Electromagnetic Integrity Engineering™ for Product Design and EMC Engineering

From PCB-Level Design to System Integration, Compliance, and Reliable Operation

ELEXANA | Technical references reviewed in October 2026

©2026

1. EMC Is a Product Design Responsibility, Not Simply a Final Test

An electronic product should not reach its final compliance test with its electromagnetic performance still largely unknown.

At ELEXANA, we regard electromagnetic compatibility as a design responsibility that begins with the product’s intended function and continues through development, verification, manufacturing, and deployment. The purpose is to produce equipment that can operate reliably in its intended environment without creating unacceptable interference for other equipment.

This requires attention to both emissions and immunity. Controlling what a product emits and establishing what it can tolerate are related but different engineering tasks. The European Commission’s EMC framework expressly addresses both responsibilities. [1] Internal Market and SMEs

A compliance test provides evidence about a defined product configuration under specified conditions. Engineering establishes how that configuration should be designed, why a failure occurs, and what changes are justified.

Pre-compliance testing can help identify problems during development, before they become late-stage compliance failures. Its value is greatest when it is integrated with design review and investigation rather than treated as an inexpensive substitute for the final test. [2]

At ELEXANA, we use Electromagnetic Integrity Engineering™ to describe this broader approach. It connects the electromagnetic behavior of circuits, printed circuit boards, enclosures, power systems, interconnections, and the complete product.

The objective is not merely to obtain a passing report. It is to engineer a product that satisfies its requirements while preserving its intended functionality.

2. What Product-Level Electromagnetic Integrity Must Address

A complete assessment considers how the product affects its surroundings, how its surroundings affect it, and how its own subsystems interact.

Emissions and Immunity Are Different Questions

Emissions assessment concerns unwanted electromagnetic disturbances produced by equipment. Immunity assessment concerns the equipment’s ability to perform acceptably when subjected to disturbances.

A product can perform satisfactorily during an emissions test while still requiring substantial immunity evaluation. Conversely, equipment that tolerates external disturbances may generate emissions that interfere with other systems. Both aspects must be addressed according to the applicable requirements. [1]

Neither question is answered solely by confirming that the product turns on and completes a normal functional check.

A Product Can Interfere with Itself

The source of interference does not have to be outside the enclosure.

Power conversion and other switching functions can produce electromagnetic disturbances that interact with circuitry elsewhere in the same product. Texas Instruments demonstrates that the physical implementation of a switching-power design can materially affect its emissions, even when the underlying converter remains the same. [3]

For a product combining sensitive measurements with processing, communications, or motor control, we therefore recommend evaluating the complete electromagnetic design rather than assuming that each subsystem can be assessed independently.

As an illustrative example, a sensor may meet its accuracy requirement when evaluated alone but require further investigation when operated alongside the product’s power-conversion and communications functions. The engineering question is whether the complete product preserves the required measurement performance.

Immunity Requires Meaningful Performance Criteria

Remaining powered is not necessarily the same as operating correctly.

A product may recover after a disturbance but still have lost information, interrupted a required function, or produced an unacceptable output during the event. Whether a temporary deviation is acceptable depends on the applicable standard, intended use, and consequences.

For medical devices, the FDA recommends immunity acceptance criteria that are quantitative, observable, and specific to the device’s functions. It also distinguishes responses to transient disturbances from responses to continuous disturbances. [4] U.S. Food and Drug Administration

We apply the same underlying discipline when planning other product evaluations: define what must remain dependable and how that performance will be observed.

Component Ratings Do Not Establish Complete Product Performance

Component specifications are important inputs, but their scope must be understood.

For example, an integrated circuit’s component-level electrostatic-discharge rating is not equivalent to demonstrating the completed product’s immunity to a system-level ESD event. Texas Instruments distinguishes these conditions and explains why device-level protection alone may be insufficient. [5]

The broader lesson is that product performance must be established at the appropriate level of integration.

3. Begin Before the Design Becomes Difficult to Change

We recommend incorporating EMC requirements while the product’s electrical and mechanical architecture is still being developed.

