GETTING STARTED 16
Adjust SENSITIVITY
The all metal circuit uses a single channel to detect various metals.
The discriminate circuit uses two different channels, then amplifies and
filters them. The detector will then compare the signals and determine
whether or not to beep at the target. While there is a great advantage to
ignoring unwanted targets, it can make the circuitry more susceptible to
interference. A number of outside conditions such as power lines, highly
mineralized soil, and wet salt sand can cause interference.
The SENSITIVITY knob is used to raise or lower the power to the
operational amplifiers, which changes the gain. Gain is a measurement of
how much a signal is amplified. The higher the gain the more depth and
sensitivity to small objects a detector has. Unfortunately, any small inter-
ference that is amplified can cause the detector to become erratic. The
SENSITIVITY control is used to find the best gain setting in any location
without letting the detector become unstable.
The SENSITIVITY knob is numbered from MIN to 10 and then has
an orange area called the Max Boost Zone. For normal hunting, anywhere
in the numbered zone will work very well. However, the Max Boost will
allow you to increase the power to the operational amplifiers to the point
of overload. This may cause your detector to become unstable and force
you to turn the SENSITIVITY knob to a lower setting. An overload situ-
ation will not hurt your detector, but it will maximize the gain that is used
by your detector. This can, in certain conditions such as low mineraliza-
tion in the soil, cause your detector to penetrate deeper into the ground
