Original Date: 04/26/1999
Revision Date: 01/18/2007
Information : Marshall Electromagnetic Compatibility Design and Interference Control Handbook
Previously at Marshall Space Flight Center (MSFC), electromagnetic interference (EMI) issues were sometimes not addressed during the design phase. Only after a unit experienced failures during testing were the EMI engineering staff called into the situation. This approach led to expensive redesign costs and/or waivers being issued before the unit could be fielded. In 1995, MSFC developed the Marshall Electromagnetic Compatibility (EMC) Design and Interference Control (MEDIC) handbook to help electrical engineers use practical information in designing for the mitigation of EMI.
The MEDIC handbook was tailored to the needs of the NASA community and provided: Guidelines to translate EMI requirements into electrical design requirements.
Design techniques to minimize the potential for EMI.
Practical measurements and prediction techniques to identify potential EMI problems during the early design phase.
Practical retrofit fixes for EMI problems discovered after the design phase was completed.
The handbook was developed independently from qualification or acceptance testing. In addition, the EMI engineering staff used a separate laboratory to prove-out techniques, and used common electrical test equipment to measure results. This approach enabled electrical engineers to prove-out the design before performing expensive EMI testing.
Since 1995, the EMI engineering staff has distributed at least 1,000 copies of the MEDIC handbook. Electrical engineers from organizations external to MSFC now commonly contact the staff to discuss EMI design issues as well as test problems. The MEDIC handbook has been a useful tool in the EMI design area, and demonstrates practical approaches to addressing EMI in the spaceflight industry.
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