Rohde & Schwarz ESU40 | 20 Hz – 40 GHz

FCC Part 15 is a section of Title 47, Part 15 of the Code of Federal Regulations, a set of Federal Communications Commission (FCC) rules and regulations for unlicensed transmissions. FCC Part 15 applies to most electronics devices sold inside the United States, governing their levels of intentional, unintentional and incidental emissions.   Subpart A: Incidental Radiators An incidental radiator (defined in Section 15.3 (n)) is an electrical device that is not designed to intentionally use, intentionally generate or intentionally emit radio frequency energy over 9 kHz. However, an incidental radiator may produce byproducts of radio emissions above 9 kHz and cause radio interference. A product that is classified as an incidental radiator device is not required to obtain an equipment authorization. Nonetheless, the incidental radiator is regulated under the general operating conditions of Section 15.5 and if there is harmful interference the user must stop operation and remedy the interference. Manufacturers and importers should use good engineering judgment before they market and sell these products, to minimize possible interference (Section 15.13). Examples of products that are classified as incidental radiators include AC and DC motors, mechanical light switches, basic electrical power tools (that do not contain digital logic).   Subparts B & G: Unintentional Radiators An unintentional radiator (defined in Section 15.3 (z)) is a device that by design uses digital logic, or electrical signals operating at radio frequencies for use within the product, or sends radio frequency signals by conduction to associated equipment via connecting wiring, but is not intended to emit RF energy wirelessly by radiation or induction. Today the majority of electronic-electrical products use digital logic, operating between 9 kHz to 3000 GHz and are regulated under 47 CFR Part 15 Subpart B. Examples include coffee pots, wristwatches, cash registers,

EN 55011 is a product family standard (largely based on CISPR 11) for industrial, scientific and medical (ISM) equipment and electro-discharge machining (EDM) and arc welding equipment. This standard sets forth procedures for the measurement of radio-frequency (RF) disturbances and limits within the frequency range of 9 kHz to 400 GHz. Requirements for ISM lighting apparatus and UV irradiators operating at frequencies within the ISM frequency bands defined by the ITU Radio Regulations are also contained in EN 55011. ISM equipment or appliances tested against EN 55011 under the EMC Directive are designed to generate and use locally, RF energy for industrial, scientific, medical, domestic or similar purposes, excluding applications in the field of telecommunication. Typical ISM applications are the production of physical, biological, or chemical effects such as heating, ionization of gases, mechanical vibrations, hair removal and acceleration of charged particles. Compliance with this standard gives a partial presumption of conformity with the European EMC Directive, 2004/108/EC. EN 55011 is an emission only standard covering radiated and conducted emissions. Most products will also require an assessment of immunity standards, such as: (1) EN 61326-1 – Electrical equipment for measurement, control, and laboratory use; or (2) EN 61000-6-2 – Generic Standards Immunity for industrial environments. These aforementioned two specifications contain additional requirements for electromagnetic interference and transient phenomenon. Additionally, devices powered via AC mains may require additional testing for power line harmonics and power line flicker. Although the term medical is in the title of this standard, EN 55011 does not apply directly to medical devices within the scope of the Medical Device Directive 93/42/EEC. The reason is that for medical devices falling within the scope of 93/42/EEC, the EMC directive does not apply directly, but