Introduction
Englisch, Revision 14, Date: 07.02.2017
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The measured voltage X must fall below a certain threshold (refer to Table 20 on
page 31).
If the above listed preconditions are met, a positioning pulse with changeable duration
is generated. For the generation of a new positioning pulse it is essential that the re-
ception voltage S has fallen below the threshold set for
Threshold for Decoding
(refer to section 5.2.2.2 on page 33) first.
Thus only one pulse per transponder crossing is possible. Therefore, if a vehicle/crane
stops above the transponder after the positioning pulse was generated and then
changes its direction of travel, no renewed positioning pulse is generated during the
center crossing!
Positioning Accuracy
As the field compensation for the corresponding measuring coil is not infinitely sharp
and is also depending on the reading height (refer to Appendix, Section A on page
48), the positioning pulse is generated at different but reproducible locations, depend-
ing on the direction of travel. Since the antenna is not aware of its direction of travel,
but depends on the physical effect of the field strength, only the vehicle/crane control
can carry out the direction-depending compensation. The appendix, section B on
page 51 shows the locations of the positioning pulse related to the X and Y coordinates
and the reading height.