IEC 62150-3:2015

IEC 62150-3 ®
Edition 2.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic active components and devices –
Test and measurement procedures –
Part 3: Optical power variation induced by mechanical disturbance
in optical receptacles and transceiver interfaces–

Composants et dispositifs actifs fibroniques –
Procédures d’essais et de mesures –
Partie 3: Variation de puissance optique induite par des perturbations
mécaniques dans les interfaces d'embases et d'émetteurs-récepteurs optiques

IEC 62150-3: 2015-05 (en-fr)
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IEC 62150-3 ®
Edition 2.0 2015-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic active components and devices –

Test and measurement procedures –

Part 3: Optical power variation induced by mechanical disturbance

in optical receptacles and transceiver interfaces–

Composants et dispositifs actifs fibroniques –

Procédures d’essais et de mesures –

Partie 3: Variation de puissance optique induite par des perturbations

mécaniques dans les interfaces d'embases et d'émetteurs-récepteurs optiques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-7179-7

– 2 – IEC 62150-3:2015 © IEC 2015
CONTENTS
CONTENTS . 2
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 Measurement consideration . 7
4.1 Multiple test methods . 7
4.2 Two wiggle loss mechanisms . 7
4.2.1 Rationale for two different wiggle loss test methods . 7
4.2.2 Case A: Point of action for the ferrule . 7
4.2.3 Case B: Point of action for the plug housing . 8
5 Test Method A . 8
5.1 Apparatus . 8
5.1.1 General . 8
5.1.2 Test cord . 8
5.1.3 Power meter . 8
5.1.4 Test load . 8
5.2 Test procedures for Tx interfaces . 8
5.2.1 Test procedures . 8
5.2.2 Set-up . 9
5.2.3 Initial measurement . 9
5.2.4 Apply load and rotate . 9
5.2.5 Wiggle loss . 9
5.3 Test procedures for Rx interfaces and optical receptors . 10
5.3.1 Test procedures . 10
5.3.2 LOS indicator method . 10
5.3.3 Receiver optical power monitor method . 10
6 Test Method B . 11
6.1 Apparatus . 11
6.1.1 General . 11
6.1.2 Test fixture and rotation mechanism . 11
6.1.3 Test cord . 11
6.1.4 Power meter . 11
6.1.5 Test load . 11
6.2 Test procedures for Tx interfaces . 11
6.2.1 Test procedures . 11
6.2.2 Set-up . 11
6.2.3 Initial measurement . 12
6.2.4 Apply load . 12
6.2.5 Measurement . 12
6.2.6 Wiggle loss . 12
6.3 Test procedures for Rx interfaces and optical receptors . 12
6.3.1 Test procedures . 12
6.3.2 LOS-indicator method . 13

6.3.3 Receiver optical power monitor method . 13
7 Test results . 13
Annex A (normative) Load requirements . 15
A.1 Loads for Method A . 15
A.2 Loads for Method B . 15
Annex B (normative) Summary of test conditions . 16
Annex C (normative) Characteristics of the test cord . 17
Annex D (normative) Floating tolerance . 20
Annex E (informative) Load value difference for connector type in Method A . 21
Bibliography . 22

Figure 1 – Equipment setup of Method A for Tx interfaces . 9
Figure 2 – Equipment set-up of Method A for Rx interfaces and optical receptors . 10
Figure 3 – Equipment set-up of Method B for Tx interfaces . 12
Figure 4 – Equipment set-up of Method B for Rx interface and optical receptors . 13
Figure C.1 – Wiggle test cord interface (LC connector) . 17
Figure C.2 – Wiggle test cord interface (SC connector) . 18
Figure D.1 – Floating tolerance . 20
Figure E.1 – Floating tolerance . 21

Table 1 – Multiple test methods . 7
Table A.1 – Method A: Loads applied for devices using connector cords with 1,25 mm
ferrule and 2,5 mm ferrule . 15
Table A.2 – Method B: Loads applied for devices using connector cords with 1,25 mm
ferrule and 2,5 mm ferrule . 15
Table B.1 – Summary of test conditions for Method A (normative) . 16
Table B.2 – Summary of test conditions for Method B (normative) . 16
Table C.1 – Wiggle test cord specification (LC connector) . 17
Table C.2 – Dimensions of the wiggle test cord interface . 18
Table C.3 – Wiggle test cord specification (SC connector) . 18
Table C.4 – Dimensions of the wiggle test cord interface . 19

