Electromagnetic Field Radiation (EMF), Interference (EMI), and Compatibility (EMC) Consulting Services
Surveys, Inspections, Investigations, Assessments, Deep Measure Analysis and Diagnostics, Predictive Simulations and Advanced Design Modeling, EMF-EMI Mitigation and EMC Pre-Compliance Consulting Services
EMI-EMC-EMF Engineering for Compliance, Health, Safety, and Design Integrity
Commercial — EMF-EMI-EMC Site Surveys, Inspections, and Investigations with Solutions
High-End Residential and Commercial — ALARA EMF-EMI New Construction Design Consulting Services
Princeton, New Jersey
ELEXANA is an award-winning industry leader in EMF, EMI, and EMC Electromagnetic Consulting Services. Our international reputation began in 2018, when we quietly solved the ADAS (Advanced Driver Assistance Systems) used in almost every new automobile. We are known for providing comprehensive on-site testing, survey assessments, root-cause identification and attenuation, investigations, inspections, and solutions to complex Electromagnetic Interference (EMI), Electromagnetic Compliance (EMC) Design, Electromagnetic Field Radiation (EMF), and Radio Frequency Interference (RFI) problems.
EMCpass.net
ISO 17025 Certified Calibrated Surveys to National and International Standards
We are General Liability and Professional Liability Insured.
ELEXANA supplies a diverse array of electromagnetic radiation consulting services.
Here are a few:
EMI-EMC-EMF Forensic Investigations identify and solve the causes of malfunctioning equipment in industrial, scientific research, and medical centers.
EMC Pre-Compliance Consulting includes on-site or in-lab testing, EMI/RFI troubleshooting, EMC/EMI mitigation design, and EMI filter design for products in development.
New Construction Building Design EMI-EMC Consulting for IT & data centers, production studios, laboratories, airports, hospitals, medical centers, high-end residential, and community development projects.
EMF/EMI/EMC Surveys for Implanted Medical Devices, Electrical Power, and Telecom Installations; ISO-17025 and OSHA Certified. > We now have a dedicated electrical engineer, Phillip D., with thirty years of field experience, who worked for the company that makes our survey test equipment. He specializes in conducting this fieldwork for us and leads the ELEXANA Field Test Division.
Magnetic, RF Faraday, TEMPEST, and HEMP Shield Consulting, including shielding effectiveness testing, shielding design, and material effectiveness testing.
Ground System Consulting, including 4-Point Wenner Soil Resistivity Testing, Kelvin 3-Point Testing, energized ground testing, micro-ohmeter bond testing, and grounding design.
Electrical Power Consulting, including Three-Phase 5-wire and Single-Phase 4-wire I-V analysis, transient testing, SNR, THD, I-V Trend datalogging, infrared tests, wire tracing, deep measure, voltage drop (%), and conducted emissions.
Testimonials
☀️☀️☀️☀️☀️
“The director of the new documentary "Generation Zapped" will be on my show next week, and the film inspired me to get EMF (electromagnetic field) testing for my own home. I was a bit nervous about it because there is a lot of charlatanism in all these "alternative" services, but OMG, what a fabulous company and what a wonderful person did this testing for us! Jim from Elexana was so thorough, so knowledgable, so patient, and so understanding. How refreshing to deal with a company that is trustworthy, does what they'll say they do, doesn't promise miracles, and doesn't try to sell you a bunch of extra stuff." - Victoria Moran, Author, Speaker, Vegan Lifestyle Coach, Director Main St. Vegan Academy, training & certifying Vegan Lifestyle Coaches at Main Street Vegan
“Jim was excellent. He is an expert in his field, and pointed out simple things we could do to help improve the quality of our home life. Peace of mind is priceless, and this costs a lot less than that! Well worth it.” - Scott Harris, of Brown, Harris, Stevens, NYC’s residential real-estate company
“I want to thank Elexana and it’s staff for the tremendous insight, knowledge, and help they provided my family and me. By testing all of the electromagnetic fields in our New York City apartment and changing our habits, my wife now sleeps easier and we all feel healthier in our environment! Thank you again, Elexana!” - Jay Zimner, NYC’s residential real-estate attorney
“Elexana offers the most comprehensive EMF testing. Jim (the owner) is wildly knowledgeable, has many years of experience, is deeply kind, sincere, and honest. I felt confident learning from an expert who has worked in NYC extensively and who understands the ins and outs of how this city works.” - Meredith Geller, Holistic Nutritionist, The Elevated Life, NYC
Read more testimonials…
OSHA-certified
NFPA® 70E Certified Grounding and Bonding Testing
ANSI/AEMC Engineered Trained
A Member of the Bioelectromagnetics Society
A Member of the NFPA® National Fire Protection Association
A Member of the Electromagnetic Compliance Society of the IEEE
A Member of the IEEE New York Chapter
D-U-N-S Registered
E-Verified and Approved by Homeland Security
HIPAA-compliant
Here you see our current sensor probe and Tektronix oscilloscope working together to read the EMI on an Apple Trackpad II. Rather than the sine wave being a smooth 60 Hertz wave, it is very jagged. Notice the 645.9 kHz Frequency. Copyright ©2020
Elexana considers the complexities of reflection, radiative/capacitive/inductive/conductive/resonant/magnetic phase-synchronous coupling, signal density and phase coherence, trace integrity, oscillation, multi-path interference, pulse-rate modulation, cross-talk, grounding system testing, and more.
