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Eliminate Noise From Readings, A Simple Method For Noise Not Related to AC

Question asked by tomc on Sep 18, 2012
You can eliminate noise from digital multimeter readings even when the noise is not associated with the AC power. In several other videos we showed how to integrate over 1 or more power line cycles to eliminate noise. Unfortunately, noise can come from many sources and may not be related in frequency to the AC power. Examples include switching PS, communication circuits and EMI coupling from rotating machines. In this video we look at a DC voltage signal that has 400 Hz noise on top of it. A 400 Hz AC source is used in aircraft as it is more efficient. The method shown in this brief multimeter tutorial can be used to eliminate other sources of noise as well.
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