This part of IEC 60728 lays down the measuring methods, performance requirements and data publication requirements for active wideband equipment of cable networks for television signals, sound signals and interactive services.<\/p>\n
This standard<\/p>\n
applies to all broadband amplifiers used in cable networks;<\/p>\n<\/li>\n
covers the frequency range 5 MHz to 3 000 MHz;<\/p>\n<\/li>\n<\/ul>\n
\nNOTE The upper limit of 3 000 MHz is an example, but not a strict value. The frequency range, or ranges, over which the equipment is specified, should be published.<\/p>\n<\/blockquote>\n
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applies to one-way and two-way equipment;<\/p>\n<\/li>\n
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lays down the basic methods of measurement of the operational characteristics of the active equipment in order to assess the performance of this equipment;<\/p>\n<\/li>\n
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identifies the performance specifications to be published by the manufacturers;<\/p>\n<\/li>\n
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states the minimum performance requirements of certain parameters.<\/p>\n<\/li>\n<\/ul>\n
Amplifiers are divided into the following two quality levels:<\/p>\n
Practical experience has shown that these types meet most of the technical requirements necessary for supplying a minimum signal quality to the subscribers. This classification is not a requirement but is provided to users and manufacturers for information about minimum quality criteria of the material required to install networks of different sizes. The system operator has to select appropriate material to meet the minimum signal quality at the subscriber\u2019s outlet, and to optimise cost\/performance, taking into account the size of the network and local circumstances.<\/p>\n
All requirements and published data are understood as guaranteed values within the specified frequency range and in well-matched conditions.<\/p>\n
PDF Catalog<\/h4>\n
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\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 7<\/td>\n CONTENTS <\/td>\n<\/tr>\n \n 11<\/td>\n INTRODUCTION <\/td>\n<\/tr>\n \n 12<\/td>\n 1 Scope
2 Normative references <\/td>\n<\/tr>\n\n 14<\/td>\n 3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions <\/td>\n<\/tr>\n\n 18<\/td>\n 3.2 Symbols <\/td>\n<\/tr>\n \n 19<\/td>\n 3.3 Abbreviations <\/td>\n<\/tr>\n \n 20<\/td>\n 4 Methods of measurement
4.1 General <\/td>\n<\/tr>\n\n 21<\/td>\n 4.2 Linear distortion
Figures
Figure 1 \u2013 Maximum error a for measurement of return loss using VSWR-bridge with directivity D = 46\u00a0dB and 26\u00a0dB test port return loss <\/td>\n<\/tr>\n\n 22<\/td>\n Figure 2 \u2013 Measurement of return loss <\/td>\n<\/tr>\n \n 23<\/td>\n 4.3 Non-linear distortion <\/td>\n<\/tr>\n \n 24<\/td>\n Figure 3 \u2013 Basic arrangement of test equipment for evaluation of the ratio of signal to intermodulation product <\/td>\n<\/tr>\n \n 27<\/td>\n Figure 4 \u2013 Connection of test equipment for the measurementof non-linear distortion by composite beat <\/td>\n<\/tr>\n \n 29<\/td>\n Tables
Table 1 \u2013 Correction factors where the modulation used is other than 100\u00a0% <\/td>\n<\/tr>\n\n 31<\/td>\n Figure 5 \u2013 Connection of test equipment for the measurement of composite crossmodulation <\/td>\n<\/tr>\n \n 33<\/td>\n Figure 6 \u2013 Carrier\/hum ratio <\/td>\n<\/tr>\n \n 34<\/td>\n Figure 7 \u2013 Test set-up for local-powered objects
Figure 8 \u2013 Test set-up for remote-powered objects <\/td>\n<\/tr>\n\n 35<\/td>\n Figure 9 \u2013 Oscilloscope display <\/td>\n<\/tr>\n \n 36<\/td>\n 4.4 Automatic gain and slope control step response
Figure 10 \u2013 Time constant T <\/td>\n<\/tr>\n\n 37<\/td>\n Figure 11 \u2013 Measurement of AGC step response <\/td>\n<\/tr>\n \n 38<\/td>\n 4.5 Noise figure
Figure 12 \u2013 Measurement of noise figure <\/td>\n<\/tr>\n\n 39<\/td>\n 4.6 Crosstalk attenuation <\/td>\n<\/tr>\n \n 40<\/td>\n Figure 13 \u2013 Measurement of crosstalk attenuation for loop trough ports of multi-switches <\/td>\n<\/tr>\n \n 41<\/td>\n 4.7 Signal level for digitally modulated signals