– 4 – IEC 62150-3:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
TEST AND MEASUREMENT PROCEDURES –

Part 3: Optical power variation induced by mechanical
disturbance in optical receptacles and transceiver interfaces

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-governmental organizations liaising
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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interested IEC National Committees.
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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 62150-3 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 2012 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– extension of application field to SC connector interface transceivers in addition to LC
connector interface transceivers specified in the first edition as both transceiver interfaces
are very important in the industry;
– addition of a new Annex E dealing with load value difference for connector type in Method A.
This bilingual version (2019-07) corresponds to the monolingual English version, published in
2015-05.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/1311/FDIS 86C/1330/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.
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 62150 series, published under the general title Fibre optic active
components and devices – Test and measurement procedures, 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.
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.

– 6 – IEC 62150-3:2015 © IEC 2015
FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
TEST AND MEASUREMENT PROCEDURES –

Part 3: Optical power variation induced by mechanical
disturbance in optical receptacles and transceiver interfaces

1 Scope
It has been found that some optical transceivers and receptacles are susceptible to fibre optic
cable induced stress when side forces are applied to the mated cable-connector assembly,
resulting in variations in the transmitted optical power. The purpose of this part of IEC 62150 is
to define physical stress tests to ensure that such optical connections (cable and receptacle)
can continue to function within specifications.
This standard specifies the test requirements and procedures for qualifying optical devices for
sensitivity to coupled power variations induced by mechanical disturbance at the optical ports
of the device.
This standard applies to active devices with optical receptacle interfaces.
This standard describes the testing of transceivers for use with single-mode connectors having
either 2,5 mm or 1,25 mm ferrules.
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 61753 (all parts), Fibre optic interconnecting devices and passive components performance
standard
IEC 61753-021-6, Fibre optic interconnecting devices and passive components performance
standard – Part 021-6: Grade B/2 single-mode fibre optic connectors for category O –
Uncontrolled environment
IEC 61754 (all parts), Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
wiggle
mechanical disturbances that induce coupled optical power variation in the optical receptacle
and transceiver interface
3.1.2
wiggle loss
variation in coupled output power (with respect to a no-load, non-rotated measurement) induced
in an optical module or receptacle when the mated connector is laterally stressed
3.2 Abbreviations
DUT device under test
LOS loss of signal
Rx receiver
Tx transmitter
4 Measurement consideration
4.1 Multiple test methods
Since the wiggle loss mechanisms are categorized into two different cases, Case A and B, this
standard defines two measurement methods, Method A and B, as shown in Table 1. Method A
and B are applicable to the tests for the mechanical endurance of transceivers under wiggle
Case A and B, respectively.
Table 1 – Multiple test methods
Test Applicable to Example of parameters to be included
methods
Method A Wiggle Case A: test for optical transceivers use Test procedure, test fixture, test jumper, test
with patchcord terminated to connectors which load
meet interface standards (IEC 61754 series)
Method B Wiggle Case B: test for optical transceivers use Test procedure, test fixture, test jumper, test
with patchcord terminated to connectors which load
meet both interface standards (IEC 61754
series) and performance standards (IEC 61753
series)
4.2 Two wiggle loss mechanisms
4.2.1 Rationale for two different wiggle loss test methods
Some optical transceivers and receptacles are susceptible to fibre optic cable induced stress
when forces are applied to the mated cable-connector assembly. Depending on the structure of
fibre-optic connectors, two different points of action for the receptacle cause two different types
of wiggle loss.
The intention of Method A is to help ensure that the transceiver port design is robust enough to
work with a variety of cables that meet interface standards available in the field. The intention
of Method B is to ensure port designs are robust enough to endure potential side loads during
operation and installation with cables of known performance.
To guarantee the mechanical robustness of optical transceivers both Methods A and B or either
Method A or B shall be chosen as appropriate.
4.2.2 Case A: Point of action for the ferrule
When the ferrule floating tolerance is insufficient (see Annex D), external side forces applied to
the patchcord can cause deformation of the sleeve of the receptacle caused by the ferrule
bending moment. This causes variations in the transmitted optical power of transceivers. In this
case, the mechanical robustness of transceivers depends on the sleeve, receptacle port, and
optical sub-assembly design. There are also some patchcords which have insufficient ferrule
floating tolerance, as this is not specified in interface standards.

