Control Methods
P/N 7010-0341 www.topconpositioning.com
2-17
Figure 2-17. Sonic Tracker Working Window
When setting up the Tracker over a grade reference, the size
of the Sonic Cone or the “footprint” needs to be considered
(Figure 2-18 on page 2-18). As an example, at about 2 feet
from the tracker, you will have a footprint or cone of about
6 inches.
As the Tracker is positioned closer to the grade reference
the working footprint decreases in size. As the Tracker is
moving farther away from the grade reference the sonic
footprint or cone will increase in size.
S
onic
T
racker
II
2.4''
2.4''
BLINKING UP ARROW
BLINKING UP ARROW/ON GRADE
ON GRADE
BLINKING DOWN ARROW/ON GRAD
BLINKING DOWN ARROW
FINE
CORRECTION
(AUTOMATIC)
NO CORRECTION
MADE
(OUT OF
ORKING WINDOW)
SLOW BLINKING UP ARROW
SLOW BLINKING DOWN ARROW
SOLID UP ARROW
SOLID DOWN ARROW
COARSE
CORRECTION
(AUTOMATIC)