![]() Several antennas – including a magnetic field probe for RE101, a monopole rod antenna for RE102 and CISPR 25, and biconical and double-ridge guide horn antennas for RE102, CISPR 11 and CISPR 25 tests.A line impedance stabilization network (LISN) or artificial network (AN) – as detailed extensively in part 1 – that provides a definite and constant impedance (close to 50 Ω) across the EUT power terminals over the applicable test frequency range.An EMI receiver or spectrum analyzer – with the appropriate peak (PK), quasi-peak (QP) or average (AV) detector as defined in CISPR 16-1-1.The primary test equipment required to conduct RE tests includes: These test procedures verify that magnetic and electric field emissions from the equipment under test (EUT) and its associated cabling do not exceed specified requirements. In MIL-STD-461G, carrying out RE101 (magnetic field) and RE102 (electric field) tests in the frequency range of 30 Hz to 100 kHz and 10 kHz to 18 GHz, respectively, fulfills RE requirements. As outlined in a later section, the applicability of the tests in CISPR 11 depends on the equipment’s intended installation environment. Testing in CISPR bands C and D over a frequency range of 30 MHz to 1 GHz in accordance with the scope of CISPR 11 fulfills RE requirements for products manufactured in ISM applications. Applicability and test frequency rangesĬomponents and modules intended for onboard automotive applications are tested according to CISPR 25 over a total frequency range of 150 kHz to 2.5 GHz. Department of Defense maintains MIL-STD-461.Ī. CISPR has subcommittees B and D responsible for CISPR 11 and 25, respectively, whereas the U.S. Much like the treatment of conducted emissions in part 1 of this two-part article series, the comparison includes widely used EMC standards in each industry : Comité International Spécial des Perturbations Radioélectriques (CISPR) 25 edition 4 from 2016, a product standard for the protection of onboard receivers in vehicles, boats and internal combustion engines CISPR 11 edition 6 from 2015, a product standard for industrial, scientific and medical (ISM) equipment and military standard MIL-STD-461 revision G from 2015, a defense standard for equipment and subsystems enclosures. This article compares electromagnetic compatibility (EMC) requirements in automotive, industrial and defense product family standards, specifically various test parameters, test equipment, test setups and test methods for radiated emissions (REs). ![]() ![]() By Timothy Hegarty, Applications Engineer, Texas Instruments ![]()
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