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Many products will encounter problems during the process of EMC compliance testing. Depending on the types of electronics used in the product, EMC problems may consist of emissions, immunity or a combination of both. Waiting to perform EMC testing until the first customer ship date is a risky approach. This is why EMC Integrity provides engineering-level EMC immunity and emission testing for all tests that will be required for full compliance. These “pre-scans” are abbreviated tests which give the product designer a high degree of confidence that their product will comply when the formal testing is performed.
By performing pre-scan testing earlier in the design cycle, potential compliance problems may be identified at a time when changes to the product are more easily made, and done so in a more cost-effective manner. It is preferable to perform this testing prior to the final turn of the PCBs, so that changes required for compliance may be incorporated into the final board revision. This has a number of advantages. Most notable among these are that it will save the client money and it ensures the EMC fixes are incorporated as part of the basic build. For more information, click on $550 2-hour Radiated Emissions (RE) Pre-scan.
Clients may also choose to draw from EMCI’s deep well of experience to assist in solving their more difficult EMC problems. The technical staff at EMC Integrity can assist you in optimizing your pre-scan test matrix. For more information, or to learn more about EMC Integrity’s testing, trouble-shooting, mitigation and design capabilities, Contact Us.
Historical Note
In the United States, since the early 1980’s, compliance with FCC requirements for radiated and conducted emissions has been enforced. These limits were designed to protect intentional receivers (initially televisions and radios) having sensitivities in the 10’s of microvolts/meter range. Given the fact that modern electronics are switching volts to hundreds of volts at high speeds, compliance with governmental emission limits has challenged commercial equipment manufacturers for 25 years.
On January 1, 1996, compliance of commercial electronics with the EMC Directive (89/336/EEC) became mandatory for shipment into the European Union (EU). These requirements included not only emissions, but also immunity. Today’s EU emission requirements cover the frequency range from 100 Hz to 1 GHz for many products, while immunity requirements have been designed to simulate electrostatic discharge, proximity to intentional transmitters, AC power line fluctuations and lightning-induced transients.
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