Take some time and try all of your targets at different depths to find out how your detector
sounds.
Adjust Ground Balance for Air Test
The ground balance function for your Tejón is a form of discrimination that allows you to tune
out the mineralization in the ground that may mask targets or decrease the detector’s depth and
sensitivity. The GROUND ADJUST knob is on a 3 and ¾-turn potentiometer. While the knob
will turn endlessly in either direction, when the potentiometer is at the end of its range, a slight
drag may be felt.
Note: The following procedure is for the air test only. For directions on ground balancing your
Tejón in the field, see the “Ground Balancing in the Field” section on page 16. For the best
performance of your Tejón in the field, the machine must be ground balanced to the location in
which you will be working.
To set the GROUND ADJUST knob for the air test, turn the knob four turns clockwise and then
turn the knob one half turn counterclockwise. No further turns will be needed for the air test.
Perform Air Test in All Metal Mode
Once you have set the correct threshold tone and adjusted the ground balance, you are ready to
perform the air test in the all metal mode. Your Tejón is currently in the VCO-style of 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 from the left
or right of the coil and work your way into 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 target
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 tone than a larger or shallower target will give.
Take some time and try all of your targets at different depths to find out how your detector
sounds.
Adjust TONE Control for All Metal Mode
The Tejón has the ability to adjust the pitch of the all metal and discriminate audio signals to suit
your audio tone preferences. Turn the TONE knob clockwise just past the click. Your Tejón will
no longer operate in the VCO mode. The all metal will now only respond with a single tone for
threshold tone and any target. Wave a target in front of the coil and notice the pitch of the audio
tone. Continue waving the target as you slowly turn the TONE knob. You will find that the
farther the TONE knob is turned clockwise, the higher in pitch the audio tone becomes. Take
some time to try different tone settings.
Adjust TONE Control for Disc Mode
