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Crew Quarters (CQ) and Electromagnetic Interference (EMI) Measurement Facility Combined Impedance StudyThis report documents an investigation into observed failures associated with conducted susceptibility testing of Crew Quarters (CQ) hardware in the Johnson Space Center (JSC) Electromagnetic Interference (EMI) Measurement Facility, and the work accomplished to identify the source of the observed behavior. Investigation led to the conclusion that the hardware power input impedance was interacting with the facility power impedance leading to instability at the observed frequencies of susceptibility. Testing performed in other facilities did not show this same behavior, pointing back to the EMI Measurement Facility power as the potential root cause. A LISN emulating the Station power bus impedance was inserted into the power circuit, and the susceptibility was eliminated from the measurements.
Document ID
20110011412
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Scully, Robert C. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2011
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
JSC-CN-23221
Meeting Information
Meeting: 2011 IEEE International Symposium on Electromagnetic Compatibility
Location: Long Beach, CA
Country: United States
Start Date: August 14, 2011
End Date: August 19, 2011
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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