50
Chapter 5 DFX
™
Pro Options
2
PREAMP GAIN
MIN
MAX
(Preamp Gain section)
29. Preamp Gain
Selects the intensity of the signal received from the
loop.
PREAMP GAIN (called Signal Balance on some
models) is used to promote stability and perfor-
mance. Like a sensitivity control, too much
PREAMP GAIN will result in unstable operation
and unreliable indications. Unlike a sensitivity
control, PREAMP GAIN will have a substantial
effect on OVERLOAD.
For maximum detection depth, fine tune the
PREAMP GAIN to the highest number setting
without causing OVERLOAD, and/or unstable
operation. More adjustment levels (range) are
available than what may be usable. You may never
encounter an area where maximum PREAMP
GAIN can be used. Electrical interference may
make it difficult to receive an Air Balance at high
PREAMP GAIN settings.
Selections such as MIXED MODE or AUDIO
DISC OFF may not allow as high a PREAMP
GAIN level as other selections. This is normal as
some of these modes naturally see more targets and
ground, and they may still provide superior perfor-
mance and depth even with the lower PREAMP
GAIN selection.
Every time the PREAMP GAIN level is changed,
the detector should be re-ground balanced. Once in
an operating mode, simply press ENTER to re-
ground balance.
Tips - Higher levels
increase detection depth.
However, the detector
must be stable to be able
to recognize a target.
OVERLOAD should not
appear on the display
when only ground miner-
als are present. Settings
from 1 - 4 are available.