terminated onto an optical fibre that may require
tightened tolerances such that the expected attenuation formed by mating two such
assemblies is less than or equal to a specified value that is lower than the normal expected
attenuation
3.1.18
reference measurement
measurement of the output power of the light source that is used to determine the input power
level to the cabling under test
3.1.19
singlemode optical fibre
optical fibre which supports only one mode of light transmission
3.1.20
substitution test cord
test cord used within a reference measurement which is replaced during the measurement of
the attenuation of the cabling under test
3.1.21
tail test cord
cable assembly used to connect from a power meter to the cabling under test or as part of a
test reference measurement
3.1.22
test cord
cable assembly used either to connect test equipment to the cabling under test or as part of a
test reference measurement
3.1.23
test operator
skilled person testing in accordance with instructions provided by the test system designer
3.1.24
test system
test equipment, test cords and adapters necessary to undertake a given test in accordance
with the requirements of this standard
3.2 Abbreviations
For the purposes of this document, the abbreviations of ISO/IEC 11801 as well as the
following apply.
APC Angled Physical Contact
CP Consolidation Point
DUT Device Under Test
EQP Equipment
ffs for further study
IOR Index Of Refraction
LTC Launch Test Cord
LS Light Source
LSA Least Squares Average
LSPM Light Source And Power Meter
MMF MultiMode optical Fibre
MPO Multifibre Push-On connector
N/A Not Applicable
OTDR Optical Time Domain Reflectometer
PC Physical Contact
PM Power Meter
RL Return Loss
SC Subscriber Connector
SMF Single-Mode optical Fibre
STC Substitution Test Cord
TTC Tail Test Cord
3.3 Symbols
For the purposes of this document the following symbols apply.

– 14 – ISO/IEC 14763-3:2014  ISO/IEC 2014
Optical fibre connector (general)

Optical fibre connector on installed cabling

Optical fibre connector with reference termination

Optical fibre adapter (general)

Optical fibre adapter imbedded in cabling

Optical fibre reference adapter

Splice
4 Conformance
To test installed cabling according to this International Standard
a) the general requirements of Clauses 5 and 8 shall be met,
b) the test equipment and test cords shall conform to the requirements of Clause 6,
c) the test method, as appropriate, and treatment of results shall conform to Clauses 9 and
10,
d) the test results shall be documented in accordance with 5.4,
e) the requirements of IEC 60825-2 concerning safety of laser products shall be met.
To inspect installed cabling according to this standard
1) the inspection equipment shall conform to the requirements of Clause 7,
2) the inspection method, as appropriate, shall conform to Clause 11,
3) the requirements of IEC 60825-2 concerning safety of laser products shall be met.
Relevant national and local regulations covering safe working practices shall be observed.
5 General requirements
5.1 Test system
The test systems defined in this standard comprise local test equipment and remote test
equipment (where required) together with test cords and adapters which enable the
connection of the test equipment to the cabling under test (see Figure 2).
Certain test methods of this standard may apply to the testing of plastic optical fibre cabling
(i.e. attenuation) although no detailed information is provided. Plastic optical fibre category A4
fibres are specified in IEC 60793-2-40.
The test system and, particularly the adapters and reference connectors, affect the
uncertainty of the attenuation measurement for a given component, link or channel.
Index matching materials (gels and/or fluids) between the polished end faces of connectors
shall not be used.
Remote cabling
Local cabling
test cord and
test cord and
adapter
adapter
(where required
(where required
by test method)
by test method)
Test interface Test interface
Local test Remote test
equipment equipment
TEST TEST
EQP EQP
Remote test
Local test Cabling under test
system
system
(where required
by test method)
Figure 2 – Test system and the cabling under test
5.2 Reference measurement and calibration
Reference measurement processes are specified, where appropriate, to enable the test
system to achieve the stated measurement uncertainty.
The test equipment shall be calibrated using standardised procedures (e.g. IEC 61315 and
IEC 61746), or tester manufacturers’ documented procedures, as appropriate.
The test operator shall have evidence, in the form of a valid calibration certificate, to support
the use of the test equipment at the time the tests are carried out.
5.3 Environmental conditions
5.3.1 Protection of transmission and terminal equipment
Transmission and terminal equipment shall be disconnected from the cabling under test
before any testing or inspection according to this standard is carried out.
5.3.2 Inspecting and cleaning connectors
Dust, dirt and other contaminants at the interfaces to the cabling under test or at interfaces of
the test cords and at the interface to the test equipment may produce misleading results and
in some cases damage the cabling under test.
Connector end faces on the test cords shall be inspected in accordance with Annex B. If they
are dirty or contaminated they should be cleaned following the recommendations of Annex H
and re-inspected. If the connectors on the test cords are damaged and/or fail to meet the
requirements of Annex B, the test cords shall be replaced.
Connector end faces on the cabling under test shall be inspected in accordance with Annex B.
If they are dirty or contaminated they should be cleaned following the recommendations of
Annex H and re-inspected in accordance with Annex B. If the connectors on the cabling under
test are damaged and/or fail to meet the requirements of Annex B, then the failure shall be
reported with the recommendation that the connector be replaced.
5.3.3 Use of test equipment
External effects (for example, environmental, electromagnetic or physical) can affect the test
equipment and thereby influence the measured results. Test equipment shall be operated per
manufacturer’s specifications. Unless manufacturer specifications provide other information,
test equipment shall be allowed to stabilise at the test environment for at least 15 min prior to
readings being taken.
– 16 – ISO/IEC 14763-3:2014  ISO/IEC 2014
5.3.4 Relevance of measurement
Measurements shall either
a) be made under environmental conditions which are representative of the intended
operational environment,
b) be documented as being performed under non-representative conditions.
5.3.5 Treatment of marginal test results
Marginal results may be treated in a number of ways including
a) verification of the reference measurement of the test system,
b) acceptance of all marginal results,
c) repetition of the measurement using a test system with improved measurement
uncertainty.
5.4 Documentation
The documentation for each parameter shall include
a) identification and details of the parameter,
b) whether channel or permanent link is being tested,
c) test equipment:
1) type and manufacturer;
2) serial number and calibration status;
3) nominal wavelength,
d) optical fibre cabling details (category of cabled optical fibre performance e.g. OM2, OM3,
OM4, OS1, OS2)
e) details of the cabling connector type(s),
f) the configuration of the cabling test equipment during the test,
g) the measured result,
h) the applicable requirements,
i) details of the reference numbers and direction of test,
j) the date of the test (the time may also be recorded),
k) the test operator,
l) the calculated measurement uncertainty of the test system (ffs).
6 Test equipment
6.1 Light source and power meter
6.1.1 General
Derived fr
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