Fisher M-SCOPE 1225-X Operating Manual page 17

FALSE SIGNALS
between the beeps, or if you sweep at right
angles to your original direction, you'll receive
a single beep directly over the target (except
for the very shallow coin). One way to tell the
difference between a coin and a nail is to set
your discrimination at about 5. Most small nails will
be tuned out while most coins will respond with a
good, smooth signal.
6. EXTREMELY TRASHY SOIL: May result in a constant
chatter or "snap, crackle and pop" with assorted,
hard-to-find good signals.
SOLUTIONS: Increase the discrimination level. An
even better solution is to try the optional 5 inch
coil. You'll be able to zero in on good targets
much closer to junk.
7. DIGGING TOOL: If you're carrying a metal
digging tool in one hand, your 1225-X may sound
off each time you swing the coil beneath it.
SOLUTIONS: Hold it behind your back or up above
your waist.
False signals may also occur in the Zero Motion
Pinpointing mode. When in this mode the 1225-X
detects all metals so you may pinpoint a piece
of nearby junk instead of a good target. For this
reason, you should always recheck your target
area after recovering any target to insure that you
haven't missed anything.
You may also receive false pinpointing signals in
highly mineralized soil. In this case, it is important to
keep the coil parallel to the ground and at least
an inch above it.
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