User's Manual
Tags User Manual PRF-TAG’s
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tag’s message (which contains its ID) and adds to it the received signal strength and its
own (receiver's) ID. Thus enabling the PureRF system to determine the location of the tag
(and the asset to which it is attached).
Each PureRF receiver has a defined coverage area and the receivers of a system must be
deployed to cover the entire area in which tags are to be tracked.
Receivers store the messages of the received tags in a buffer, which they download
periodically to the user application.
1.3.1 Receiver Events
The user application can generate the following receiver events:
•
Receiver OK: The receiver is functioning normally.
• Receiver Timeout: A receiver that was transmitting is now not transmitting any signal at all. This
may occur, for instance, when the receiver has no power.
• Receiver Error: The receiver is connected and powered up but is indicating an erroneous state.
• Receiver in Upload: This event is generated and displayed while new firmware is being uploaded
to the receiver.
1.4 What is a PureRF Activator?
A PureRF activator is a device used for improving the accuracy of location measurement of
tags as provided by receivers only and is used mainly for entrances and exits.
An RFID activator contains an electronic PCB combined with an antenna and it
continuously transmits a unique identifier on a Low Frequency (LF) channel.
PureRF activators are deployed throughout the monitored space at key locations where the
improved location measurement accuracy of assets is required. Whenever a PureRF tag
enters in range of an activator (approximately within 2 meters/6 feet), the tag receives the
activator's signal and adds the activator ID to the transmitted message indicating that the
tag is located very close to that activator. Thus, a transmitted activator’s ID indicates the
location of a PureRF tag at a specific point in time because the tag must have been
physically close to this activator in order pick up its signal.
The activator signal is received by the LF receiver incorporated in the tag. Such channel
separation enables the tag to receive (activator ID) and transmit (to the receiver)
simultaneously.
The activator is an independent device that does not need to communicate with the third-
party application. The activator only needs power to operate.
1.5 What is a PureRF Initializer?
A PureRF Initializer is a device that integrates an LF transmitter and an RF receiver into the
same device. This enables the Initializer to perform bi-directional communication with tags.
The Initializer is used for controlling a tag's mode of operation (on/off) and for setting or
modifying a tag's operational parameters, such as: transmission frequency (timing),
activated sensors and so on.