Here, you will find information to help understand the difference between the types of EMI Consulting Services and what to look for in a company offering EMI Testing Solutions.
EMI Survey
Definition: An electromagnetic interference EMI survey is a scientific assessment of the unintended conductive and radiative emissions that may interfere with the functioning of electronic equipment or systems.
Purpose:
Check background EMI/EMF levels.
Verify compliance with environmental standards.
Identify hotspots or areas at risk of interference.
It is often done proactively as part of site qualification, especially in sensitive environments like hospitals, labs, or data centers.
Scope:
Wide area or whole system.
Focused on characterizing the environment, not necessarily finding the cause of a specific problem.
May involve long-term monitoring or periodic checks.
Key Features of an EMI Survey
1. Detailed Measurement of Electromagnetic Fields.
Uses calibrated instruments (spectrum analyzers, EMI receivers, near-field probes, antennas, field strength meters) to quantify electromagnetic emissions across defined frequency ranges.
Captures both radiated and conducted emissions.
2. Baseline EMI Environment Assessment.
Maps out the existing electromagnetic environment in a site (facility, lab, data center, hospital, etc.).
Identifies background EMI sources (external: like nearby radio transmitters; internal: like industrial machinery or IT equipment).
3. Compliance Verification.
Compares measured emissions and susceptibility levels to relevant EMC standards (FCC Part 15, IEC 61000, MIL-STD-461, CISPR standards, etc.).
Ensures systems are within acceptable EMI limits.
4. Identification of Potential Risks.
Highlight equipment or locations that are vulnerable to EMI issues.
Identifies EMI “hot spots” where emissions may exceed thresholds or pose interference risks.
5. Comprehensive Site or System Coverage.
Includes multiple locations across a site (rooms, floors, equipment racks, shielded enclosures).
Often includes checks for airborne (radiated) and line-bound (conducted) interference.
6. Use of Specialized Measurement Techniques.
Near-field vs. far-field probing.
Broadband vs. narrowband scans.
Time-domain or frequency-domain analysis.
7. Reporting and Documentation.
Provides detailed measurement data, spectral plots, field maps, and tables.
Includes a written summary of findings, risk assessment, and recommendations for mitigation (if needed).
8. Support for Further Investigation or Design Improvement.
Acts as the foundation for:
EMC design improvements.
Shielding or filtering upgrades.
Root-cause investigations are conducted if specific EMI problems are uncovered.
Where Are EMI Surveys Used?
Hospitals (to protect sensitive medical devices).
Data centers (to ensure reliable IT performance).
Manufacturing facilities (to safeguard automated systems and robotics).
Research labs (where precision measurements are EMI-sensitive).
Military or aerospace sites (where strict EMC standards apply).
Office or residential towers (especially near strong RF emitters).
EMI Investigations
Definition: An EMI investigation is a targeted diagnostic process triggered by a specific problem or suspected interference. It aims to identify, isolate, and resolve the root cause.
Purpose:
Understand why a device or system is malfunctioning or failing EMC tests.
Trace the specific interference source (internal or external).
Recommend solutions (shielding, grounding, filtering, redesign, etc.).
