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eLibrary > BS EN IEC 62153-4-5:2021 Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling attenuation – Absorbing clamp method >

BS EN IEC 62153-4-5:2021 Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling attenuation – Absorbing clamp method, 2021

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BS EN IEC 62153-4-5:2021 Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling attenuation – Absorbing clamp method, 2021

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Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
English [Go to Page]
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Principles of the test method
5 Equipment [Go to Page]
5.1 General
5.2 Balun requirements
Figures [Go to Page]
Figure 1 – Measurement of near end screening attenuation, principle
Tables [Go to Page]
Table 1 − Balun performance characteristics (30 MHz to 1,0 GHz)
Table 2 − Balun performance characteristics (30 MHz to 2,4 GHz)
5.3 TP connecting unit requirements
Figure 2 – Measurement of near end coupling attenuation with balun
Table 3 – TP-connecting unit performance characteristics(30 MHz to 2,4 GHz)
5.4 Test sample [Go to Page]
5.4.1 Tested cable length
5.4.2 Preparation of test sample
Figure 3 – Balunless measuring of near end couplingattenuation with multiport VNA
Figure 4 – Termination of a screened symmetrical cable
Figure 5 – Preparation of test sample (symmetrical and multi conductor cables)
6 Test set-up [Go to Page]
6.1 Test set-up calibration
6.2 Composite loss of the test set-up [Go to Page]
6.2.1 General
6.2.2 Reflection loss of the absorbing clamp in the calibration set-up
Figure 6 – Calibration set-up
Figure 7 – Termination during calibration
6.3 Attenuation of the measuring set-up
6.4 Insertion loss of the absorbers
6.5 Test set-up arrangement
Figure 8 – Measurement of the insertion loss of an absorber
Figure 9 – Example of screen connections forscreened twisted pair cable measurement
Figure 10 – Test set-up for near end measurement of symmetrical cable
Figure 11 – Measurement of surface wave at near end of sample, principle [Go to Page]
6.5.1 Test set-up verification
6.6 Pulling force on cable
Figure 12 – Measurement of surface wave at far end of sample, principle
7 Procedure [Go to Page]
7.1 General
Figure 13 – Shielding arrangements for a far end measurement
7.2 Screening attenuation of coaxial respectively quasi coaxial cables [Go to Page]
7.2.1 Matched conditions
7.2.2 Unmatched conditions
7.3 Coupling attenuation of balanced cables [Go to Page]
7.3.1 Coupling attenuation measurement with balun
7.3.2 Balunless coupling attenuation measurement − Set-up
7.3.3 Expression of test results
8 Test report
9 Requirement
Annex A (normative)Determination of the impedance of the inner circuit [Go to Page]
A.1 Determination of impedance of inner circuit
A.2 Impedance matching device if Z1 < 50 Ω
A.3 Impedance matching device if Z1 > 50 Ω
Figure A.1 – Impedance matching for Z1 <50 Ω
Figure A.2 – Impedance matching for Z1 >50 Ω
Annex B (informative)Example of a self-made impedance matching adapter [Go to Page]
Figure B.1 – Attenuation and return loss
Figure B.2 – Attenuation and return loss
Annex C (informative)Evaluation of test results for the couplingattenuation of balanced cables [Go to Page]
C.1 Worst case
C.2 Examples
Figure C.1 – Example measurement of a foil screen symmetrical cable
Figure C.2 – Example measurement of a well screened symmetrical cable
Figure C.3 – Example measurement of a well screened coaxial cable
Figure C.4 – Frequent measurement error of a symmetrical cable
Figure C.5 – Frequent measurement error of a symmetrical cable
Annex D (informative)Reflection loss of a junction [Go to Page]
Figure D.1 – Source with Ri and RL
Annex E (informative)Mixed mode parameters [Go to Page]
E.1 Definition of mixed mode S-parameters
Figure E.1 – Common two-port network
Figure E.2 – Common four port network
Figure E.3 – Physical and logical ports of VNA
Figure E.4 – Nomenclature of mixed mode S-parameters
Figure E.5 – Measurement configuration, single ended response
Figure E.6 – Measurement configuration, differential mode response
E.2 Reference impedance of VNA
Bibliography [Go to Page]

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BS EN IEC 62153-4-5:2021 Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling attenuation – Absorbing clamp method, 2021

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