BSI 12/30276356 DC:2012 Edition
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BS EN 62153-4-1. Metallic communication cable test methods. Part 4-1. Introduction to electromagnetic (EMC) test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 87 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | 1 Scope 2 Normative references 3 Electromagnetic phenomena |
| 8 | 4 The intrinsic screening parameters of short cables 4.1 General |
| 9 | 4.2 Surface transfer impedance, ZT 4.3 Capacitive coupling admittance, YC |
| 11 | 4.4 Injecting with arbitrary cross-sections 4.5 Reciprocity and symmetry 4.6 Arbitrary load conditions 5 Long cables – coupled transmission lines |
| 18 | 6 Transfer impedance of a braided wire outer conductor or screen |
| 24 | 7 Test possibilities 7.1 General 7.2 Measuring the transfer impedance of coaxial cables 7.3 Measuring the transfer impedance of cable assemblies |
| 25 | 7.4 Measuring the transfer impedance of connectors 7.5 Calculated maximum screening level |
| 31 | 8 Comparison of the frequency response of different triaxial test set-ups to measure the transfer impedance of cable screens 8.1 General 8.2 Physical basics 8.2.1 Triaxial set-up 8.2.1.1 General |
| 32 | 8.2.1.2 Load conditions of the different set-ups |
| 34 | 8.2.2 Coupling equations 8.3 Simulations 8.3.1 General |
| 35 | 8.3.2 Simulation of the standard and simplified methods according to EN 50289-1-6, IEC 61196-1 (method 1 and 2) and IEC 62153-4-3 (method A) |
| 41 | 8.3.3 Simulation of the double short circuited methods 8.3.3.1 General 8.3.3.2 Simulation of the double short circuited method using a measuring tube |
| 46 | 8.3.3.3 Simulation of the double short circuited method using a “milked on braid” |
| 49 | 8.4 Conclusion |
| 50 | 9 Background of the shielded screening attenuation test method (IEC 6215344) 9.1 General 9.2 Objectives |
| 51 | 9.3 Theory of the triaxial measuring method |
| 55 | 9.4 Screening attenuation |
| 57 | 9.5 Normalised screening attenuation |
| 58 | 9.6 Measured results |
| 60 | 9.7 Comparison with absorbing clamp method 9.8 Practical design of the test set-up |
| 62 | 9.9 Influence of mismatches |
| 65 | 10 Background of the shielded screening attenuation test method for measuring the screening effectiveness of feed throughs and electromagnetic gaskets (IEC 62153410) 10.1 Introduction 10.2 Theoretical Background of the Test Fixtures and their Equivalent Circuit |
| 68 | 10.3 Pictures and Measurement Results 10.3.1 Characteristic Impedance Uniformity |
| 70 | 10.3.2 Measurements of Shielding Effectiveness |
| 72 | 10.3.3 Calculation of Transfer Impedance |
| 74 | 10.4 Calculation of screening attenuation for feed-through when the transfer impedance ZT is known. |
| 76 | 11 Background of the shielded screening attenuation test method for measuring the screening effectiveness of RF connectors and assemblies (IEC 6215347) 11.1 Physical basics 11.1.1 Surface Transfer Impedance ZT 11.1.2 Screening attenuation aS 11.1.3 Coupling attenuation aC 11.1.4 Coupling transfer function |
| 77 | 11.1.5 Relationship between length and Screening measurements |
| 78 | 11.2 Tube in tube set-up 11.2.1 Procedure |
| 79 | 11.2.2 Measurements and simulations |
| 81 | 11.2.3 Influence of contact resistances |