This does not mean adding unnecessary complexity to every design. It means identifying the decisions that could constrain the eventual solution before those decisions become embedded in production hardware.

Define the Product and Its Intended Environment

An effective development plan begins with the product’s functions, target markets, intended users, installation conditions, and relevant interfaces.

We recommend establishing the required operating modes and the performance that must be maintained before selecting the test program. A laboratory instrument, industrial controller, medical system, and wireless consumer product may require substantially different assessments.

The intended environment also matters. A product designed for a controlled laboratory should not be assumed suitable for every industrial installation merely because it operates from the same supply voltage.

The resulting requirements should guide design and verification, not remain a separate document reviewed only before laboratory booking.

Review the Complete Product, Not Only the Schematic

A schematic describes intended electrical connections. It does not fully describe the electromagnetic behavior of the physical assembly.

PCB implementation, power conversion, mechanical packaging, and interconnections all deserve consideration. The effect of physical layout on switching-converter emissions provides one documented example of why circuit function alone does not establish electromagnetic performance. [3]

Our design reviews consider the complete product and the constraints the development team must satisfy.

We also recommend coordinating EMC with signal integrity, power integrity, thermal management, electrical safety, serviceability, and manufacturing requirements. A proposed change should be evaluated for its effect on the product as a whole.

Work Alongside the Development Team

EMC engineering should complement the manufacturer’s knowledge of its product.

The development team understands its functional requirements, operating states, design history, and commercial constraints. Specialized electromagnetic engineering contributes a different perspective on the behavior of the integrated system.

At ELEXANA, our role is to help connect those perspectives and establish an evidence-based path forward. We do not assume that a difficult EMC problem means the original team lacks engineering ability.

4. Pre-Compliance Testing Should Reduce Uncertainty

Pre-compliance testing is most useful when it answers a specific development question.

It can support early risk identification, comparison of design alternatives, or assessment of readiness for formal testing. Rohde & Schwarz describes pre-compliance methods as adaptable approximations of the compliance environment, with their suitability depending on the measurements and conditions involved. [2] Rohde & Schwarz

That distinction should remain clear in the interpretation of results.

Development Measurements and Compliance Measurements Serve Different Purposes

A diagnostic measurement can be highly useful without being sufficient for a regulatory compliance claim.

For example, a measurement that helps compare two design configurations may establish which performs better under the diagnostic conditions. It does not necessarily establish the final compliance margin.

We recommend stating the purpose and limitations of development measurements explicitly. This allows the team to use the evidence appropriately without assigning it more authority than the method supports.

Include the Configuration That Will Be Supplied

Our recommended approach is to evaluate a configuration representative of the product that will be manufactured and used.

The plan should account for relevant accessories, interfaces, operating modes, and product variants. Where representative configurations are selected, the basis for that selection should be documented.

We also recommend avoiding an artificially favorable test condition that excludes the operation responsible for the product’s intended value. A development test should help establish readiness, not conceal an unresolved operating condition.

Establish a Defensible Margin

A result close to a limit deserves engineering review.

We recommend considering measurement uncertainty, repeatability, configuration differences, and production variation when deciding whether a design has adequate margin. A single favorable result should not be treated as proof that every manufactured unit will behave identically.

The appropriate margin is application-specific. We would not prescribe one universal decibel allowance as a guarantee of compliance.

Formal evaluation must still follow the applicable measurement methods and conformity-assessment requirements.

5. Resolving EMC Failures Without Sacrificing the Product

A failed test identifies a condition requiring attention. It does not necessarily identify the underlying cause or the appropriate correction.

At ELEXANA, we distinguish between reducing a measured symptom and resolving the engineering problem responsible for it.

Understand the Failure Before Selecting the Remedy

Additional testing can improve understanding, but repeating the same test without a new engineering question may provide little direction.

Our investigation considers the observed failure, the product’s operation, and the interactions within the assembled system. The objective is to determine which changes are justified and how their effectiveness should be verified.

We do not begin with the assumption that the answer must be a filter, shield, firmware change, or new PCB. A limited modification may be sufficient, or the evidence may indicate a broader design issue.

