{"id":408167,"date":"2024-10-20T05:29:20","date_gmt":"2024-10-20T05:29:20","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61280-4-32022\/"},"modified":"2024-10-26T09:58:35","modified_gmt":"2024-10-26T09:58:35","slug":"bs-en-iec-61280-4-32022","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61280-4-32022\/","title":{"rendered":"BS EN IEC 61280-4-3:2022"},"content":{"rendered":"<p>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<strong>.<\/strong> This document specifies two methods for measuring the attenuation before activation of the PON: <\/p>\n<ul>\n<li>method A: one-cord method using a light source and a power meter (LSPM);<\/li>\n<li>method B: optical time-domain reflectometer (OTDR) method in upstream direction only, with reduction of uncertainties due to the variation of backscatter coefficient.<\/li>\n<\/ul>\n<p>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 &#8220;Supplemental Data&#8221; 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.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>undefined  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>Annex ZA (normative)Normative references to international publicationswith their corresponding European publications  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>English <br \/> CONTENTS  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>FOREWORD  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>INTRODUCTION  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>1 Scope <br \/> 2 Normative references  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>3 Terms, definitions, and abbreviated terms <br \/> 3.1 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>3.2 Abbreviated terms   <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>4 Basic PON architecture <br \/> 5 Attenuation measurement <br \/> 5.1 General <br \/> Figures <br \/> Figure 1 \u2013 Single stage conventional ODN structure   <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>5.2 Methods <br \/> 5.3 Cabling configurations <br \/> 5.4 RTM for attenuation measurement <br \/> 6 Apparatus for attenuation measurement <br \/> 6.1 General <br \/> Figure 2 \u2013 Cabling configuration \u2013 Start and end of measuredlosses in reference test method  <\/td>\n<\/tr>\n<tr>\n<td><b>23<b><\/td>\n<td>6.2 Light source <br \/> 6.2.1 Stability <br \/> 6.2.2 Light source spectral characteristics <br \/> 6.3 Launch cord <br \/> 6.4 Receive or tail cord <br \/> Tables <br \/> Table 1 \u2013 Light source spectral requirements  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>6.5 Power meter \u2013 LSPM method only <br \/> 6.6 OTDR apparatus <br \/> 6.6.1 General <br \/> 6.6.2 OTDR spectral characteristics <br \/> Figure 3 \u2013 Typical OTDR schematic  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>6.7 Connector end face cleaning and inspection equipment <br \/> 7 Overview of uncertainties <br \/> 7.1 General <br \/> 7.2 Typical uncertainty values for method A <br \/> Table 2 \u2013 OTDR spectral requirements  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>7.3 Typical uncertainty values for method B <br \/> Table 3 \u2013 Uncertainty for a given attenuation at 1 310 nmand 1 550 nm using the same photodetector <br \/> Table 4 \u2013 Uncertainty for a given attenuation at 1 310 nmand 1 550 nm using different photodetectors  <\/td>\n<\/tr>\n<tr>\n<td><b>27<b><\/td>\n<td>8 Optical return loss measurements <br \/> 8.1 General <br \/> 8.2 ORL measurements using CW <br \/> 8.3 Reflectance measurement using an OTDR <br \/> Table 