– 8 – IEC 62150-3:2015 © IEC 2015
4.2.3 Case B: Point of action for the plug housing
When the ferrule floating tolerance is sufficient, external forces applied to the patchcord cause
deformation of the receptacle housing caused by the plug bending moment. This causes
variations in the transmitted optical power of transceivers. In this case, the mechanical
endurance of transceivers depends on the design of the receptacle housings. Sufficient ferrule
floating tolerance can be guaranteed by patchcord performance standards as specified in Annex
C, Method B.
5 Test Method A
5.1 Apparatus
5.1.1 General
An example of the test apparatus is shown in Figure 1. Details of the elements are given in the
following subclauses. Measurement wavelength is in accordance with the wavelength of
transceiver specifications, and the test data is obtained at room temperature.
The exact details of the test fixture will depend on the type of DUT. For example, if an optical
transceiver is being evaluated, a test board capable of securing and powering up the transceiver
may be used. In this case, it is centre-mounted to the spindle of a rotation mechanism so that
it can be rotated symmetrically over 360°.
5.1.2 Test cord
In order to simulate the wiggle loss mechanism of Case A, specially designed test patchcords
called simulated wiggle test cords are used in Method A. Detail specifications of the simulated
wiggle test cord are defined in Annex C.
In Figure 1, the test cord is connected to the transceiver under test. The test jumper has a
weight applied to the end of the test cord to stress the connection to the DUT. The test cord is
connected to a power meter at the other end to record the transmitted power variations.
5.1.3 Power meter
The power meter is used to measure variations in the coupled power from the DUT. It is set-up
to record the maximum peak-to-peak excursions in power level normalized around the initial
no-load measurement. In the case of Test Method A, the following measurement set-up is
recommended. Both the rotation mechanism (e.g. stepper motor) and power meter are
interfaced to a computer for control and data logging purposes. Ideally, the controller software
can manipulate the direction of rotation, speed and step increments of the stepper motor. During
the 360° continuous rotation, the instrumentation should be capable of collecting at least one
data point for every 2,5 degrees of rotation, which equates to a response time of better than
100 ms for the measuring instrumentation.
5.1.4 Test load
The test load or weight should be applied to the end of the test cord. The test load is defined in
Annex A.
5.2 Test procedures for Tx interfaces
5.2.1 Test procedures
The test is conducted with a suitable fixture, as illustrated in Figure 1. (Figure 1 is an example
of the case using a 1,25 mm ferrule connector.) This example utilizes an optical transceiver (Tx)
port or other connectorized optical source. The simulated wiggle test cord (fibre cord and
connector) is flexed at the point of entry to the connector on the DUT by applying a load in the
form of a weight to the fibre while rotating the test fixture. The test is conducted as follows.

5.2.2 Set-up
Mount the connector/optical assembly as shown in Figure 1 and connect the simulated wiggle
test cord from the device output port/Tx port to the power meter. If the DUT contains more than
one port (for example a Tx port and an Rx port in the case of a transceiver), only one port
should be analysed at a time. Hence, only a single simulated wiggle test cord should be
connected to the device at any given time.
5.2.3 Initial measurement
Without applying any load and without rotating the fixture, measure and record the output power
of the DUT when mounted in the fixture. The power meter should be reset at this point so that
all measurements are normalized around this output level.
5.2.4 Apply load and rotate
Apply the appropriate load to the simulated wiggle test cord as shown in Figure 1.
The fixture/DUT to which the load is attached shall rotate both clockwise and anticlockwise.
Allow for a settling time of 10 s after the load is attached or disturbed and before and after each
rotation.
With a 360° rotation at a speed of 4 r/min (or less), record the power meter readings after the
clockwise and anticlockwise rotations have completed.
5.2.5 Wiggle loss
The wiggle loss is defined as the maximum peak-to-peak delta of the measured power during
the loading process of 5.2.4, including the initial measurement value of 5.2.3.
Stepper motor
Test fixture
Motor control
Load DUT
Load
−5,67 dBm
Power meter
Test jumper
IEC
NOTE The details of the loading point are described in Annex C.
Figure 1 – Equipment setup of Method A for Tx interfaces

