Zoom - Sensors & Software LMX100 User Manual

The higher the number, the shorter the filter width, and the more "aggressive" the filter. This
results in the removal of long and short flat-lying features.
Pressing OFF turns the filter off completely.
6.2.3

Zoom

This button controls the horizontal and vertical scaling of the displayed GPR data. Pressing the
Zoom button changes the buttons on the bottom menu, which are explained below:
•
Depth – Pressing + and - under the Depth button allows you to change the display
depth of the data. This is commonly referred to as the depth window. The pre-set
values range from 1m to 8m (4' to 30'), see Figure 6-11.
If the data was collected with a shallower depth, the depth setting can still be increased
after the fact, when reviewing the data. In general, it's a good idea to set your displayed
depth to 1.5 - 2 times the depth you expect the deepest target to be.
•
Position – Pressing + and - under the Position button allows you to change the length
of data displayed on a single screen. This is also known as horizontal scaling. The pre-
set values range from 10m to 30m (25' to 100'), see Figure 6-12.
One reason for setting this to 30m would be to fit more data on the screen and look for
consistency among hyperbolas that were crossed.
Figure 6-10: Showing variable filter lengths, including Filter Off
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Data Collection