5 \u2013 Uncertainty for a given attenuation at 1 310 nm and 1 550 nm using OTDR  <\/td>\n<\/tr>\n<tr>\n<td><b>28<b><\/td>\n<td>Annex A (normative)LSPM one-cord reference method <br \/> A.1 Applicability of test method <br \/> A.2 Apparatus <br \/> A.3 Procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>A.4 Calculation <br \/> A.5 Components of reported attenuation <br \/> Figure A.1 \u2013 One-cord reference measurement <br \/> Figure A.2 \u2013 One-cord test measurement  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>Annex B (normative)Optical time-domain reflectometer method <br \/> B.1 Applicability of test method <br \/> B.2 Apparatus <br \/> B.2.1 General <br \/> B.2.2 OTDR <br \/> B.2.3 Test cords  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>B.3 Procedure (test method) <br \/> Figure B.1 \u2013 Test measurement for method B  <\/td>\n<\/tr>\n<tr>\n<td><b>32<b><\/td>\n<td>B.4 Calculation of attenuation <br \/> B.4.1 General <br \/> B.4.2 Connection location <br \/> Figure B.2 \u2013 Location of the connector ports of the cabling under test  <\/td>\n<\/tr>\n<tr>\n<td><b>33<b><\/td>\n<td>B.4.3 Definition of the power levels F1 and F2 <br \/> B.5 Testing launch and tail cords <br \/> B.5.1 General <br \/> Figure B.3 \u2013 Graphic determination of F1 and F2  <\/td>\n<\/tr>\n<tr>\n<td><b>34<b><\/td>\n<td>B.5.2 Launch and tail cords test procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>35<b><\/td>\n<td>Annex C (informative)Filtered optical time-domain reflectometer <br \/> C.1 General <br \/> C.2 Applicability of the method <br \/> C.3 Apparatus <br \/> C.3.1 FOTDR <br \/> C.3.2 Test cords  <\/td>\n<\/tr>\n<tr>\n<td><b>36<b><\/td>\n<td>C.4 Test method <br \/> C.5 Calculation of attenuation <br \/> C.5.1 General <br \/> Figure C.1 \u2013 Location of the connector ports of the cabling under test  <\/td>\n<\/tr>\n<tr>\n<td><b>37<b><\/td>\n<td>C.5.2 Connection location <br \/> C.5.3 Definition of the power levels F1 and F2  <\/td>\n<\/tr>\n<tr>\n<td><b>38<b><\/td>\n<td>C.6 Uncertainties <br \/> Figure C.2 \u2013 Graphic determination of F1 and F2  <\/td>\n<\/tr>\n<tr>\n<td><b>39<b><\/td>\n<td>C.7 Consideration relative to the measurement of an unused branch of theODN while at least one branch is active <br \/> C.7.1 Context <br \/> C.7.2 Evaluation of the risk of perturbation of the network <br \/> Figure C.3 \u2013 OLT structure and signal wavelengths <br \/> Table C.1 \u2013 Uncertainty for a given attenuation at 1 625 nm and 1 650 nm using OTDR  <\/td>\n<\/tr>\n<tr>\n<td><b>40<b><\/td>\n<td>Figure C.4 \u2013 WDM filter response  <\/td>\n<\/tr>\n<tr>\n<td><b>41<b><\/td>\n<td>Annex D (informative)PON configuration <br \/> D.1 General <br \/> D.2 Basic configuration <br \/> Figure D.1 \u2013 Single stage conventional ODN structure   <\/td>\n<\/tr>\n<tr>\n<td><b>42<b><\/td>\n<td>D.3 Coexistence of different PON systems <br \/> Figure D.2 \u2013 Multiple stage conventional ODN structure  <br \/> Figure D.3 \u2013 Implementation of coexistence PON systems   <\/td>\n<\/tr>\n<tr>\n<td><b>43<b><\/td>\n<td>D.4 Wavelength multiplexing <br \/> Figure D.4 \u2013 Single-stage PtP WDM ODN structure  <\/td>\n<\/tr>\n<tr>\n<td><b>44<b><\/td>\n<td>Figure D.5 \u2013 Multiple-stage PtP WDM ODN structure <br \/> Figure D.6 \u2013 Example of ODN structure for TWDM  <\/td>\n<\/tr>\n<tr>\n<td><b>45<b><\/td>\n<td>Annex E (informative)Basic uncertainty analysis for methods B and C  <br \/> E.1 General <br \/> E.2 Uncertainties due to measuring instrument  <\/td>\n<\/tr>\n<tr>\n<td><b>46<b><\/td>\n<td>E.3 