TransCore MPRX, System Manual

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MPRX
TransCore Proprietary 2–3
Tags
The MPRX has the capability to read TransCore AAR formatted read-only full frame tags and
TransCore SeGo protocol tags, for example, the AT5118 Harsh Environment Transportation
Tag and the AT5120 Transportation Tag.
How It Works
The MPRX directs the RF module to generate an RF signal, which is broadcast through
the external antenna mounted railside. Entering the MPRX’s reading range, a TransCore
RFID tag installed on a railcar or other asset to be tracked adds its programmed
identification information to the signal and reflects the signal back to the MPRX. The
MPRX receives this modified, or modulated signal, and decodes the tag data carried by
the reflected signal and transmits this data to the Train Recording Unit (TRU) or local host
computer for processing.
Overview of Site Planning
Developing a site plan provides the foundation for the site’s system design and
establishes the following system configuration parameters:
• Number and general location of primary components
• Number of different radio frequencies required
Gathering relevant site information is crucial before applying for Federal Communications
Commission (FCC) or regulatory agency approval from the country where the equipment
is to be used and ordering and installing MPRX(s) and tags.
Also, consider the following factors when developing a site plan:
• Type of tags used
• Antenna and tag alignment
• Site layout and rail traffic flow
• MPRX and/or antenna mounting requirements
• MPRX electrical requirements
• MPRX communications requirements
These factors provide relevant information regarding each site’s physical and
electromagnetic environment and the conditions under which the system must perform.
Reading of Mixed Population Tags
The MPRX reads AAR-formatted tags and TransCore’s SeGo protocol tags. The factors
that influence the readability include, but are not limited to, physical orientation and
configuration, type of read-only tag, ratio of backscatter cross-section of the tags, and
whether the tag is battery powered or beam powered.