Table of Contents

1 Overview
  1.1 Scope
  1.2 Purpose
  1.3 Application
2 Normative references
3 Definitions
  3.1 General terminology
  3.2 Technical terminology
4 Preliminary procedures
  4.1 Background
  4.2 Test plan
  4.3 Calibration
  4.4 Reference level and dynamic range
  4.5 Preliminary shield check procedures
  4.6 Test/witness personnel
5 Detailed procedures
  5.1 Background
  5.2 Recommended standard measurement frequencies
  5.3 Pass/fail requirements
  5.4 Shielding effectiveness calculation
  5.5 Preparation procedures
  5.6 Low-frequency measurements (9 kHz to 20 MHz)
  5.7 Resonant range measurements (20 MHz to 300 MHz)
  5.8 High-frequency measurements (300 MHz to 18 GHz)
6 Quality assurance technical report
  6.1 Abbreviated test report
  6.2 Full test report
Annex A (informative) Rationale
      A.1 Basis
      A.2 Considerations pertinent to the objectives of 1.2
      A.3 Cavity resonances
      A.4 Measurement locations
      A.5 Measurement equipment
Annex B (informative) Mathematical formulas
      B.1 Specific mathematical formulations
      B.2 Low-range (50 Hz to 20 MHz) shielding effectiveness
      B.3 Resonant range (20 MHz to 300 MHz) shielding effectiveness
      B.4 High-range (300 MHz to 100 GHz) shielding effectiveness
      B.5 Nonlinear (logarithmic) calculations
      B.6 Dynamic range considerations
Annex C (informative) Miscellaneous supporting information
      C.1 Coplanar versus coaxial loops
      C.2 Nonlinearity of high-permeability ferromagnetic enclosures
      C.3 Selecting measurement frequencies
Annex D (informative) Guidelines for the selection of measurement
        techniques
      D.1 Types of enclosures
      D.2 Performance requirements
      D.3 Equipment requirements
      D.4 Regulatory agency conflicts
Annex E (informative) Preliminary measurements and repairs
      E.1 Background
      E.2 Frequencies for preliminary check
      E.3 Preliminary check procedures

Abstract

Presents uniform measurement procedures for determining the effectiveness of electromagnetic (EM) shielding enclosures at frequencies from 9 kHz to 18 GHz (extendable down to 50 Hz and up to 100 GHz).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	MIL STD 285 : 0 IEEE DRAFT 299 : 0