
(d) Having narrowed the null to a single location under the pointer
antenna mark that spot on the ground Now move away from that
spot in order to locate other spots on the ground As you locate the
path of other null spots you will be tracing the course of the line
Tracing by Peaks
To trace using signal peaks set the locating mode to “PEAK” according to the
instructions given in Chapter Hold the receiver approximately vertical
when using PEAK mode When PEAK mode is selected the user will notice
the horizontal flashing arrow inside the pointer icon in the upper right hand
corner of the display This indicates that the receiver will respond to fields in
the horizontal direction
(a) Walk around the general area of the energized line The goal is to seek
for increasing signal response as presented by the ANR and the arrow
shaped bar graph As you search it is recommended that you
occasionally rotate the pointer antenna since the response of the
antenna is now related to its positioning
(b) As the response increases continue walking until the response passes a
maximum and begins to decrease You have just passed a “peak” over
the buried line Position the
vertically so that the pointer is directly
over the spot where the peak is The pointer antenna should now be
pointing directly at the buried line
(c) Next rotate the
receiver to obtain
t h e m a x i m u m
response over the
line When this is
done the receiver
will be positioned
so that the line
passes directly
beneath it from
back to front as
shown