Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Background, content and future of the EMC measurement standard EN Correlation between radiated immunity and coupling attenuation Michiel Pelt

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN New standards on cables  EN50288-X-Y: Multi-element cables use in analogue and digital communication and control  Sectional specifications  EN X-Y: Communication cables - Specification for test methods  Electrical, mechanical, environmental test methods  EN X-Y: Communication cables  Common design rules, quality assessment

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Need for new test method  No test methods for:  combined effect of balance and screening  comparing UTP, ScTP, FTP, STP,....  connecting hardware, cable assemblies and channels  balance at higher frequencies

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Members of CLC TC 46X WG3  Test Laboratories  GHMT in Germany  DELTA and 3P in Denmark  Cable Manufacturers BEDEA, BICC, COMMSCOPE, AVAYA, NEXANS NEK/CDT etc.  User and others ACS, IBM, BT, Helsinki University,Telesafe etc.

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Work done by CLC TC 46X WG3  EN t Existing EMC test methods for CABLES t Coupling attenuation => NEW !!!  Pr EN (ongoing) t Coupling attenuation on patch cords / cable assemblies  Pr EN (ongoing)  Coupling attenuation on connecting hardware  Pr EN (ongoing) t Attenuation unbalance

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Outline  Physical basics of cable screening  Measurement Procedures of EN  Transferimpedance  triaxial method, Wire injection method  Screening attenuation  triaxial method (clamp method = coupling attenuation)  Coupling attenuation  Clamp methods (triaxial method exists but not in standard)

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Equivalent circuit for general coupling transfer function Z 2,  r2, v 12,  2 Z 1,  r1, v 1,  1

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Transfer impedance Z T

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Capacitive coupling impedance Z F

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Effective transfert impedance Z F

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Coupling transfer function For matched lines:

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN The summing function ( l f) cn ( l f) cf far near S ( l f) 20 dB/decade

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Calculated coupling transfer function frequency dB L=1 m  r1 =2,3  r2 =1,0 Z F =0

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Screening attenuation a s

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Relation between Z TE and a S Normalised conditions: Z S =150   v/v  =10%or  r1 /  r2n =1,21

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN What is coupling attenuation a C The coupling between symmetrical (balanced, differential mode) cables and the surrounding is dependent on  the balance to ground of the pair and  the efficiency of the screen.

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Transfer impedance, triaxial test set-up Frequency range: DC to 100 MHz

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Transfer impedance, injection wire set-up, (far end) 1 Networkanalyzer5 cable under test 2 attenuator 20 dB6 adhesive tape 3 power splitter7 termination load 4 matching pads8 injection wire Frequency range: DC to 3 GHz

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Screening attenuation, triaxial set-up Frequency range: 30 MHz to 4 GHz

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Coupling attenuation, absorbing clamp set-up, (near end) Frequency range: 30 MHz to 1 GHz

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Summary  wire injection method transfer impedance  clamp methods screening attenuation, coupling attenuation  triaxial method transfer impedance, screening attenuation, coupling attenuation

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Screening attenuation, absorbing clamp set-up, (near end) Frequency range: 30 MHz to 1 GHz (0,5 to 2,5 GHz) MDS 21 MDS 22

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Screening attenuation, injection clamp set-up, (near end) Frequency range: 100 KHz to 1 GHz EM 101

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Coupling attenuation, injection clamp set-up, (near end) Frequency range: 100 KHz to 1 GHz

Michiel Pelt, Nexans Cabling Solutions, Alsembergsestw 2b3, B-1501 Buizingen, Belgium Background, content and future of EN Coupling attenuation, triaxial set-up Frequency range: 30 MHz to 3 GHz