– 10 – IEC 62150-3:2015 © IEC 2015
5.3 Test procedures for Rx interfaces and optical receptors
5.3.1 Test procedures
In the case of Rx interfaces or optical receptors (for example a transceiver Rx connector test
or where the DUT does not contain a light source), the DUT is mounted in a test fixture as
shown in Figure 2, with one of the following test methods applied. (Figure 2 is an example of
the case using a 1,25 mm ferrule connector.)
5.3.2 LOS indicator method
The procedure is as follows:
a) adjust the input power to the receptacle to find the LOS threshold;
b) increase the input power by 1,5 dB;
c) apply the relevant load specified in Table A.1 and rotate the test fixture from 0° to 360° with
continuous motion in clockwise and anticlockwise directions;
d) if LOS is detected, then the device fails the test; if no LOS is detected, the device passes.
5.3.3 Receiver optical power monitor method
The receiver optical power monitor method can be implemented on transceivers or other optical
receptors that support digital diagnostic monitoring. The robustness of the optical port to wiggle
is determined by monitoring changes in the received optical power reported by the digital
diagnostics. The procedure is as follows:
a) set the input power to the receiver to a level at which the receiver power monitor is in its
most accurate range;
b) apply the relevant load specified in Table A.1 and rotate the test fixture from 0° to 360° with
continuous motion in clockwise and anticlockwise directions while monitoring the digital
diagnostics for receiver optical power;
c) record the maximum change in receiver optical power in dB; wiggle loss is defined as the
maximum peak-to-peak delta of the measured power during the measurement from a)
through b).
Stepper motor
Test fixture
Motor control
Load DUT
Load
−5,67 dBm
Attenuator
Test jumper Light source
IEC
NOTE The details of the loading point are described in Annex C.
Figure 2 – Equipment set-up of Method A for Rx interfaces and optical receptors

6 Test Method B
6.1 Apparatus
6.1.1 General
An example of the test apparatus is shown in Figure 3. Details of the elements are given in the
following subclauses. Measurement wavelength is in accordance with the wavelength of
transceiver specifications, and the test data is obtained at room temperature.
6.1.2 Test fixture and rotation mechanism
The exact details of the test fixture will depend on the type of DUT. For example, if an optical
transceiver is being evaluated, a test board capable of securing and powering up the transceiver
may be used. In this case, it is centre-mounted to the spindle of a rotation mechanism so that
it can be rotated symmetrically over 360°. In Test Method B, the rotation function is not
absolutely necessary if the test fixture enables measurement at every 90° interval around the
spindle (0°, 90°, 180°, 270°).
6.1.3 Test cord
In order to simulate the wiggle loss mechanism of Case B, normal patchcords which satisfy both
interface standards (see IEC 61754 series) and performance standards (see IEC 61753 series)
are used in Method B.
In Figure 3, the test cord is connected to the transceiver under test. The test jumper has a
weight applied to the end of test cord to stress the connection to the DUT. The test cord is
connected to a power meter at the other end to record the transmitted power variations.
6.1.4 Power meter
The power meter is used to measure variations in the coupled power from the DUT. It is set-up
to record the maximum peak-to-peak excursions in power level normalized around the initial
no-load measurement.
6.1.5 Test load
The test load or weight shall be applied to the end of the test cord. The test load is defined in
Annex A.
6.2 Test procedures for Tx interfaces
6.2.1 Test procedures
The test is conducted with a suitable fixture, as illustrated in Figure 3 (Figure 3 is an example
of the case using a 1,25mm ferrule connector.) This example utilizes an optical transceiver (Tx)
port or other connectorized optical source. The standard test cord (fibre cord and connector) is
flexed at the point of entry to the connector on the DUT by applying a load in the form of a
weight to the fibre while rotating the test fixture. The continuous rotation mechanism is not
absolutely necessary if the test fixture enables measurement at each of the 90° directions
around the spindle (0°, 90°, 180°, 270°). The test is conducted as follows.
6.2.2 Set-up
Mount the connector/optical assembly as shown in Figure 3 and connect a standard test cord
from the device output port/Tx port to the power meter. If the DUT contains more than one port
(for example, a Tx port and an Rx port in the case of a transceiver), only one port should be
analysed at a time. Hence, only a single standard test cord should be connected to the device
at any given time.
– 12 – IEC 62150-3:2015 © IEC 2015
6.2.3 Initial measurement
Without applying any load and without rotating the fixture, measure and record the output power
of the DUT when mounted in the fixture. The power meter should be reset at this point so that
all measurements are normalized around this output level.
6.2.4 Apply load
Apply the appropriate load as specified in Table A.2 to the standard test cord as shown in Figure
3.
6.2.5 Measurement
Record the power meter after the positioning of four angular directions (0°, 90°, 18°, 270°) has
completed.
6.2.6 Wiggle loss
The wiggle loss is defined as the maximum peak-to-peak delta of the measured power during
the measurement of 6.2.5 including the initial measurement value of 6.2.3.
Stepper motor
0°
Test fixture
Motor control
90°
−5,67 dBm
Load
Power meter
180°
Test jumper
270°
IEC
Figure 3 – Equipment set-up of Method B for Tx interfaces
6.3 Test procedures for Rx interfaces and optical receptors
6.3.1 Test procedures
In the case of Rx interfaces or optical receptors (for example, a transceiver Rx connector test
or where the DUT does not contain a light source), the DUT is mounted in a test fixture as
shown in Figure 4, and one of the following test methods is applied. (Figure 4 is an example of
the case using a 1,25 mm ferrule.)

