Conducted Emissions Testing
Conducted emissions testing measures unwanted RF noise carried by a product’s power leads and, where applicable, wired communication ports. Stancer Testing-Lab evaluates the disturbance against the limits for the product, connection and intended markets.
Our engineers review the operating modes, supplies, loads and cable arrangements, then select the measurement network and receiver settings required by the method. Testing can form part of a formal EMC testing program or a pre-compliance investigation, with accredited coverage confirmed against our scope.
What Conducted EMI Testing Helps You Assess
Port Emissions and Margin
Compare disturbance levels on the required conductors and ports against the applicable limits.
Noise Sources and Operating Modes
Investigate switching supplies, converters, controllers and connected loads to identify significant measured emissions.
Mitigation and Documentation
Compare filter, grounding and cable changes using a repeatable configuration, then document the measurement evidence.
Conducted Measurements, Standards and Preparation
9 kHz to 30 MHz
Published conducted measurement capability. The standard and port determine the actual test band and suitable network.Up to 200 A, Three-Phase
High-current setup capability, subject to the selected network, voltage, frequency range and equipment configuration.Applicable Emissions Standards
The product, port and target markets determine the required conducted measurements. Supply ports and communication ports can use different networks and arrangements; the applicable method is agreed before testing.| Reference | Typical application | What we confirm |
|---|---|---|
| CISPR 11 | Applicable industrial, scientific and medical equipment | Equipment group/class, required ports, limits and measurement network. |
| CISPR 32 / EN 55032 | Applicable multimedia equipment | Equipment class, port category, coupling network and relevant operating modes. |
| FCC Part 15 Subpart B | Applicable electronic and digital equipment | AC mains conducted measurements from 150 kHz to 30 MHz where required. |
| ICES-003 | Applicable information technology and digital apparatus | Canadian requirements, equipment class and applicable measurement procedures. |
Our Test Sequence
- Plan. Identify the required ports, limits, band, modes and supply arrangements.
- Configure. Select the LISN or other specified network, grounding arrangement and representative loads.
- Scan. Use Peak measurements to locate significant emissions on the relevant connections.
- Measure. Apply the specified final detectors, bandwidths, measurement times and corrections.
- Report. Compare results with limits and document the tested configuration and assessment.
Prepare Your Product for Testing
Provide the supply voltage and current, phase configuration, AC or DC connections, operating modes, representative loads and cable/port details. Bring the production power supply, accessories, firmware and instructions needed to operate the product. Complete the EMC & RF client information sheet and upload its PDF through the contact form. Electrical ratings and connection details are especially important for high-current setups.Laboratory Capabilities and Reporting
We use LISNs and the Rohde & Schwarz ESW44 receiver for applicable conducted measurements. Peak scans locate significant disturbances; final measurements use Quasi-Peak and Average detection where required, with prescribed bandwidths and measurement times. The published 9 kHz to 30 MHz range and 200 A three-phase capability are setup limits, not conditions supported by every network or standard. We confirm the voltage, current basis, band and connections before scheduling. Supply filtering controls external conducted noise, while suitable power sources support the agreed operating conditions. See our laboratory capabilities. Results can support applicable FCC, ISED and CE marking documentation. Other emissions, immunity or radio requirements may also apply to the finished product.Conducted Emissions Testing FAQs
How do conducted and radiated emissions differ?
Conducted testing measures disturbances on specified connections. Radiated testing measures energy emitted through space. Passing one does not establish compliance with the other.
Is every conducted test performed from 150 kHz to 30 MHz?
No. That band applies to many AC mains requirements, including applicable FCC Part 15 measurements. Other ports and methods may require different bands; our broader published conducted capability begins at 9 kHz.
Can you help investigate a failed test?
Yes. Pre-compliance investigations can compare operating modes and proposed filter, layout or cable changes. We document the setup and compare measurements to guide the next step.
What affects testing time and cost?
The number of ports, supply arrangements, operating modes, standards and reporting requirements determines the work. High-current equipment and troubleshooting can require additional preparation and setup time.
Plan your testing
Let’s move your product toward market.
Tell us about your product, testing needs, and target markets. Our technical team will help define the scope and prepare a tailored quotation.