User's Manual Part 1a

Introduction
G
ATEKEEPER SYSTEMS INC.
2007
CART CONTAINMENT MANUAL
Page 4
GS2 System Components (cont.)
The CentralTransmitter contains a microprocessor that generates and transmits
a digitally encoded locking signal that travels through a cable embedded in the
ground along the designated perimeter. The CentralTransmitter is capable of
generating a locking signal through outdoor perimeter antennas up to 5,000 feet
in length.
Form Factor
High-strength steel enclosure protected by key lock.
Dimensions
12.5” high x 10.5” wide x 4.25” deep
Microprocessor
Digital circuitry, flash programmable and compliant with
international regulations
Power Supply
110/220 alternating current transformer; ETL/CSA/CE
Certified
Signal Output
Below 9 KHz (VLF)
Output Current
1AMP peak-to-peak
Central Transmitter
Alarm
Audible and visible system status. Antenna status and
power supply status may be transmitted to any third
party alarm system via terminal block connections.
Double-insulated cable embedded that carries the signal from the transmitter
around the designated perimeter and back to the transmitter. Two types of wire
are used in a perimeter antenna installation, single conductor for the locking
signal and twisted pair (neutral) for a null signal. Wire is either embedded
(asphalt, concrete) or routed through EMT conduit, rigid conduit or PVC pipe.
Locking
Signal
14-gauge (AWG), single copper conductor, double-
insulated (PVC/Nylon) wire, (IMSA 51-5). Outer diameter is
0.25”. This is the wire typically used anyplace in outdoor
installation where cart locking is required.
22-gauge (AWG) is primarily used in conjunction with the
ExitManager for indoor installations.
Perimeter Antenna
Null Signal
(twisted pair)
14-gauge (AWG), two copper conductors, double-insulated
(PVC/Nylon) wire. Outer diameter is 0.25”.
This twisted pair wire is designed to cancel the effects of
the locking signal, thus creating a “non-locking, or “neutral”
signal. Twisted pair is most often used to route the neutral
signal from the CentralTransmitter inside the store to the
outside perimeter locking antenna.