{"id":425675,"date":"2024-10-20T06:58:05","date_gmt":"2024-10-20T06:58:05","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61280-1-42023\/"},"modified":"2024-10-26T13:08:54","modified_gmt":"2024-10-26T13:08:54","slug":"bs-en-iec-61280-1-42023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61280-1-42023\/","title":{"rendered":"BS EN IEC 61280-1-4:2023"},"content":{"rendered":"

IEC 61280-1-4:2023 is available as IEC 61280-1-4:2023 RLV<\/span> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61280-1-4:2023 establishes the characterization process of the encircled flux measurement method of light sources intended to be used with multimode fibre. This document sets forth a procedure for the collection of two-dimensional fibre optic nearfield greyscale data and subsequent reduction to one-dimensional data expressed as a set of three sampled parametric functions of radius from the fibre\u2019s optical centre. Estimation of the fibre core diameter is not an objective of this document. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – improvement of calibration procedure and calibration traceability; – improvement of fibre shaker description and requirements; – addition of pulsed light sources; – removal of a poorly traceable calibration process using a micro positioner.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nBlank Page <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
11<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
12<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
13<\/td>\n4 Symbols <\/td>\n<\/tr>\n
15<\/td>\n5 Assumptions
5.1 Assumptions applicable to the characterization of data sources
5.2 Assumptions applicable to the characterization of measurement sources
6 Apparatus
6.1 Common apparatus
6.1.1 General
6.1.2 Computer
Figures
Figure 1 \u2013 Apparatus block diagram <\/td>\n<\/tr>\n
16<\/td>\n6.1.3 Image digitizer
6.1.4 Detector
6.1.5 Magnifying optics <\/td>\n<\/tr>\n
17<\/td>\n6.1.6 Attenuator
6.1.7 Micro positioner (optional)
6.1.8 Input port
6.1.9 Calibration light source <\/td>\n<\/tr>\n
18<\/td>\n6.2 Transmission source apparatus
6.2.1 General
6.2.2 Test jumper assembly
6.2.3 Fibre shaker
Figure 2 \u2013 Typical set-up for transmission source measurement <\/td>\n<\/tr>\n
19<\/td>\nFigure 3 \u2013 Fibre shaker example <\/td>\n<\/tr>\n
20<\/td>\n6.3 Measurement source apparatus
7 Sampling and specimens
8 Geometric calibration
9 Measurement procedure
9.1 Safety
9.2 Image acquisition
9.2.1 Raw image acquisition <\/td>\n<\/tr>\n
21<\/td>\n9.2.2 Dark image acquisition
9.2.3 Corrected image
9.3 Optical centre determination
9.3.1 General <\/td>\n<\/tr>\n
22<\/td>\n9.3.2 Centroid image
9.3.3 Centroid computation <\/td>\n<\/tr>\n
23<\/td>\n9.4 Test source image acquisition
10 Computation of encircled flux
10.1 Computation of radial data functions
Figure 4 \u2013 Pixel and ring illustration <\/td>\n<\/tr>\n
25<\/td>\n10.2 Integration limit and baseline determination
10.2.1 Integration limit
10.2.2 Baseline determination
10.2.3 Baseline subtraction <\/td>\n<\/tr>\n
26<\/td>\n10.3 Computation of encircled flux
11 Results
11.1 Information available with each measurement
11.2 Information available upon request <\/td>\n<\/tr>\n
27<\/td>\n12 Specification information <\/td>\n<\/tr>\n
28<\/td>\nAnnex A (informative) Measurement sensitivity considerations
Figure A.1 \u2013 Core images from instrument A and instrument B <\/td>\n<\/tr>\n
29<\/td>\nFigure A.2 \u2013 Compressed core images from instrument A and instrument B
Figure A.3 \u2013 Intensity versus radius for instruments A and B <\/td>\n<\/tr>\n
33<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fibre optic communication subsystem test procedures – General communication subsystems. Light source encircled flux measurement method<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n34<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":425681,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[648,2641],"product_tag":[],"class_list":{"0":"post-425675","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-180-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/425675","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\/425681"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=425675"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=425675"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=425675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}