EMC Course Syllabus2019-01-23T16:34:53+00:00

EMC/EMI Course Syllabus

  • Introduction To EMC

    • Background terms and definitions
  • Commercial And Military Standards On EMC

    • Brief description of the Purpose and intent of the standards, with focus on those requirements which are difficult to meet
  • Spectrum And Time Domain Signals

    • Spectrum of communication data signals, clocks and switching mode power supplies.
    • Engineering aspects of the parameters which often cause failures in EMC Compliance testing
  • Cables In EMC: As Radiators And As Radiation Receptors

    • A cable as an elementary antenna and its extension to electrically long cables.
    • Identification of the parameters determining the radiation intensity and controlling them
    • The Model of a cable as a receptor of Electromagnetic Radiation,
    • Identification of the parameters determining the amplitude of the reception and controlling
  • Switched Mode Power Supplies

    • Sources of interference in switched mode power supplies-SMPS,
    • Identification of the generators of interference and their control, filtering an SMPS to comply with the require-ments of conducted Emissions on the power leads.
  • Filtering Of Conducted Interference

    • Principles of EMI Filtering,
    • Structure and topology of common filters,
    • Limitations of filtering components,
    • Selection of a filter based on termination impedances and filtering requirements.
    • Filtered pin connectors.
    • The importance of the placement of the filter,
    • Considerations when selecting or designing a filter
  • Shielding

    • The need for shielding,
    • Materials used for shielding,
    • Properties of metals conducive to shielding,
    • Basic shielding theory,
    • Engineering results as to the materials to be used,
    • Shielding integrity faults due to penetrations and apertures and how to control them, engineering results as to bolt spacing.
    • Cable shielding, gaskets, vents, viewing ports
  • Transients

    • Sources of transients,
    • Expression for transient immunity in the standards for lightning,
    • Inductive load switching and ESD.
    • Selection of TVS transient voltage suppressor components to comply with the standards
  • Grounding

    • Purpose of grounding,
    • Impedance of conductors used for grounding,
    • Single and multiple point grounding,
    • High speed board grounding
  • Bonding

    • Bonding for electrical continuity,
    • Electro-chemical properties of metals, corrosion effects, surface treatment to avoid corrosion,
    • Bonding resistance requirements
  • EMC Aspects Of Electronic Circuit Design

    • Selection of electronic component technology to minimize conducted and radiated Emissions.
    • Board design for component placement, layer stack-up, separation of traces, area segregation in ground and power planes,
    • Pin allocation in board to mother board connectors,
    • On board filtering

     

  • Preparedness For EMC Lab Testing

    • The requirements of the standards,
    • The EMC Test Plan,
    • Setting the modes of operation, setting the pass-fail criteria, separation between the equipment being tested and the associated controlling-operating equipment

     

     

     

     

  • Spectral Analysis and Case studies

    • Signals in time and Frequency Domain
    • Types of Spectrum Analyzers
    • Basic Block Diagram of an Analog SA
    • The SA as a Receiver
    • Selectivity, AGC, LO Phase Noise
    • Microwaves Spectrum Analyzer
    • Frequency Resolution and RBW
    • Limitations on the Sweep Rate
    • RF Attenuator
    • IF Amplification
    • Shape Factor of the RBW Filter and Sweep Rate
    • Noise Floor
    • Video Signal Filtering (Post-Detection)
    • Filtering by Averaging Screens
    • SA Controls (Span, RBW, Att, VBW)
    • Dynamic Range
    • Detector Types and their Characteristics
    • Sampling and the Sampling Theorem
    • Spectrum of a Uniformly Sampled Signal
    • Artifacts in Digitally Processed Spectrum Display
    • Side-Lobes in Frequency Domain and Windowing
    • RBW broadening by Windowing
    • 0nd and 0rd Order Distortions and Spurii – Identification of Saturation in the SA
    • Effect of LO Phase Noise
    • Residual FM
    • Time Domain Measurements – Zero Span
    • Signal Power response in time
    • Intermodulation Measurements
    • Intermodulation with two-tones Stimulus
    • Adjacent channel power (ACP)
    • Adjacent channel leakage ratio (ACLR)
    • Tracking Generator Configuration and Scalar Network Analyzer Measurements
    • Demonstration of SA operation and Measurements
  • EMC/EMI Simulation

    • Solver Choice
    • Basic Meshing
    • Workflow example
    • Conducted emission
    • Conducted Susceptibility
    • Shielding  
    • Radiated emission
    • Cables routing  and the effect on the radiated emission.
    • Radiation Hazard
    • Lightning Strike simulation
    • Antenna placement
    • Antenna placement- Coverage analysis using Altair WinProp wave propagation tool.
  • Military EMI Control Standard For Equipment

    • Mil Std 400G history, structure, basic requirements for lab facility, scan of the testing requirements, the purpose, rationale and limits. Tailoring of the standard limits
  • Commercial EMI Control Standards For Equipment

    • FCC part 08 limits on conducted and radiated emissions.
    • The difference between class A and Class B ITE,
    • The meaning of a Quasi Peak limit.
    • European community- CE EMI control standards,
    • Emissions and susceptibility.
    • The open area test site-OATS and its shielded enclosure replacement.Failure criteria.
    • Scan of the immunity requirements per EN00222-4.

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