IEC 62153-4-2 : 1.0

METALLIC COMMUNICATION CABLE TEST METHODS - PART 4-2: ELECTROMAGNETIC COMPATIBILITY (EMC) - SCREENING AND COUPLING ATTENUATION - INJECTION CLAMP METHOD

International Electrotechnical Committee

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FOREWORD
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Electrical symbols
  3.2 Definitions
4 Principle
  4.1 Injecting mode
5 Procedure
  5.1 Test equipment
  5.2 Preparation of test sample
      5.2.1 Effective cable length
      5.2.2 Total cable length
      5.2.3 Inner termination of balanced cables
      5.2.4 Inner termination of coaxial (unbalanced) cables
      5.2.5 Connection of the screen
      5.2.6 Height of CUT over the ground plane
      5.2.7 Termination plates
      5.2.8 Complete preparation
  5.3 Calibration procedure
      5.3.1 Connecting coaxial cables
      5.3.2 Electromagnetic injection clamp
      5.3.3 Balun (if applicable)
  5.4 Measuring procedure
6 Evaluation of the test results
7 Requirement
Figure 1 - Inner system of a screened/unscreened twisted pair
            cable
Figure 2 - Outer system in case of unscreened twisted pair
            cable
Figure 3 - Printed circuit with RF-SMD-resistors for inner
            system matching
Figure 4 - Termination plate for near-end and far-end matching
Figure 5 - Termination-plate panel at the near end
Figure 6 - Termination-plate panel at the far end
Figure 7 - Preparation of test sample
Figure 8 - Operational attenuation of connecting coaxial
            cables
Figure 9 - Set-up for reference attenuation a[ref]
Figure 10 - Set-up for reference attenuation a[clamp, ref]
Figure 11 - Individual operational attenuation of three
            (identical) baluns
Figure 12 - Two baluns in series for a non-cyclical
            substitution calibration procedure
Figure 13 - Deviation of attenuation as possible error source
Figure 14 - Complete test set-up
Table 1 - Electrical symbols

Abstract

Describes the injection clamp test method which determines the screening attenuation (a[s]) of coaxial cables and the coupling attenuation (a[c]) of balanced shielded or unshielded data cables in a frequency range from 30 MHz up to 1 000 MHz and in a dynamic range up to 130 dB.