Quick Tip 155 provides an overview of the CMRR-IEC, or common mode rejection ratio, measurement as recommended by IEC standard 602268-3. A demonstration of the measurement using APx500 audio test software is also performed. See also QT154.

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Video Description: In this Quick Tip video, Dave Mathew shares a brief overview about the CMRR IEC Measurement in Sequence Mode. We will learn in this video how Common Mode Rejection Ratio (CMRR) is measured following the IEC 60268-3 standard, using analog balanced outputs and relay switching.