Paving Principles & Control Methods
Topcon Paver System Five Operator’s Manual
2-16
Tracker. Knowing the speed of sound, the Tracker accurately
calculates the exact distance to the grade reference
(Figure 2-16).
Figure 2-16. Timed Sound Pulses Determine Distance
Working Window and Sonic “Footprint”
Built into the Tracker is an operational zone, or Working
Window, 2.4 inches above and below the grade reference
(Figure 2-17 on page 2-17). The grade lights on the Sonic
Tracker and Control Box continuously display this grade
information to the operator.
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