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RFID For Dummies® by Patrick J. Sweeney II

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Chapter 7

Seeing the Invisible: The Site Assessment

In This Chapter

bullet Figuring out where to look for the invisible

bullet Setting up test equipment

bullet Measuring stray electromagnetic waves

bullet Locating the best spots for your RFID equipment

W hen you think about installing an RFID system in your warehouse or distribution center (DC), you may think that the only obstacles you have to worry about are a fast-moving forklift or an angry dock worker. But the real villain is invisible, and it’s called ambient electromagnetic noise (AEN). This rogue AEN consists of electrical and magnetic waves that certain electrical devices generate and propagate through the air. In a typical warehouse or store backroom — with conveyors, electric doors, sorting machines, infrared scanners, real-time location systems, alarm motion detectors, site radio communication, and a plethora of other systems generating electrical noise — it’s easy to imagine how these electromagnetic waves fill the space around you.

Because these systems (which you already have in place) can create AEN with radio-frequency signals in the range ...

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