IEC 62153-4-3:2013(E) determines the screening effectiveness of a cable shield by applying a well-defined current and voltage to the screen of the cable and measuring the induced voltage in order to determine the surface transfer impedance. This test measures only the magnetic component of the transfer impedance. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – now three different test configurations are described; – formulas to calculate the maximum frequency up to which the different test configurations can be used are included; – the effect of ground loops is described.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Figures Figure 1 \u2013 Definition of ZT <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figure 2 \u2013 Definition of ZF <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4 Principle 5 Test methods 5.1 General 5.2 Test equipment <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.3 Calibration procedure 5.4 Sample preparation <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.5 Test set-up Figure 3 \u2013 Preparation of test sample for coaxial cables Figure 4 \u2013 Preparation of test sample for symmetrical cables <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.6 Test configurations 5.6.1 General 5.6.2 Vector network analyser with S-parameter test set Figure 5 \u2013 Connection to the tube Figure 6 \u2013 Test set-up using a vector network analyser with the S-parameter test set <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.6.3 (Vector) network analyser with power splitter 5.6.4 Separate signal generator and receiver Figure 7 \u2013 50\u00a0( power splitter, 2- and 3-resistor types Figure 8 \u2013 Test set-up using a network analyser (NA) and a power splitter Figure 9 \u2013 Test set-up using a signal generator and a receiver <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.7 Expression of test results 5.7.1 Expression 5.7.2 Test report 6 Test method A: Matched inner circuit with damping resistor in outer circuit 6.1 General 6.2 Damping resistor R2 Figure 10 \u2013 Test set-up using a signal generator and a receiver with feeding resistor <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.3 Cut-off frequency 6.4 Block diagram of the set-up 6.5 Measuring procedure Figure 11 \u2013 Test set-up (principle) <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.6 Evaluation of test results 7 Test method B: Inner circuit with load resistor and outer circuit without damping resistor 7.1 General 7.2 Cut-off frequency 7.3 Block diagram of the set-up <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 7.4 Measuring procedure Figure 12 \u2013 Test set-up (principle) <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 7.5 Evaluation of test results 8 Test method C: (Mismatched)-Short-Short without damping resistor 8.1 General 8.2 Cut-off frequency <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.3 Block diagram of the set-up 8.4 Measuring procedure 8.5 Evaluation of test results Figure 13 \u2013 Test set-up (principle) <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex A (normative) Determination of the impedance of the inner circuit <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Annex B (normative) Impedance matching adapter Figure B.1 \u2013 Impedance matching for Z2 < Z1 <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Figure B.2 \u2013 Impedance matching for Z2 > Z1 <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure B.3 \u2013 Coaxial impedance matching adapters (50 \u03a9 to 75 \u03a9) <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Figure B.4 \u2013 Attenuation of 50 \u03a9 to 75 \u03a9 impedance matching adapter <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Annex C (normative) Sample preparation for \u201cmilked on braid\u201d method <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure C.1 \u2013 Coaxial cables: preparation of cable end \u201cA\u201d (1 of 2) <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Figure C.2 \u2013 Coaxial cables: preparation of cable end \u201cB\u201d <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure C.3 \u2013 Symmetrical cables: preparation of cable end \u201cA\u201d (1 of 2) <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure C.4 \u2013 Symmetrical cables: preparation of cable end \u201cB\u201d <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure C.5 \u2013 Typical resonance of end \u201cA\u201d Figure C.6 \u2013 Typical resonance of end \u201cB\u201d <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex D (informative) Triaxial test set-up depicted as a T-circuit Figure D.1 \u2013 Triaxial set-up depicted as a T-circuit <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex E (informative) Cut-off frequency of the triaxial set-up for the measurement of the transfer impedance Figure E.1 \u2013 Equivalent circuit of the triaxial set-up <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Figure E.2 \u2013 Frequency response of the triaxial set-up for different load conditions <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figure E.3 \u2013 Measurement of S11 of the outer circuit (tube) having a length of 50\u00a0cm <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Annex F (informative) Impact of ground loops on low frequency measurements Figure F.1 \u2013 Triaxial test set-up <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure F.2 \u2013 Equivalent circuits of the triaxial set-up <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure F.3 \u2013 Example showing the impact of the measurement error <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Metallic communication cable test methods – Electromagnetic compatibility (EMC). Surface transfer impedance. Triaxial method<\/b><\/p>\n |