The appropriate scope follows the findings.

Preserve Functionality and Other Safety Requirements

An EMC correction should support the product’s intended performance, not quietly redefine it.

We recommend evaluating proposed changes against measurement accuracy, communications performance, power consumption, thermal behavior, and other relevant design requirements.

Electrical safety must remain part of that review. For example, IEC 62368-1 addresses safeguards for audio/video, information, and communications technology equipment within its scope. An EMC modification does not remove those obligations. [19]

Disabling a required function, bypassing protection, or creating an undocumented operating restriction should not be represented as equivalent to delivering the originally intended product.

A legitimate change to product requirements may sometimes be necessary, but it should be a deliberate, documented decision by the manufacturer, with the associated consequences evaluated.

Verify More Than the Original Failure

We recommend checking whether a correction has affected other functions or altered the basis of previous testing.

The endpoint should be a controlled design supported by appropriate evidence, not a prototype containing undocumented modifications that cannot be reproduced in production.

Depending on the change and applicable requirements, targeted verification may be sufficient, or additional formal testing may be necessary.

6. Wireless Integration Creates Additional Engineering Responsibilities

Adding a radio module does not make the complete product’s electromagnetic responsibilities disappear.

A Certified Module Is Not Blanket Approval of the Host Product

FCC modular-transmitter provisions establish conditions for modular approval, installation instructions, labeling, and applicable RF-exposure requirements. The FCC also publishes guidance specifically for manufacturers integrating transmitter modules into host products. [6]

A module’s certification can support an appropriate authorization strategy, but it must be used within its applicable conditions. The manufacturer must still establish the requirements for the complete host product and any remaining functions.

The relevant engineering question is not simply whether the module has an FCC identification number. It is whether the intended integration remains within the approval conditions and whether the finished product satisfies its own obligations. [6] eCFR

Wireless Coexistence Is Not the Same as General EMC

A radio may function correctly in a quiet test setting yet require evaluation in an environment containing other wireless services.

ANSI C63.27-2021 provides an evaluation process and supporting methods for assessing wireless coexistence in intended RF environments. [7]

For connected equipment, we recommend defining the communications performance that matters to the application. The assessment should distinguish interference affecting a radio link from disturbances affecting the product’s electronics.

A connected sensor, robotic system, or medical device may require attention to both.

7. Selecting the Correct Standards and Compliance Pathway

No single “EMC certification” applies to every electronic product.

The applicable requirements depend on product classification, functionality, intended environment, market, and conformity-assessment framework. Standards should be selected because their scope fits the product, not because they are familiar or convenient.

United States: FCC Equipment Authorization

The FCC uses Certification and Supplier’s Declaration of Conformity, or SDoC, as equipment-authorization procedures. The applicable route depends on the equipment and governing rules. A product with several functions may require more than one procedure. [8]

Certification involves an FCC-recognized Telecommunications Certification Body and testing by an FCC-recognized accredited laboratory. Under SDoC, the responsible party must ensure compliance and maintain the required evidence, but use of an FCC-recognized accredited laboratory is not universally required. [8] Federal Communications Commission

These distinctions matter when preparing a development and testing plan. A supplier should not describe every electronic product as requiring the same certification process.

FCC authorization also should not be presented as a general guarantee of functional immunity or product safety.

European Union: EMC Directive, RED, and CE Marking

For products within its scope, Directive 2014/30/EU, the EMC Directive, establishes electromagnetic compatibility obligations. The manufacturer’s responsibilities include appropriate conformity assessment, technical documentation, an EU declaration of conformity, and CE marking. [9]

Radio equipment is generally addressed through Directive 2014/53/EU, the Radio Equipment Directive, which includes requirements concerning safety and health, EMC, and effective use of radio spectrum. [10]

CE marking is not simply a laboratory-issued EMC certificate. The applicable conformity-assessment route and other relevant legislation must be established for the product.