Uncertainties due to the setup <br \/> Table E.1 \u2013 Uncertainties due to measuring instruments <br \/> Table E.2 \u2013 Uncertainties due to the setup  <\/td>\n<\/tr>\n<tr>\n<td><b>47<b><\/td>\n<td>E.4 Uncertainties due to cabling <br \/> E.5 Relative uncertainty arising from the uncertainty of the OTDR wavelength <br \/> E.5.1 Impact of the lack of knowledge of the wavelength of the OTDR <br \/> Table E.3 \u2013 Uncertainties due to cabling  <\/td>\n<\/tr>\n<tr>\n<td><b>48<b><\/td>\n<td>E.5.2 Impact of using wavelength in the U band <br \/> Figure E.1 \u2013 Observed PLC splitter wavelength dependency and mathematical model <br \/> Figure E.2 \u2013 Spectral attenuation  <\/td>\n<\/tr>\n<tr>\n<td><b>49<b><\/td>\n<td>E.6 Relative uncertainty arising from non-linearity of the OTDR <br \/> E.7 Uncertainty arising from OTDR noise <br \/> E.7.1 General <br \/> Table E.4 \u2013 Difference of attenuation coefficient  <\/td>\n<\/tr>\n<tr>\n<td><b>50<b><\/td>\n<td>E.7.2 Linear regression <br \/> Figure E.3 \u2013 Linear regression location for each measurement method  <\/td>\n<\/tr>\n<tr>\n<td><b>51<b><\/td>\n<td>Figure E.4 \u2013 Confidence band of the linear regression  <\/td>\n<\/tr>\n<tr>\n<td><b>52<b><\/td>\n<td>E.7.3 Practical determination of uncertainty arising from OTDR noise <br \/> E.7.3.1 Determination of horizontal parameters <br \/> E.7.3.2 Determination of noise parameters <br \/> Figure E.5 \u2013 OTDR trace and noise  <\/td>\n<\/tr>\n<tr>\n<td><b>54<b><\/td>\n<td>E.7.3.3 Asymmetrical noise and measurement validity limits <br \/> Figure E.6 \u2013 Noise asymmetry function of DM  <\/td>\n<\/tr>\n<tr>\n<td><b>55<b><\/td>\n<td>E.8 Relative uncertainty arising from OTDR cursor placement <br \/> E.9 Considerations on backscatter coefficient <br \/> Figure E.7 \u2013 Measurement validity limits  <\/td>\n<\/tr>\n<tr>\n<td><b>56<b><\/td>\n<td>E.10 Sensitivity coefficients <br \/> E.10.1 General <br \/> E.10.2 Sensitivity coefficients values  <\/td>\n<\/tr>\n<tr>\n<td><b>57<b><\/td>\n<td>E.10.3 Sensitivity for relative uncertainty arising from OTDR noise (tail regression) <br \/> Table E.5 \u2013 Sensitivity coefficients  <\/td>\n<\/tr>\n<tr>\n<td><b>58<b><\/td>\n<td>Figure E.8 \u2013 Graphic representation of the amplification of the confidence interval  <\/td>\n<\/tr>\n<tr>\n<td><b>59<b><\/td>\n<td>Annex F (informative) OTDR configuration information <br \/> F.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>60<b><\/td>\n<td>F.2 Fundamental parameters that define the operational capability of an OTDR <br \/> F.2.1 Dynamic range <br \/> F.2.2 Dynamic margin <br \/> F.2.3 Pulse width <br \/> F.2.4 Averaging time <br \/> F.2.5 Dead zone  <\/td>\n<\/tr>\n<tr>\n<td><b>61<b><\/td>\n<td>F.2.6 Distance sampling  <\/td>\n<\/tr>\n<tr>\n<td><b>62<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Fibre optic communication subsystem test procedures &#8211; Installed passive optical networks. Attenuation and optical return loss measurements<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2022<\/td>\n<td>64<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":408177,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-408167","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/408167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/408177"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=408167"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=408167"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=408167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}