6.3.2 LOS-indicator method
The procedure is as follows:
a) adjust the input power to the receptacle to find the LOS threshold;
b) increase the input power by 1,5 dB;
c) apply the relevant load specified in Table A.2 and rotate the test fixture at angles of 0°, 90°,
180° and 270°;
d) if LOS is detected, then the device fails the test. If no LOS is detected, the device passes.
6.3.3 Receiver optical power monitor method
The receiver optical power monitor method can be implemented on transceivers or other optical
receptors that support digital diagnostic monitoring. The robustness of the optical port to wiggle
is determined by monitoring changes in the received optical power reported by the digital
diagnostics.
a) set the input power to the receiver to a level at which the receiver power monitor is in its
most accurate range;
b) apply the relevant load specified in Table A.2 and rotate the test fixture at angles of 0°, 90°,
180° and 270° while monitoring the digital diagnostics for receiver optical power;
c) record the maximum change in receiver optical power in dB. Wiggle loss is defined as the
maximum peak-to-peak delta of the measured power during the measurement from a) to b).
Stepper motor
0°
Test fixture
Motor control
90°
Load −5,67 dBm
Attenuator
180°
Test jumper
Light source
270°
IEC
Figure 4 – Equipment set-up of Method B for Rx interface and optical receptors
7 Test results
The test results shall provide the following details:
a) The method used (Method A and/or Method B)
b) The load value
c) Wiggle loss
– 14 – IEC 62150-3:2015 © IEC 2015
d) Pass or fail
e) Receiver optical power variation
f) Sample size
g) Number of cords
Annex A
(normative)
Load requirements
See Table A.1 and Table A.2.
A.1 Loads for Method A
Table A.1 – Method A: Loads applied for devices using
connector cords with 1,25 mm ferrule and 2,5 mm ferrule
Connector type Load Angles
N °
LC 1,5 0 to 360
SC 0,5 0 to 360
A.2 Loads for Method B
Table A.2 – Method B: Loads applied for devices using
connector cords with 1,25 mm ferrule and 2,5 mm ferrule
Connector type Load Angles
N °
LC 4,5 0, 90, 180, 270
SC 4,5 0, 90, 180, 270
– 16 – IEC 62150-3:2015 © IEC 2015
Annex B
(normative)
Summary of test conditions
See Table B.1 and Table B.2.
Table B.1 – Summary of test conditions for Method A (normative)
Connector Port Measurement Load Sample Number Failures
Test cord Pass/fail criteria
style (Rx/Tx) parameters N size of cords allowed
Max wiggle loss
Tx Tx power
<1,5 dB
LC
Depends on
(single- Clause C.1 1,5 11 5 0
method used: no
LOS power delta
mode)
Rx LOS or received
or bit errors
power delta
<1,5 dB
Max wiggle loss
Tx Tx power
<1,5 dB
SC
Depends on
(single- Clause C.2 0,5 11 5 0
method used: no
LOS power delta
mode)
Rx LOS or received
or bit errors
power delta
<1,5 dB
Table B.2 – Summary of test conditions for Method B (normative)
Connector Port Measurement Load Sample Number Failures
Test cord Pass/fail criteria
style (Rx/Tx) parameters N size of cords allowed
Max wiggle loss
Tx Tx power
<1,5 dB
LC
Depends on
(single- Clause C.1 4,5 11 5 0
method used: no
LOS,power delta
mode)
Rx LOS or received
or bit errors
power delta
<1,5 dB
Max wiggle loss
Tx Tx power
<1,5 dB
SC
Depends on
(single- Clause C.2 4,5 11 5 0
method used: no
LOS power delta
mode)
LOS or received
Rx
or bit errors
power delta
<1,5 dB
Annex C
(normative)
Characteristics of the test cord
See Figure C.1, Figure C.2, Table C.1, Table C.2, Table C.3 and Table C.4.
Table C.1 – Wiggle test cord specification (LC connector)
Test method Specifications for wiggle test cord
Method A The details of this test cord are in Figure C.1 and Table C.2
Method B (standard test cord) IEC 61753-021-6
IEC
Figure C.1 – Wiggle test cord interface (LC connector)

