Technical Manual

Technical Manual
ARGUS AM Floor System
General AM and EAS issues v1.2 Page 6 of 65
3 General AM and EAS issues
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
Listed below are various noise sources that might affect the performance of any EAS
system. It is strongly advised 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 as far as 100 m or
more away from your store).
• An active laptop. The backlight in the screen can generate 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.
• Other electronic devices like LCD and LED screens, cash registers, electric
motors, transformers, etc.
• Power cables, both low voltage and high voltage.
• Lights (flashing, fluorescent, halogen, gas-discharge, High Intensity Discharge,
etc.)
• Metal scan systems installed in close vicinity. Cross Point’s Metal Scan operates
around 19 kHz in channel 0 and has a second harmonic frequency around 58 kHz.
• Any other electronic device that operates around 58 kHz or produces harmonic
frequencies around 58 kHz.