Scope:
Narrowed to the system or components involved in the failure.
Involves deeper, often more technical, analysis (including circuit-level reviews or near-field probing).
EMI Investigation: Required Skills & Knowledge
Deep Technical Knowledge of EMC Principles
Understanding of coupling mechanisms (conducted, radiated, common-mode, differential-mode)
Familiarity with shielding, filtering, and grounding techniques
Advanced Measurement & Diagnostic Tools
Skilled use of near-field probes, current clamps, LISNs (line impedance stabilization networks), oscilloscopes, time-domain tools
Ability to interpret detailed measurement data, not just record it
Circuit-Level & System-Level Understanding
Ability to trace interference paths through PCBs, wiring, and enclosures
Knowledge of how system design choices affect EMI performance
Knowledge of Compliance & Regulatory Requirements
Familiarity with specific test standards (FCC Part 15, CISPR 22, MIL-STD-461, RTCA/DO-160, etc.)
Understanding pre-compliance vs. complete compliance testing requirements
Analytical & Problem-Solving Skills
Ability to hypothesize, isolate, and test root causes
Experience applying design fixes or mitigation solutions
Hands-On Engineering Skills
Sometimes requires rework of circuits, adding ferrites, redesigning layouts, or modifying enclosures.
Main Steps Involved in an EMI Investigation
Define the Problem Clearly
Identify and document:
The observed issue (e.g., system malfunction, data loss, communication failure, equipment reset).
When and where it occurs (specific times, locations, conditions).
The systems or devices are affected.
Any history of the problem or previous attempts to solve it.
Review Background Information
Gather:
System designs, schematics, and prior EMI/EMC reports.
Equipment manuals and susceptibility specs.
Environmental conditions (e.g., nearby transmitters, power disturbances, machinery).
Develop an Investigation Plan
Define:
What measurements are needed (radiated, conducted, near-field, time-domain).
The tools and instruments should be used (spectrum analyzers, oscilloscopes, TDRs, probes).
The test points and environmental factors to assess.
Conduct Targeted Measurements
Perform on-site tests to:
Identify EMI sources (external or internal).
Map interference paths (how it couples into sensitive systems).
Measure EMI levels vs. system susceptibility thresholds.
Use advanced techniques:
Near-field scanning, source localization.
Time-domain analysis of transient events.
Monitoring under different operating conditions.
Perform Root-Cause Analysis
Trace the exact mechanism causing the problem:
Is it radiated or conducted?
Common-mode or differential-mode coupling?
Ground loops, shielding failure, cable crosstalk, or parasitic coupling?
Correlate findings with system behavior.
Recommend Mitigations
Propose practical solutions, such as:
Shielding improvements.
Filter or ferrite installations.
Grounding or bonding adjustments.
Cable rerouting or equipment relocation.
Design modifications (if needed).
Validate Fixes (Optional but Ideal)
After applying fixes, re-measure and confirm that the interference problem is resolved.
Document the Investigation
Provide a detailed report with:
Description of the problem.
Measurement data and analysis.
Root-cause findings.
Recommended solutions and their technical basis.
Confirmation of resolution (if tested).
Where Are EMI Investigations Used?
Hospitals: When life-critical medical devices malfunction.
Data centers: When servers crash or communication links drop.
Industrial sites: When control systems or sensors behave unpredictably.
Military/aerospace: When mission-critical or safety-critical systems face unexplained disturbances.
Research labs: When precision instruments show unexplained noise or instability.
What’s Special About EMI Investigations?
Highly targeted — focus on solving an active or suspected interference problem.
More advanced tools and techniques — beyond general surveys or inspections.
It requires deep expertise and is often handled by senior EMI/EMC engineers or specialists.
Outcome-driven — the goal is not just to measure, but to explain, solve, and verify.
EMI Inspections
Main Steps Involved in an EMI Inspection
Define Inspection Purpose and Scope
Clarify why the inspection is being done:
Pre-installation or pre-commissioning check.
Routine compliance or maintenance check.
Visual assessment for potential EMI risks.
Define which systems, equipment, or areas will be inspected.
Review Design and Documentation
Examine:
Grounding and bonding schematics.
Cable routing and shielding layouts.
Equipment placement relative to known EMI sources.
Check that installed systems match design specifications and applicable EMC/EMI standards.