Harmonized standards can provide a presumption of conformity for requirements they cover when the relevant references are published in the Official Journal. The latest international edition is not automatically the edition providing that presumption in a particular assessment. [1,9,10] Internal Market and SMEs

Multimedia, Industrial, and Laboratory Products

CISPR 32:2015 with Amendment 1:2019 addresses emissions from multimedia equipment. CISPR 35:2016 addresses immunity for multimedia equipment. Their separate scopes illustrate why emissions and immunity evidence must not be confused. [11]

CISPR 11:2024, seventh edition, addresses RF disturbance emissions from industrial, scientific, and medical equipment within its scope. It is not a complete immunity qualification. [12]

IEC 61326-1:2020 addresses emissions and immunity for measurement, control, and laboratory equipment within its scope. Applicable particular parts may add requirements for specific equipment types. [13]

For industrial products without a relevant dedicated product or product-family standard, IEC 61000-6-2:2016 and IEC 61000-6-4:2018 provide generic immunity and emissions frameworks. Their applicability must be established before use. [14]

IEC 61800-3:2022, including its 2025 corrigendum, provides EMC requirements for adjustable-speed power drive systems and machine tools. [15] IEC Webstore

Medical Devices

IEC 60601-1-2, consolidated Edition 4.1, addresses basic safety and essential performance in the presence of electromagnetic disturbances, as well as emissions from medical electrical equipment and systems. [16]

FDA recognition is partial, making the applicable recognition conditions important. The FDA’s June 2022 EMC guidance also addresses the information supporting premarket submissions. [4,16]

An EMC test result is one part of the medical-device evidence package. It is not, by itself, FDA clearance or approval.

Basic Test Methods Do Not Independently Define the Product Requirements

The IEC 61000-4 series contains methods for evaluating specific disturbances. Examples include IEC 61000-4-2:2025 for ESD immunity, IEC 61000-4-3:2020 for radiated RF immunity, and IEC 61000-4-6:2023 for immunity to conducted disturbances induced by RF fields. [17]

The applicable product or generic standard, regulatory framework, and risk assessment determine how relevant methods are used.

Similarly, harmonic-current emissions may require separate evaluation under IEC 61000-3-2 where its scope applies. A product’s RF emissions result does not answer that question. [18]

EMC, Electrical Safety, and Functional Safety Must Remain Coordinated

Product safety and EMC are related but distinct assessments.

Where equipment performs safety-related functions, IEC 61000-6-7:2014 provides industrial immunity requirements relevant to such functions within its scope. It does not independently establish compliance with the entire functional-safety framework. [20]

We recommend maintaining a clear connection among the applicable requirements, design decisions, and verification evidence. Passing one test should not become an unsupported claim that every obligation has been satisfied.

8. From a Passing Prototype to a Controlled Production Design

A successful prototype is an important milestone. The next responsibility is to preserve the basis of that result.

Control Changes That Could Affect EMC

We recommend reviewing component substitutions, PCB revisions, enclosure changes, interconnections, and relevant firmware changes for their potential effect on electromagnetic behavior.

The required response should be proportionate to the change. Not every revision requires repeating the entire test program, but neither should nominal electrical equivalence be accepted as automatic evidence of unchanged EMC performance.

For FCC-certificated equipment, 47 CFR 2.1043 establishes rules governing changes, including distinctions among changes that may be permitted and those requiring additional authorization action. [21]

The EU EMC Directive also requires procedures to maintain conformity in series production and consideration of relevant design changes. [9] eCFR

Document the Design That Was Actually Evaluated

Our recommended engineering record connects the tested configuration to the design and manufacturing information used to build the product.

The documentation should make clear which configuration was assessed, what modifications were incorporated, what conditions were evaluated, and what limitations remain.

This is especially important when development hardware has undergone several rounds of investigation.

Investigate Field Problems Without Premature Assumptions

A malfunction after deployment does not automatically establish that the original compliance assessment was invalid. It also should not be dismissed merely because a test report exists.

We recommend evaluating the actual configuration, environment, installation, and observed behavior.

The question may involve a product limitation, an integration issue, an unanticipated use condition, or a fault unrelated to EMC. The investigation should determine which explanation the evidence supports.

