Overload - Garrett GTP 1350 Owner's Manual

If the target's Profile (size) consistently displays
smaller that actuality, then your Profiling sweep
width is too wide. Conversely, if the target
Profile displays larger than it actually is, then
your sweep width is too narrow. Maintain a 14"
sweep width to correct this error.
Some targets may fall on or near the boundary of two
sizes. In such cases, the PROFILING display may
change between sizes on successive sweeps (i.e. a
screw cap may read Small to Medium).
When Profiling a target, a distinctive "chirp" at the
beginning of each audible signal means that you're
achieving a valid target profile. The audio's duration
(short, medium or long) denotes the target's size (Small,
Medium, Large). The target size will also be shown on
the Profiling display.
Targets that are too deep, or too small, to be profiled are
indicated with a short "blip" and a blank Profiling Display.
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O v e r l o a d A u d i o
Very large and / or close targets may cause the GTP's
circuitry to overload, resulting in inaccurate Target ID and
Profiling information. If target overload occurs, as
indicated by a machine-gun sound, raise the searchcoil a
few inches until the overload audio ceases.
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