Conducted Emissions
Measure RF disturbances on applicable AC mains connections under the required Part 15 limits and measurement setup.
FCC Part 15 Testing
FCC Part 15 Testing for Electronic and Wireless Products
Stancer Testing-Lab provides FCC Part 15 testing for electronic and wireless products intended for the U.S. market. We work with engineering teams worldwide to evaluate applicable emissions and transmitter requirements and prepare the supporting technical reports. The program depends on the product: digital electronics may need Subpart B emissions testing, while licence-exempt transmitters may fall under Subpart C, Subpart E or another applicable Part 15 subpart. We confirm the rule sections, operating modes and method-specific accredited scope before testing. For submission planning, read our FCC and ISED certification guide. Updating an approved design? Review FCC permissive changes before releasing the revision.FCC Part 15 Compliance Measurements
Measurements are selected for the applicable FCC rule section and product configuration. A transmitter program and a digital-device emissions program can require different tests and measurement methods.
Radiated Emissions
Evaluate emissions from digital electronics and other applicable unintentional radiators in the required operating configurations.
Transmitter Output Power
Measure conducted or radiated transmitter power as required for the technology, antenna configuration and applicable rule section.
Bandwidth and Spectral Density
Evaluate the required bandwidth and, where applicable, power spectral density. The metric and measurement settings depend on the rule.
Band-Edge Measurements
Evaluate emissions at the edges of the operating band against the applicable limits, using the required detector and measurement bandwidth.
Spurious and Unwanted Emissions
Measure harmonics and other unwanted transmitter emissions. Applicable limits and frequency ranges depend on the operating band and rule section.
FCC Part 15 Subpart B Testing
FCC Part 15 Subpart B addresses unintentional radiators, including many digital devices and electronic products. We evaluate applicable conducted emissions and radiated emissions using the required configuration and measurement procedures. The assessment considers Class A or Class B requirements, power supplies, ports, cables, accessories and representative operating modes. ANSI C63.4 methods are used as applicable. Exemptions and equipment authorization requirements must be reviewed for the specific product.
Choose the Right FCC Part 15 Test Program
Subpart B: digital electronics
Applicable emissions testing for digital devices and other unintentional radiators. Review Class A or Class B limits and the complete product configuration.Subparts C and E: transmitters
For licence-exempt radios, identify the operating band and applicable rule section. Wi-Fi and Bluetooth RF testing may involve different requirements by band and technology.Host and module integration
Review module grant conditions, antennas, simultaneous transmission, host emissions and RF exposure. See wireless device compliance testing for the wider program.Match the Rule to the Product
| Product function | Requirements to review | Planning point |
|---|---|---|
| Digital electronics | Part 15 Subpart B | Determine applicable emissions limits, exemptions and SDoC or certification requirements. |
| Many 2.4 GHz licence-exempt radios | Applicable Subpart C sections, such as 15.247 | Technology and operating parameters determine the rule and measurement program. |
| U-NII equipment | Part 15 Subpart E | Band and device category affect requirements. Agree the pathway for DFS and other specialist functions. |
| Other radio technologies | Other applicable Part 15 subparts or licensed-radio rules | Cellular and other licensed-radio devices are not automatically covered by Part 15. |
| ISM equipment | Part 18, where applicable | Part 18 is a separate framework; an industrial or medical application alone does not establish its applicability. |
Prepare Your Product for Testing
- 01
Define the product
Provide radio functions, operating bands, intended use and the electronic product configuration. - 02
Supply the controls
Include firmware and instructions for stable channel, mode, bandwidth and output-power settings. - 03
Bring the full setup
Use production antennas, power supplies, cables, accessories and representative host equipment. - 04
Share existing evidence
Include module grants, integration instructions, earlier reports, diagrams and proposed labeling.
From Product Review to Equipment Authorization
Testing generates evidence for the applicable authorization route. The product manufacturer and responsible party retain their compliance obligations; where certification is required, the certification decision is made by the appropriate recognized TCB.
Product Review
Identify digital circuitry, radio functions, operating frequencies, antenna options and intended use.
Test Plan
Select the rule sections, methods, limits and required worst-case configurations. Review accredited coverage and any specialist testing pathway.
Laboratory Measurements
Evaluate the agreed configurations and record emissions or transmitter measurements against the applicable requirements.
Technical Report
Document the setup, operating modes, measurement data and results. Review any findings that require corrective work or retesting.
Authorization Route
Prepare the evidence for SDoC or the applicable certification submission. A recognized TCB makes the certification decision where required.
Compliance Documentation
Address the required labeling, user information and responsible-party obligations. Confirm applicable authorization before marketing.
FCC Part 15 Testing FAQs
Practical answers for electronic products, radio modules and licence-exempt transmitters.
What is FCC Part 15 testing?
It evaluates applicable RF emission limits and transmitter requirements for electronic or licence-exempt radio products intended for the U.S. market. The rule section and product configuration determine the tests.
What is the difference between Subparts B, C and E?
Subpart B covers unintentional radiators such as many digital devices. Subpart C addresses many intentional radiators; Subpart E covers U-NII devices. Other technologies can fall under other Part 15 subparts or licensed-radio rules.
Does every product require FCC certification?
No. FCC equipment authorization uses certification or Supplier’s Declaration of Conformity (SDoC), as specified for the device. Many unintentional radiators use SDoC; most Part 15 intentional radiators require certification, subject to the applicable exceptions.
Who issues the certification decision?
Where FCC certification is required, a recognized Telecommunication Certification Body (TCB) reviews the application and issues the grant. Laboratory testing and reports provide supporting evidence; a test report itself is not a certification grant.
Does a certified module cover the complete host product?
Not automatically. The integration must satisfy its approval conditions. Host emissions, antenna changes, simultaneous transmission and RF exposure can require additional review, measurements or authorization.
Can FCC testing be performed outside the United States?
Yes, when the laboratory and testing satisfy the applicable FCC requirements. Stancer works with teams internationally and confirms the required methods and laboratory recognition or accredited scope for the project.
Can FCC and ISED testing be coordinated?
Yes, where the methods and configurations allow. Canadian RSS or ICES requirements and the Canadian approval route remain separate; FCC authorization alone does not establish ISED compliance.
What should I provide before FCC Part 15 testing?
Provide the product description, target rule or market information, schematics, block diagrams, antenna details, power supplies, cables, accessories and test-mode controls. Share module grants or existing reports when available.
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.