high enough to knock out the iron target and still get a positive response on the nickel, pulltabs,
and quarter. When you are done with the IRON level, turn the DISCRIMINATE LEVEL to
around the 5¢ setting. This level is high enough to knock out the nickel. At this time, the iron
target and the nickel should give no response, while most of the pulltabs and the quarter will give
a solid response. Next, turn the DISCRIMINATE LEVEL knob just past the TAB marking. At
this time, most or all of the pulltabs should not give any audio signal. Only the quarter should
give a strong signal. Now, roll the DISCRIMINATE LEVEL all the way to MAX. Notice that
the quarter is still responding. The discrimination will not go high enough to lose most of the
silver coins.
This air test is designed to quickly show you how your discriminate mode works. Each machine
may be a little different from all of the others, so you may want to take some time and try
different targets to find responses of your machine. At a later date, you may want to build a test
garden to test your detector in the field.
Perform Air Test in PINPOINT Mode
When you are hunting in the DISCRIMINATE Mode, the PINPOINT button will allow you to
momentarily switch into the ALL METAL Mode. The PINPOINT button is springloaded and
must be pressed and held to shift into the ALL METAL Mode.
At this time, you are in the Silent Search Discriminate Mode. Press the PINPOINT button, and
you will immediately hear the threshold audio tone. This indicates that you are now in the ALL
METAL Mode. Your Cibola 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.
With the PINPOINT button pressed in, 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 shallower target will give. Take some time and try all of your argets at different depths
to find out how your detector sounds.
Take some time to try different DISCRIMINATE levels and then check them with the
PINPOINT Mode. You will notice some distinctly different tones. Practice and experience will
give you large amounts of information that will help you decide whether or not to dig a target in
the field.
Super Tune Your Cibola
The Cibola can be set up to get even better depth and sensitivity while operating in the
DISCRIMINATE Mode. Super tuning is accomplished by working in the DISCRIMINATE
Mode and turning the THRESHOLD knob to the highest setting.
