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The Technician's EMI Handbook by Joseph Carr

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Chapter 11

Locating EMI Sources

The first job in solving an EMI problem is to locate the source. Noise can be emitted from any of a wide variety of sources. Some are obvious (such as a radio transmitter), while others are not so obvious (such as dimmer switches in the lighting system). In this chapter we will look at some approaches to finding the sources, including both simple sleuthing tools and more formal radio direction finding (RDF) methods.

RF SLEUTHING TOOLS

The correct tool for finding RF sources is anything that will permit you to unambiguously determine where the radiation is coming from. We will take a look at several low-cost possibilities.

If you are looking for a source that is out in the neighborhood somewhere, such as a loose ...

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