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BS EN IEC 62153-4-5:2021

BS EN IEC 62153-4-5:2021

$189.07

Metallic communication cable test methods – Electromagnetic compatibility (EMC). Screening or coupling attenuation. Absorbing clamp method

Published By Publication Date Number of Pages
BSI 2021 46
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The absorbing clamp method is suitable to determine the screening- or the coupling attenuation of metallic communication cables in the frequency range of 30 MHz to 2400 MHz, depending on the performance of the clamp. It is an alternative method to the the triaxial method of IEC 62153-4-4 or IEC 62153-4-9. Due to the undefined outer circuit of this absorbing clamp method, the test results obtained at different places and laboratories could vary by at least ± 6dB.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms and definitions
12 4 Principles of the test method
13 5 Equipment
5.1 General
14 5.2 Balun requirements
Figures
Figure 1 – Measurement of near end screening attenuation, principle
15 Tables
Table 1 − Balun performance characteristics (30 MHz to 1,0 GHz)
Table 2 − Balun performance characteristics (30 MHz to 2,4 GHz)
16 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)
17 5.4 Test sample
5.4.1 Tested cable length
5.4.2 Preparation of test sample
Figure 3 – Balunless measuring of near end couplingattenuation with multiport VNA
18 Figure 4 – Termination of a screened symmetrical cable
Figure 5 – Preparation of test sample (symmetrical and multi conductor cables)
19 6 Test set-up
6.1 Test set-up calibration
6.2 Composite loss of the test set-up
6.2.1 General
20 6.2.2 Reflection loss of the absorbing clamp in the calibration set-up
Figure 6 – Calibration set-up
Figure 7 – Termination during calibration
21 6.3 Attenuation of the measuring set-up
6.4 Insertion loss of the absorbers
22 6.5 Test set-up arrangement
Figure 8 – Measurement of the insertion loss of an absorber
23 Figure 9 – Example of screen connections forscreened twisted pair cable measurement
24 Figure 10 – Test set-up for near end measurement of symmetrical cable
Figure 11 – Measurement of surface wave at near end of sample, principle
25 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
26 7 Procedure
7.1 General
Figure 13 – Shielding arrangements for a far end measurement
27 7.2 Screening attenuation of coaxial respectively quasi coaxial cables
7.2.1 Matched conditions
28 7.2.2 Unmatched conditions
29 7.3 Coupling attenuation of balanced cables
7.3.1 Coupling attenuation measurement with balun
30 7.3.2 Balunless coupling attenuation measurement − Set-up
7.3.3 Expression of test results
8 Test report
31 9 Requirement
32 Annex A (normative)Determination of the impedance of the inner circuit
A.1 Determination of impedance of inner circuit
A.2 Impedance matching device if Z1 < 50 Ω
33 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
34 Annex B (informative)Example of a self-made impedance matching adapter
Figure B.1 – Attenuation and return loss
35 Figure B.2 – Attenuation and return loss
36 Annex C (informative)Evaluation of test results for the couplingattenuation of balanced cables
C.1 Worst case
C.2 Examples
Figure C.1 – Example measurement of a foil screen symmetrical cable
37 Figure C.2 – Example measurement of a well screened symmetrical cable
Figure C.3 – Example measurement of a well screened coaxial cable
38 Figure C.4 – Frequent measurement error of a symmetrical cable
Figure C.5 – Frequent measurement error of a symmetrical cable
39 Annex D (informative)Reflection loss of a junction
Figure D.1 – Source with Ri and RL
41 Annex E (informative)Mixed mode parameters
E.1 Definition of mixed mode S-parameters
Figure E.1 – Common two-port network
Figure E.2 – Common four port network
42 Figure E.3 – Physical and logical ports of VNA
Figure E.4 – Nomenclature of mixed mode S-parameters
43 Figure E.5 – Measurement configuration, single ended response
Figure E.6 – Measurement configuration, differential mode response
44 E.2 Reference impedance of VNA
45 Bibliography

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BS EN IEC 62153-4-5:2021
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