Installation Manual

NT132 System Overview
History
Radio Frequency Identification (RFID) systems have existed for
many years. Initially, systems were developed so that military aircraft
and ships could be quickly identified by electronic methods. Radio
equipment (transponder) on a plane or vessel would broadcast a
coded signal to identify it as a friend to an appropriate receiving
station. A plane or vessel not able to transmit the correct
identification would be considered a possible enemy. Similar
technology is employed today for air traffic control as well as vessel
identification in shipping lanes and ports – and the RF device is still
called a transponder.
Other present-day applications include “tagging” vehicles, assets or
people for identification within a designated area – or as they pass
through portals. For example, a transmitting device can be placed on
a laptop computer so it can be identified if carried out of a building.
Further, if people in that building also carry transmitting devices, it is
easy to ascertain not only that the computer left the building – but
that it was not carried by the person to whom it was assigned!
Obviously, such technology has quickly found its way into disciplines
such as vehicle entry, fleet management, inventory control, and
controlled access to buildings or other areas.
NT132 System Components
The following diagram (Figure 3) shows a very basic AXCESS NT132
system. The system has the following components:
• A Reader to send radio signals to a transmitting antenna,
receives radio signals from a receiving antenna and outputs the
data to some device – a computer or a Wiegand control panel,
for instance.
• A transmitting antenna to “wake up” any Tags in the area.
• An Antenna Tuning Unit (ATU) placed between the Reader and
the Antennas to properly tune the transmitting antenna to its
surrounding environment.
• Tags to receive wake-up radio signals and broadcast their IDs to
the receiving antenna. Tags can be carried by individuals, placed
on equipment or in vehicles.
• A receiving antenna to intercept radio signals from the Tags and
to pass the signals to the Reader.
• One or more of the following: a computer for data storage, a
peripheral device such as a light, buzzer, door strike, gate