4.8 Measurement of composite intermodulation noise ratio (CINR) <\/td>\n<\/tr>\n\n 42<\/td>\n Figure 14 \u2013 Characteristic of the noise filter
Figure 15 \u2013 Test setup for the non-linearity measurement
Table 2 \u2013 Notch filter frequencies <\/td>\n<\/tr>\n\n 44<\/td>\n 4.9 Immunity to surge voltages
Figure 16 \u2013 Presentation of the result of CINR <\/td>\n<\/tr>\n\n 45<\/td>\n 5 Equipment requirements
5.1 General requirements
Figure 17 \u2013 Measurement set-up for surge immunity test <\/td>\n<\/tr>\n\n 46<\/td>\n 5.2 Safety
5.3 Electromagnetic compatibility (EMC)
5.4 Frequency range
5.5 Impedance and return loss <\/td>\n<\/tr>\n\n 47<\/td>\n 5.6 Gain
5.7 Flatness
Table 3 \u2013 Return loss requirements for all equipment <\/td>\n<\/tr>\n\n 48<\/td>\n 5.8 Test points
5.9 Group delay
5.10 Noise figure
5.11 Non-linear distortion <\/td>\n<\/tr>\n\n 49<\/td>\n 5.12 Automatic gain and slope control
5.13 Hum modulation
5.14 Power supply <\/td>\n<\/tr>\n\n 50<\/td>\n 5.15 Environmental
5.16 Marking <\/td>\n<\/tr>\n\n 51<\/td>\n 5.17 Mean operating time between failure (MTBF)
5.18 Requirements for multi-switches <\/td>\n<\/tr>\n\n 52<\/td>\n 5.19 Immunity to surge voltages
Table 4 \u2013 Parameters of surge voltages for different degrees of testing levels
Table 5 \u2013 Recommendations for degree of testing levels <\/td>\n<\/tr>\n\n 53<\/td>\n Annex A (informative) Derivation of non-linear distortion <\/td>\n<\/tr>\n \n 55<\/td>\n Annex B (normative) Test carriers, levels and intermodulation products
Figure B.1 \u2013 An example showing products formed when 2fa > fb <\/td>\n<\/tr>\n\n 56<\/td>\n Figure B.2 \u2013 An example showing products formed when 2fa < fb
Figure B.3 \u2013 Products of the form fa \u00b1 fb \u00b1 fc <\/td>\n<\/tr>\n\n 57<\/td>\n Annex C (normative) Checks on test equipment <\/td>\n<\/tr>\n \n 58<\/td>\n Annex D (informative) Test frequency plan for composite triple beat (CTB), composite second order (CSO) and crossmodulation (XM) measurement
Table D.1 \u2013 Frequency allocation plan <\/td>\n<\/tr>\n\n 59<\/td>\n Annex E (informative) Measurement errors which occur due to mismatched equipment
Figure E.1 \u2013 Error concerning return loss measurement
Figure E.2 \u2013 Maximum ripple <\/td>\n<\/tr>\n\n 60<\/td>\n Annex F (informative) Examples of signals, methods of measurement and network design for return paths
Figure F.1 \u2013 Spectrum of a QPSK-modulated signal <\/td>\n<\/tr>\n\n 61<\/td>\n Table F.1 \u2013 Application of methods of measurement in IEC\u00a060728-3for return path equipment
Table F.2 \u2013 Application of methods of measurement in IEC\u00a060728-6for return path equipment <\/td>\n<\/tr>\n\n 62<\/td>\n Figure F.2 \u2013 Measurement of non-linearity using wideband noise <\/td>\n<\/tr>\n \n 63<\/td>\n Figure F.3 \u2013 Network used in the design example <\/td>\n<\/tr>\n \n 64<\/td>\n Figure F.4 \u2013 A test result measured from a real 20\u00a0dB return amplifier <\/td>\n<\/tr>\n \n 65<\/td>\n Figure F.5 \u2013 The CINR curve of one amplifier is modified to represent the CINR of the whole coaxial section of the network <\/td>\n<\/tr>\n \n 66<\/td>\n Figure F.6 \u2013 The CINR of an optical link as a function of OMI, example <\/td>\n<\/tr>\n \n 67<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Cable networks for television signals, sound signals and interactive services – Active wideband equipment for cable networks<\/b><\/p>\n
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\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2011<\/td>\n 70<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":228681,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-228679","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\/228679","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\/228681"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=228679"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=228679"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=228679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}