– 18 – IEC 62150-3:2015 © IEC 2015
Table C.2 – Dimensions of the wiggle test cord interface
Dimensions
Reference Notes
Minimum Maximum
A 1,49 mm 1,51 mm
B 1,89 mm 1,91 mm
C 26,85 mm 27,05 mm
D 10,3 mm 10,5 mm
E 12,97 mm 13,17 mm
F 2,35 mm 2,45 mm
G 7,03 mm 7,23 mm
H 7,46 mm 7,54 mm
I 7,76 mm 7,84 mm
J 21,9 mm 22,1 mm
K 0,5 mm 0,7 mm
L 0,2 mm 0,4 mm
M 1,75 mm 1,85 mm
N 2,46 mm 2,54 mm
O 25° 35° Degrees
P 2,46 mm 2,54 mm
Q 0,06 mm 0,14 mm
NOTE The interface dimensions other than those specified in Table C.2 are compliant with IEC 61754-20.

Table C.3 – Wiggle test cord specification (SC connector)
Test method Specifications for wiggle test cord
Method A The details of this test cord are in Figure C.2 and Table C.4
Method B (standard test cord) IEC 61753-021-6

K
L
C
IEC
Figure C.2 – Wiggle test cord interface (SC connector)
A
M
B
Table C.4 – Dimensions of the wiggle test cord interface
Dimensions
mm
Reference Notes
Minimum Maximum
A 1,49 1,51
B 2,8 3,0
C 32,5 33,5
K 0,5 0,7
L 0,4 0,8
M 1,75 1,85
NOTE The interface dimensions other than those specified in Table C.4 are compliant with IEC 61754-4.

– 20 – IEC 62150-3:2015 © IEC 2015
Annex D
(normative)
Floating tolerance
In order to control the loss induced by wiggle, it is necessary to keep the accurate relative
positioning of the ferrule in the housing. This is true even in the case where external housing
deformation is caused by the optical cable bending, as shown in Figure D.1. In this situation,
the ferrule floating mechanism called “floating tolerance” is necessary. The precise dimensions
of this tolerance are not quantified in this standard as they depend upon the design, construction
and materials of both connector and housing.
However, if the floating tolerance is not sufficient, the ferrule comes into contact with housing
as the deformation increases causing wiggle loss. Therefore guaranteeing sufficient floating
tolerance is required by the detailed design of the housing and/or connector in order to meet
the performance requirements of this test method.
Floating tolerance
The ferrule comes into contact with housing
Bending force
IEC
Figure D.1 – Floating tolerance

Annex E
(informative)
Load value difference for connector type in Method A
As specified in Table A.1, there is a specified load value difference in test Method A, depending
on the type of connector. The reason for this difference comes from the effective torque load
difference between the two
...