mask targets or decrease the detector's depth and sensitivity. The GROUND
BALANCE knob is on a 3 and ¾ turn potentiometer. While the knob will
turn endlessly in either direction, when the knob is at the end of its range, a
slight drag will be felt while turning.
The following procedure is for the Air Test only. For directions on
ground balancing your Euro Sabre in the field see the “Ground Balanc-
ing in the Field” section.
To set the GROUND BALANCE knob for the Air Test, turn the knob 5
turns counterclockwise and then turn the knob 2 turns clockwise. This will
make sure the GROUND BALANCE knob is just slightly above the middle
part of its range. No further turns will be needed for the Air Test.
Perform Air Test in ALL METAL Mode
Once you have set the correct threshold hum and adjusted the ground
balance, you are ready to perform an Air Test in the ALL METAL Mode.
Your Euro Sabre has a VCO-style ALL METAL Mode. You will find that
as targets get closer to the coil, the threshold tone will get louder and higher
in pitch.
Try waving your targets in front of the coil. Start from a distance of 10
to 12 inches away from the coil and slowly work your way closer to the
coil. Then try starting from 6 inches away from the left or right of your coil
and work your way to the center of the coil. Notice the changes of the
audio signal. Your strongest signal will always be closest to the center of
the coil. Additional information can also be learned by the signal strength
and pitch. A smaller or deeper target will give a less noticeable change in
the threshold than a larger or more shallow target will give. Take some time
and try all of your targets at different depths to find out how your detector
sounds.
