TransCore encompass 4, Руководство пользователя

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Reader, Tag, and Antenna Alignment
The position of the Encompass 4 Reader, antenna, and placement of the tag on the vehicle must be
compatible. Also, consider any existing tagged vehicles now using the facility to determine the optimal
Encompass 4 Reader, antenna, and tag location and orientation at the site.
Note: If any of the vehicles using your facility already have tags, such as those used in toll
applications, contact TransCore for information about mixed-tag installations before you plan tag
type, location, and programming.
Three primary criteria must be satisfied to achieve the highest read reliability:
• Polarization of the tag and the Encompass 4 Reader must be aligned in the same direction
—
both
horizontal.
• The installed tag must be in a direct, unobstructed line of sight to the Encompass 4 Reader.
• Tags designed to be mounted in a vehicle windshield must be mounted in the vehicle’s windshield,
and tags designed to be mounted on the exterior surface of the vehicle must be mounted on the
exterior surface of the vehicle.
Caution
A tag may not be reliably read unless the preceding criteria are met.
Chapter 2 Developing the Site Plan
TransCore Proprietary
2–5