Perform Visual and Physical Inspection
Inspect:
Physical integrity of shielding, gaskets, and enclosures.
Proper grounding and bonding connections.
Cable management — are signal and power lines properly separated? Are shield terminations correctly done?
Placement of sensitive equipment relative to known EMI emitters.
Conduct Spot Checks (If Needed)
Use portable meters or handheld EMI detectors to:
Check for obvious hot spots.
Verify grounding continuity.
Confirm shield effectiveness (simple checks, not full lab-grade measurements).
Assess Compliance and Best Practices
Evaluate:
Whether installations follow EMC design best practices.
Whether systems comply with applicable EMI standards or client-specific requirements.
Identify potential risks or vulnerabilities, even if no current EMI issue is reported.
Document Findings
Provide a report with:
Summary of visual and physical findings.
List of compliance issues or areas needing improvement.
Photos or diagrams showing key points.
Recommended corrective actions or improvements.
Recommend Next Steps (If Needed)
If problems or risks are found:
Recommend further testing (complete EMI survey or investigation).
Suggest practical fixes (e.g., improving grounding, adding ferrites, improving cable shielding).
EMI Inspections Apply to:
New or renovated installations (before going live).
Hospitals, labs, and data centers — ensuring environments are adequately prepared for sensitive equipment.
Industrial or commercial sites — periodic compliance checks or maintenance audits.
Construction or renovation projects — ensuring EMI-sensitive design elements are implemented correctly.
What’s Not Typically Included?
Full spectral or quantitative EMI measurements (requires an EMI survey).
Deep root-cause troubleshooting or engineering fixes (belongs to an EMI investigation).
Regulatory certification or test lab work.
Here’s a clear summary of what is involved with an EMI investigation, which is the most advanced and targeted EMI service compared to surveys or inspections:
Main Steps Involved in an EMI Investigation
Define the Problem Clearly
Identify and document:
The observed issue (e.g., system malfunction, data loss, communication failure, equipment reset).
When and where it occurs (specific times, locations, conditions).
What systems or devices are affected?
Any history of the problem or previous attempts to solve it.
Review Background Information
Gather:
System designs, schematics, and prior EMI/EMC reports.
Equipment manuals and susceptibility specs.
Environmental conditions (e.g., nearby transmitters, power disturbances, machinery).
Develop an Investigation Plan
Define:
What measurements are needed (radiated, conducted, near-field, time-domain).
Tools and instruments to use (spectrum analyzers, oscilloscopes, TDRs, probes).
Identify test point locations and environmental factors to assess.
Conduct Targeted Measurements
Perform on-site tests to:
Identify EMI sources (external or internal).
Map interference paths (how it couples into sensitive systems).
Measure EMI levels vs. system susceptibility thresholds.
Use advanced techniques:
Near-field scanning, source localization.
Time-domain analysis of transient events.
Monitoring under different operating conditions.
Perform Root-Cause Analysis
Trace the exact mechanism causing the problem:
Is it radiated or conducted?
Common-mode or differential-mode coupling?
Ground loops, shielding failure, cable crosstalk, or parasitic coupling?
Correlate findings with system behavior.
Recommend Mitigations
Propose practical solutions, such as:
Shielding improvements.
Filter or ferrite installations.
Grounding or bonding adjustments.
Cable rerouting or equipment relocation.
Design modifications (if needed).
Validate Fixes (Optional but Ideal)
After applying fixes, re-measure and confirm that the interference problem is resolved.
Document the Investigation
Provide a detailed report with:
Description of the problem.
Measurement data and analysis.
Root-cause findings.
Recommended solutions and their technical basis.
Confirmation of resolution (if tested).
Where Are EMI Investigations Used?
Hospitals: When life-critical medical devices malfunction.
Data centers: When servers crash or communication links drop.
Industrial sites: When control systems or sensors behave unpredictably.
Military/aerospace: When mission-critical or safety-critical systems face unexplained disturbances.
Research labs: When precision instruments show unexplained noise or instability.
What’s Special About EMI Investigations?
Highly targeted — focus on solving an active or suspected interference problem.
More advanced tools and techniques — beyond general surveys or inspections.
It requires deep expertise and is often handled by senior EMI/EMC engineers or specialists.
Outcome-driven — the goal is not just to measure, but to explain, solve, and verify
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