9. Why ELEXANA Is a Strong Choice

ELEXANA provides EMC design review, pre-compliance planning, EMI investigation, corrective-design consulting, and support for formal testing readiness. Our work extends from PCB-level concerns to integrated products and their operating environments. [22]

That breadth is particularly valuable when a failure cannot be resolved by examining a single component or repeating a standard test.

Demonstrated Redesign Experience

In a published surgical-robotics engagement, a manufacturer’s system could not pass EMC testing in its intended configuration. Five functions had been disabled in an effort to address the problem.

Working with the manufacturer, ELEXANA undertook corrective engineering that included redesigning two printed circuit boards and addressing system integration. The five functions were restored, and the redesigned system passed EMC testing in its restored functional configuration. [23] ELEXANA

The result illustrates the distinction between reducing functionality to accommodate an unresolved problem and engineering a solution that supports the intended product.

It is an example of a completed engagement, not a guarantee that every project will follow the same path or achieve the same outcome.

Product Knowledge Informed by Field Investigation

ELEXANA also investigates electromagnetic problems in operating facilities and complex systems. This provides a practical perspective on the relationship between product design and deployment conditions. [24]

For manufacturers, that perspective can help connect development decisions with the environment in which the equipment will be expected to perform.

Our role complements the manufacturer’s engineering team and the formal testing laboratory. We provide specialized investigation and design support; we do not replace required certification, regulatory review, or conformity assessment.

Actionable Engineering Support

Depending on the engagement, our work can include design-review findings, documented corrective recommendations, PCB revisions or annotations, verification planning, and support during implementation. [22]

We aim to provide information the development team can use to make decisions, not merely a collection of measurements.

Where the evidence is incomplete, we identify the uncertainty rather than present an unverified explanation as a demonstrated cause.

Independent Recommendations

ELEXANA does not sell mitigation products or receive commissions on recommended products. Our advice is therefore not tied to selling a predetermined filter, shielding system, or other remedy. [25]

We evaluate the engineering requirements and recommend an approach appropriate to the findings.

ELEXANA’s value is in helping manufacturers understand difficult electromagnetic problems and develop products that meet their requirements without unnecessary loss of capability.

10. Engineering the Product That Must Perform

Product development requires more than demonstrating that a prototype works under favorable conditions. It requires evidence that the intended product satisfies its applicable requirements and can perform dependably in its intended environment.

Electromagnetic Integrity Engineering™ connects that responsibility to design, investigation, corrective engineering, verification, and production control.

For ELEXANA, the objective is to help clients move from an unresolved electromagnetic problem to a technically justified design and a clear basis for evaluating it.

ELEXANA provides independent EMC engineering consulting for manufacturers, product developers, and engineering teams. Contact us to discuss a new design, a failed compliance test, an unresolved product malfunction, or a redesign that must preserve the functionality your customers need.

This article provides general engineering information. Applicable requirements, standard editions, conformity-assessment procedures, and acceptance criteria must be established for the particular product, intended use, and target market.

References

[1] European Commission, Electromagnetic Compatibility (EMC) Directive, regulatory overview and guidance. Accessed October 2026.

[2] Rohde & Schwarz, EMI Precompliance Testing, technical guidance. Accessed October 2026.

[3] M. Daimer, Simplify Low EMI Design with Power Modules, Texas Instruments, White Paper SLYY123, November 2017.

[4] U.S. Food and Drug Administration, Electromagnetic Compatibility (EMC) of Medical Devices: Guidance for Industry and Food and Drug Administration Staff, June 6, 2022.

[5] Texas Instruments, System-Level ESD Protection Guide, Application Note SSZB130E, August 2025.

[6] Federal Communications Commission, Modular Transmitters, 47 CFR 15.212; and Office of Engineering and Technology, Module Integration Guide, Knowledge Database Publication 996369 D04, version 02. Accessed October 2026.

[7] IEEE, American National Standard for Evaluation of Wireless Coexistence, ANSI C63.27-2021, published 2022, including applicable corrigenda.

