Components and Operation
English, Revision 09, Date: 13.12.2016
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4
Components and Operation
4.1
Components in the Ground
4.1.1
Transponders
As reference markers, transponders with the trovan® coding are used; e. g. the
HG 71325XA transponder or the types HW DEV00095/HW DEV00098 (read write/RW).
Range and accuracy of positioning are influenced by:
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any large metal pieces (sheets) on the ground.
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proximity of any floor reinforcement
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inductive loops, as they are created e. g. by steel building mats, have a greater
influence. Individual metal poles have little effect. Those may partially be within
the metal-free area.
The following environmental conditions have no effect on the system:
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snow, ice, water.
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oil, tar, earth, dirt, etc.
4.1.2
Code structure
The antenna HG G-98820ZA is set up to receive only block number two with its 20 bits
of user data.
Line (for 3 bits each) and column parities are used for data protection. The transmis-
sion time for a complete code telegram is 8 ms.
