AMTEK Version 7.4 2019-01 Page 19
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3. SYSTEM INSTALLATION
This chapter covers the various issues related to Acoustic Magnetic systems and
Electronic Article Surveillance systems in general, like:
Noise sources
Installation guidelines
3.1. Noise sources
Below there are various noise sources listed that might affect the performance of any
EAS system. It is strongly recommended to either eliminate these noise sources (as far
as possible) or maintain the largest possible distance to these noise sources.
The following devices can create or absorb AM noise signals which can reduce the
performance of an EAS system:
AM systems installed in other shops (even if they are installed up to 100m or
more away from your store).
Any electronic device that operates around 58kHz or produces harmonic
frequencies around 58kHz.
An active laptop. The back light in the screen can create a lot of noise which is
detected by the EAS system and can reduce the performance dramatically. Make
sure to keep laptop computers at least 3 meters away from the antennas.
(Moving) Objects containing metal, like sliding and revolving doors, elevators,
escalators, roller shutters, frames, etc.
Electronic devices, like computers, laptop screens, LCD screens, cash registers,
engines, transformers, etc.
Vertically positioned power cables, both low voltage and high voltage.
Lights (flashing, fluorescent, halogen, gas-de-charge, etc.)
Metal scan systems installed in close vicinity.