[8] Federal Communications Commission, Equipment Authorization and Equipment Authorization Procedures, Office of Engineering and Technology. Accessed October 2026.

[9] European Parliament and Council, Directive 2014/30/EU on the Harmonisation of the Laws of the Member States Relating to Electromagnetic Compatibility, February 26, 2014, as amended. Consolidated text dated May 30, 2026.

[10] European Commission, Radio Equipment Directive (RED), regulatory overview and guidance concerning Directive 2014/53/EU. Accessed October 2026.

[11] International Electrotechnical Commission, Electromagnetic Compatibility of Multimedia Equipment: Emission Requirements, CISPR 32:2015+AMD1:2019, consolidated Edition 2.1; and Electromagnetic Compatibility of Multimedia Equipment: Immunity Requirements, CISPR 35:2016, first edition.

[12] International Electrotechnical Commission, Industrial, Scientific and Medical Equipment: Radio-Frequency Disturbance Characteristics, Limits and Methods of Measurement, CISPR 11:2024, seventh edition, 2024.

[13] International Electrotechnical Commission, Electrical Equipment for Measurement, Control and Laboratory Use: EMC Requirements, Part 1: General Requirements, IEC 61326-1:2020, third edition, 2020.

[14] International Electrotechnical Commission, Electromagnetic Compatibility, Part 6-2: Generic Standards, Immunity Standard for Industrial Environments, IEC 61000-6-2:2016; and Part 6-4: Generic Standards, Emission Standard for Industrial Environments, IEC 61000-6-4:2018.

[15] International Electrotechnical Commission, Adjustable Speed Electrical Power Drive Systems, Part 3: EMC Requirements and Specific Test Methods for PDS and Machine Tools, IEC 61800-3:2022, fourth edition, including Corrigendum 1:2025.

[16] International Electrotechnical Commission, Medical Electrical Equipment, Part 1-2: General Requirements for Basic Safety and Essential Performance, Collateral Standard: Electromagnetic Disturbances, Requirements and Tests, IEC 60601-1-2:2014+AMD1:2020, consolidated Edition 4.1. See also U.S. FDA recognition no. 19-36 and its conditions of recognition.

[17] International Electrotechnical Commission, Electromagnetic Compatibility, Part 4: Testing and Measurement Techniques, selected publications: IEC 61000-4-2:2025, Electrostatic Discharge Immunity Test; IEC 61000-4-3:2020, Radiated, Radio-Frequency, Electromagnetic Field Immunity Test; and IEC 61000-4-6:2023, Immunity to Conducted Disturbances, Induced by Radio-Frequency Fields.

[18] International Electrotechnical Commission, Electromagnetic Compatibility, Part 3-2: Limits, Limits for Harmonic Current Emissions, Equipment Input Current Not Exceeding 16 A per Phase, IEC 61000-3-2:2018+AMD1:2020+AMD2:2024, consolidated Edition 5.2, including applicable interpretation sheets.

[19] International Electrotechnical Commission, Audio/Video, Information and Communication Technology Equipment, Part 1: Safety Requirements, IEC 62368-1:2023, fourth edition, corrected version August 2025.

[20] International Electrotechnical Commission, Electromagnetic Compatibility, Part 6-7: Generic Standards, Immunity Requirements for Equipment Intended to Perform Functions in a Safety-Related System in Industrial Locations, IEC 61000-6-7:2014, 2014.

[21] Federal Communications Commission, Changes in Certificated Equipment, 47 CFR 2.1043. Electronic Code of Federal Regulations, accessed October 2026.

[22] ELEXANA LLC, EMC Compliance Consulting, service description. Accessed October 2026.

[23] ELEXANA LLC, Surgical Robotics: From EMC Failure to Full-Function Compliance, published case study. Accessed October 2026.

[24] ELEXANA LLC, EMF Testing, EMI Investigations, and EMC Consulting, company capabilities and technical-leadership information. Accessed October 2026.

[25] ELEXANA LLC, No Conflicts of Interest Policy. Accessed October 2026.