gold jewelry overlap. Also, the depth of the target and its orientation in the
ground can change the received signal. A coin that is flat to the coil will
produce a better signal than a coin that is on edge. Take some time to try
different combinations of depths and orientation of your targets and find
out how your detector responds.
We are now ready to discriminate targets from each other. We will start
with the DISCRIMINATE LEVEL at MIN. Please notice that the DIS-
CRIMINATE LEVEL knob has words that correspond to the items that are
discriminated out.
All four targets (the iron, washer, pull tab and coin) will respond with
a good audio signal at the MIN setting. Next, we will turn the DISCRIMI-
NATE LEVEL up to the Iron setting. This should be high enough to knock
out the iron target and still get a positive response on the washer, pull tab,
and coin. When you are done with the Iron setting, turn the DISCRIMI-
NATE LEVEL to the pull tab setting. At this time, the iron target and the
pull tab should give no response. While the coin will give a solid response,
the washer may or may not give a target signal. Now, roll the DISCRIMI-
NATE LEVEL all the way to MAX. Notice that the quarter is still respond-
ing. The discrimination will not go high enough to lose most of the silver
coins.
This Air Test was 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 re-
sponses of your machine. At a later date, you may want to build a test gar-
