Checkpoint Systems Inc. TPRO7200 Manual De Usuario
INSTALLATION PROCEDURE,
TPRO7100 AND TPRO7200
____________________________________________________________________________________________________________________________
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Dwg. No. 813910
Rev. *60
Page 4
2.0
EFFECTS OF NOISE IN THE INSTALLATION ENVIRONMENT
The following discussion on noise sources and the effects of noise on the system are provided
primarily to make the installer of the system aware of potential pitfalls when installing the
TPRO7100 or TPRO7200 equipment. However, the TPRO7100/7200 antenna is designed in
such a way that the reader can be placed on a metal counter without degradation of performance.
For the same reason, passive noise sources in general should not be detrimental to the
performance unless placed directly on top of the reader antenna section.
primarily to make the installer of the system aware of potential pitfalls when installing the
TPRO7100 or TPRO7200 equipment. However, the TPRO7100/7200 antenna is designed in
such a way that the reader can be placed on a metal counter without degradation of performance.
For the same reason, passive noise sources in general should not be detrimental to the
performance unless placed directly on top of the reader antenna section.
2.1
EFFECTS OF NOISE ON THE TPRO7100 AND TPRO7200 SYSTEM
The TPRO7100/7200 "listens" for very small field disturbances caused by the presence of
a tag. Since these signals are very small, it is possible to drown these signals in noise
produced by different types of equipment or noise produced by metallic objects in the
immediate vicinity of the system’s antenna.
Once it is understood what the typical problems are, the Customer Service Engineer (CSE)
will find that avoiding these problems simplifies the installation process.
a tag. Since these signals are very small, it is possible to drown these signals in noise
produced by different types of equipment or noise produced by metallic objects in the
immediate vicinity of the system’s antenna.
Once it is understood what the typical problems are, the Customer Service Engineer (CSE)
will find that avoiding these problems simplifies the installation process.
2.2
TYPES OF NOISE SOURCES
In the typical field environment, different noise sources will be encountered. Devices
such as electric motors, transformers, electric lines, etc., radiate alternating magnetic
fields. These devices will generally be referred to as "active sources".
such as electric motors, transformers, electric lines, etc., radiate alternating magnetic
fields. These devices will generally be referred to as "active sources".
If metallic objects are within (to the sides and above) 1 foot of the system’s antenna, they
will be "excited" by the system’s transmitted field. This will create noise in the system’s
antenna if the metallic object(s) is being mechanically or acoustically vibrated. As
opposed to the previously described active noise sources, these objects only re-radiate the
system’s signal and are therefore called "passive noise sources". This reflected noise
impairs the system’s sensitivity and may cause the system to miss a tag detection
opportunity.
will be "excited" by the system’s transmitted field. This will create noise in the system’s
antenna if the metallic object(s) is being mechanically or acoustically vibrated. As
opposed to the previously described active noise sources, these objects only re-radiate the
system’s signal and are therefore called "passive noise sources". This reflected noise
impairs the system’s sensitivity and may cause the system to miss a tag detection
opportunity.
Provided the mechanism that causes the disturbances are understood and that one is
familiar with the type of equipment / objects that cause these problems, it is quite simple
to avoid these pitfalls.
familiar with the type of equipment / objects that cause these problems, it is quite simple
to avoid these pitfalls.
2.3
TYPICAL ACTIVE NOISE SOURCES
Provided that the distances between the system and the possible noise source(s) indicated
above are maintained, no special problems should be encountered.
above are maintained, no special problems should be encountered.
The types of equipment typically responsible for system disturbances in a field
environment are:
environment are:
•
Transformers or high current AC cables within 6 feet (2 meters) from the antenna.
•
Escalators within approximately 6 feet (2 meters) from the antenna.
•
Electronic equipment in general, within approximately 6 feet (2 meters) from the
antenna.
•
Cash registers within approximately 3 feet (1 meter) from the antenna.
•
Neon signs or fluorescent tubes within approximately 3 feet (1 meter) from the
antenna.