{"id":372461,"date":"2024-10-20T02:29:24","date_gmt":"2024-10-20T02:29:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61280-2-82021\/"},"modified":"2024-10-26T04:20:36","modified_gmt":"2024-10-26T04:20:36","slug":"bs-en-iec-61280-2-82021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61280-2-82021\/","title":{"rendered":"BS EN IEC 61280-2-8:2021"},"content":{"rendered":"

IEC 61280-2-8:2021 is available as IEC 61280-2-8:2021 RLV<\/span> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61280-2-8:2021 specifies two main methods for the determination of low BER values by making accelerated measurements. These include the variable decision threshold method (Clause 5) and the variable optical threshold method (Clause 6). In addition, a third method, the sinusoidal interference method, is described in Annex B. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – correction of errors in Formula (8) in 5.5.2 and in a related formula in 5.5.3; – correction of errors in the references to clauses, subclauses, figures, procedures, and in the Bibliography; – alignment of the terms and definitions in 3.1 with those in IEC 61281-1.<\/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\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nEuropean foreword
Endorsement notice <\/td>\n<\/tr>\n
5<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
7<\/td>\nFOREWORD <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n3.2 Abbreviated terms
4 Measurement of low bit-error ratios
4.1 General considerations
Tables
Table 1 \u2013 Mean time for the accumulation of 15 errorsas a function of BER and bit rate <\/td>\n<\/tr>\n
11<\/td>\n4.2 Background to Q-factor <\/td>\n<\/tr>\n
12<\/td>\nFigures
Figure 1 \u2013 Sample eye diagram showing patterning effects <\/td>\n<\/tr>\n
13<\/td>\n5 Variable decision threshold method
5.1 Overview
Figure 2 \u2013 More accurate measurement technique using a DSO that samples noise statistics between eye centres <\/td>\n<\/tr>\n
14<\/td>\nFigure 3 \u2013 Bit error ratio as a function of decision threshold level <\/td>\n<\/tr>\n
15<\/td>\nFigure 4 \u2013 Plot of Q-factor as a function of threshold voltage <\/td>\n<\/tr>\n
16<\/td>\n5.2 Apparatus
5.3 Sampling and specimens
5.4 Procedure <\/td>\n<\/tr>\n
17<\/td>\nFigure 5 \u2013 Set-up for the variable decision threshold method
Figure 6 \u2013 Set-up of initial threshold level (approximately at the centre of the eye) <\/td>\n<\/tr>\n
18<\/td>\n5.5 Calculations and interpretation of results
5.5.1 Sets of data <\/td>\n<\/tr>\n
19<\/td>\n5.5.2 Convert BER using inverse error function
Table 2 \u2013 BER as a function of threshold voltage <\/td>\n<\/tr>\n
20<\/td>\n5.5.3 Linear regression
Table 3 \u2013 fi as a function of Di <\/td>\n<\/tr>\n
21<\/td>\n5.5.4 Standard deviation and mean
5.5.5 Optimum decision threshold
5.5.6 BER optimum decision threshold
Table 4 \u2013 Values of linear regression constants
Table 5 \u2013 Mean and standard deviation <\/td>\n<\/tr>\n
22<\/td>\n5.5.7 BER non-optimum decision threshold
5.5.8 Error bound
5.6 Test documentation
5.7 Specification information
6 Variable optical threshold method
6.1 Overview <\/td>\n<\/tr>\n
23<\/td>\n6.2 Apparatus
6.3 Items under test
6.4 Procedure for basic optical link
Figure 7 \u2013 Effect of optical bias <\/td>\n<\/tr>\n
24<\/td>\n6.5 Procedure for self-contained system
Figure 8 \u2013 Set-up for optical link or device test
Figure 9 \u2013 Set-up for system test <\/td>\n<\/tr>\n
25<\/td>\n6.6 Evaluation of results
Table 6 \u2013 Example of optical bias test <\/td>\n<\/tr>\n
26<\/td>\nFigure 10 \u2013 Extrapolation of log BER as a function of bias <\/td>\n<\/tr>\n
27<\/td>\nAnnex A (normative) Calculation of error bound in the value of Q <\/td>\n<\/tr>\n
29<\/td>\nAnnex B (informative) Sinusoidal interference method
B.1 Overview
B.2 Apparatus
B.3 Sampling and specimens <\/td>\n<\/tr>\n
30<\/td>\nB.4 Procedure
B.4.1 Optical sinusoidal interference method
Figure B.1 \u2013 Set-up for the sinusoidal interference method by optical injection <\/td>\n<\/tr>\n
31<\/td>\nB.4.2 Electrical sinusoidal interference method
Table B.1 \u2013 Results for sinusoidal injection <\/td>\n<\/tr>\n
32<\/td>\nB.5 Calculations and interpretation of results
B.5.1 Mathematical analysis
B.5.2 Extrapolation
Figure B.2 \u2013 Set-up for the sinusoidal interference method by electrical injection <\/td>\n<\/tr>\n
33<\/td>\nB.5.3 Expected results
Figure B.3 \u2013 BER result from the sinusoidal interference method (data points and extrapolated line) <\/td>\n<\/tr>\n
34<\/td>\nB.6 Documentation
B.7 Specification information
Figure B.4 \u2013 BER versus optical power for three methods <\/td>\n<\/tr>\n
35<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fibre optic communication subsystem test procedures – Digital systems. Determination of low BER using Q-factor measurements<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":372468,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[649,2641],"product_tag":[],"class_list":{"0":"post-372461","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-180-10","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\/372461","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\/372468"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=372461"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=372461"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=372461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}