TransCore MPRX, Системное руководство

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System Guide
TransCore Proprietary 2–8
Caution
TransCore advises locating antennas controlled by an MPRX at least 24 feet (7.3
meters) away from antennas that are controlled by another MPRX. There is no
minimum spacing for antennas connected to the same MPRX.
Table 2 – 1 Examples of Staggered Reader Frequencies for AAR-formatted Tag Operation
Table 2 – 2 shows examples of staggered reader frequencies in a site outside the U.S. with
up to four readers.
Table 2 – 2 Examples of Staggered Reader Frequencies for Tag Operation Outside the U.S.
Reflection, Refraction, and Diffraction of RF Signals
RF signals can be reflected, refracted, or diffracted by metal objects, walls, and even wet
pavement or ice. Any of these factors can alter or degrade system performance. When
designing your site plan, you must consider permanent structures and transient factors in
the vicinity that may affect RF signals being generated by the MPRX. Permanent structures
include buildings, chain link fences, guard shacks, and gates. Transient factors include
passing traffic and local weather conditions, such as rain or snow. Symptoms of reflection,
Rail Number Reader Frequency
1 911.50
2 918.50
3 913.00
4 915.00
5 921.50
6 917.00
7 910.00
Rail Number
Reader
Frequency*
1 865.25
2
866.25
3
865.50
4 866.50
5
865.75
6
866.75
7 866.00