🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN IEC 61280-4-3:2022

BS EN IEC 61280-4-3:2022

$198.66

Fibre optic communication subsystem test procedures – Installed passive optical networks. Attenuation and optical return loss measurements

Published By Publication Date Number of Pages
BSI 2022 64
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

IEC 61280-4-3: 2022 describes the measurement of attenuation, optical return loss and optical power in installed passive optical networks (PONs) using single-mode fibre. This document specifies two methods for measuring the attenuation before activation of the PON:

  • method A: one-cord method using a light source and a power meter (LSPM);
  • method B: optical time-domain reflectometer (OTDR) method in upstream direction only, with reduction of uncertainties due to the variation of backscatter coefficient.

In addition, method C, which is described in informative Annex C, provides an estimate of the attenuation after partial activation of the PON by using a U band filtered optical time-domain reflectometer (FOTDR) in an upstream direction. This publication contains an attached file titled “Supplemental Data” in the form of an Excel spread sheet. This file is intended to be used as a complement and does not form an integral part of the standard.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
10 English
CONTENTS
14 FOREWORD
16 INTRODUCTION
17 1 Scope
2 Normative references
18 3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
20 3.2 Abbreviated terms
21 4 Basic PON architecture
5 Attenuation measurement
5.1 General
Figures
Figure 1 – Single stage conventional ODN structure
22 5.2 Methods
5.3 Cabling configurations
5.4 RTM for attenuation measurement
6 Apparatus for attenuation measurement
6.1 General
Figure 2 – Cabling configuration – Start and end of measuredlosses in reference test method
23 6.2 Light source
6.2.1 Stability
6.2.2 Light source spectral characteristics
6.3 Launch cord
6.4 Receive or tail cord
Tables
Table 1 – Light source spectral requirements
24 6.5 Power meter – LSPM method only
6.6 OTDR apparatus
6.6.1 General
6.6.2 OTDR spectral characteristics
Figure 3 – Typical OTDR schematic
25 6.7 Connector end face cleaning and inspection equipment
7 Overview of uncertainties
7.1 General
7.2 Typical uncertainty values for method A
Table 2 – OTDR spectral requirements
26 7.3 Typical uncertainty values for method B
Table 3 – Uncertainty for a given attenuation at 1 310 nmand 1 550 nm using the same photodetector
Table 4 – Uncertainty for a given attenuation at 1 310 nmand 1 550 nm using different photodetectors
27 8 Optical return loss measurements
8.1 General
8.2 ORL measurements using CW
8.3 Reflectance measurement using an OTDR
Table 5 – Uncertainty for a given attenuation at 1 310 nm and 1 550 nm using OTDR
28 Annex A (normative)LSPM one-cord reference method
A.1 Applicability of test method
A.2 Apparatus
A.3 Procedure
29 A.4 Calculation
A.5 Components of reported attenuation
Figure A.1 – One-cord reference measurement
Figure A.2 – One-cord test measurement
30 Annex B (normative)Optical time-domain reflectometer method
B.1 Applicability of test method
B.2 Apparatus
B.2.1 General
B.2.2 OTDR
B.2.3 Test cords
31 B.3 Procedure (test method)
Figure B.1 – Test measurement for method B
32 B.4 Calculation of attenuation
B.4.1 General
B.4.2 Connection location
Figure B.2 – Location of the connector ports of the cabling under test
33 B.4.3 Definition of the power levels F1 and F2
B.5 Testing launch and tail cords
B.5.1 General
Figure B.3 – Graphic determination of F1 and F2
34 B.5.2 Launch and tail cords test procedure
35 Annex C (informative)Filtered optical time-domain reflectometer
C.1 General
C.2 Applicability of the method
C.3 Apparatus
C.3.1 FOTDR
C.3.2 Test cords
36 C.4 Test method
C.5 Calculation of attenuation
C.5.1 General
Figure C.1 – Location of the connector ports of the cabling under test
37 C.5.2 Connection location
C.5.3 Definition of the power levels F1 and F2
38 C.6 Uncertainties
Figure C.2 – Graphic determination of F1 and F2
39 C.7 Consideration relative to the measurement of an unused branch of theODN while at least one branch is active
C.7.1 Context
C.7.2 Evaluation of the risk of perturbation of the network
Figure C.3 – OLT structure and signal wavelengths
Table C.1 – Uncertainty for a given attenuation at 1 625 nm and 1 650 nm using OTDR
40 Figure C.4 – WDM filter response
41 Annex D (informative)PON configuration
D.1 General
D.2 Basic configuration
Figure D.1 – Single stage conventional ODN structure
42 D.3 Coexistence of different PON systems
Figure D.2 – Multiple stage conventional ODN structure
Figure D.3 – Implementation of coexistence PON systems
43 D.4 Wavelength multiplexing
Figure D.4 – Single-stage PtP WDM ODN structure
44 Figure D.5 – Multiple-stage PtP WDM ODN structure
Figure D.6 – Example of ODN structure for TWDM
45 Annex E (informative)Basic uncertainty analysis for methods B and C
E.1 General
E.2 Uncertainties due to measuring instrument
46 E.3 Uncertainties due to the setup
Table E.1 – Uncertainties due to measuring instruments
Table E.2 – Uncertainties due to the setup
47 E.4 Uncertainties due to cabling
E.5 Relative uncertainty arising from the uncertainty of the OTDR wavelength
E.5.1 Impact of the lack of knowledge of the wavelength of the OTDR
Table E.3 – Uncertainties due to cabling
48 E.5.2 Impact of using wavelength in the U band
Figure E.1 – Observed PLC splitter wavelength dependency and mathematical model
Figure E.2 – Spectral attenuation
49 E.6 Relative uncertainty arising from non-linearity of the OTDR
E.7 Uncertainty arising from OTDR noise
E.7.1 General
Table E.4 – Difference of attenuation coefficient
50 E.7.2 Linear regression
Figure E.3 – Linear regression location for each measurement method
51 Figure E.4 – Confidence band of the linear regression
52 E.7.3 Practical determination of uncertainty arising from OTDR noise
E.7.3.1 Determination of horizontal parameters
E.7.3.2 Determination of noise parameters
Figure E.5 – OTDR trace and noise
54 E.7.3.3 Asymmetrical noise and measurement validity limits
Figure E.6 – Noise asymmetry function of DM
55 E.8 Relative uncertainty arising from OTDR cursor placement
E.9 Considerations on backscatter coefficient
Figure E.7 – Measurement validity limits
56 E.10 Sensitivity coefficients
E.10.1 General
E.10.2 Sensitivity coefficients values
57 E.10.3 Sensitivity for relative uncertainty arising from OTDR noise (tail regression)
Table E.5 – Sensitivity coefficients
58 Figure E.8 – Graphic representation of the amplification of the confidence interval
59 Annex F (informative) OTDR configuration information
F.1 General
60 F.2 Fundamental parameters that define the operational capability of an OTDR
F.2.1 Dynamic range
F.2.2 Dynamic margin
F.2.3 Pulse width
F.2.4 Averaging time
F.2.5 Dead zone
61 F.2.6 Distance sampling
62 Bibliography

Related products

BS EN IEC 61280-4-3:2022
$198.66