Werner Schaefer

Werner Schaefer has 40 years of experience RF/uwave and EMC testing and was involved in the development, marketing, and support of EMC test equipment. He owns Schaefer Associates, a company that provides assessment, training, and consultancy services to the fields of EMC, RF/uwave, and Quality Assurance.

From This Author

EMC Testing

The Future Revision of ISO/IEC 17025 and its Impact on EMC and Radio Testing Laboratories

This article will summarize the major changes of the new revision of ISO/IEC 17025-2005, present the new outline of the standard and will discuss the new concept of a “risk-based” approach of implementing requirements.

Testing

Antenna Parameters and Antenna Calibration

Radiated emission measurements are required worldwide as one type of EMI measurement to demonstrate product compliance with regulatory requirements.

EMC Testing

Importance of Traceability in EMI Measurements

This article will introduce the concept of traceability, discuss the role an EMC test laboratory must assume to ensure traceability of test results and will introduce a future amendment to CISPR 16-1-1 which describes the requirements for calibration of EMI receivers and spectrum analyzers.

Testing

Narrowband and Broadband Discrimination with a Spectrum Analyzer or EMI Receiver

Spectrum analyzers and scanning receivers are widely used in EMI laboratories today. Their use for measuring both narrowband and broadband signals requires specific understanding of certain instrument and signal characteristics in order to correctly interpret the displayed results. This article explains methods for the discrimination between narrowband and broadband signals and provides guidance for the proper operation of test instrumentation.

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Military and Aerospace EMC: High Intensity Radiated Fields (HIRF)

FDA Issues Digital Health and AI Glossary

FCC Clarifies Satellite System Spectrum Sharing Rules

Practical Engineering: Using Welch-Satterthwaite Formula in Uncertainty Analysis

FCC Enforcement Bureau Convenes Regulators to Discuss Emerging Trends