42
Chapter 5 DFX
™
Pro Options
19. Hot Rock Reject
5
HOT ROCK REJ.
MIN
MAX
(Discrimination section)
Tips - Hot Rocks are often
described or categorized as
either negative/magnetic
(cold rock) or positive/
conductive (hot rock).
Typically a negative or
magnetic “cold rock” will
respond in the search
mode, however, once the
trigger is squeezed for
pinpointing it ceases to
respond. A positive or
conductive “hot rock” will
continue to respond during
pinpointing.
If hot rocks are a problem
in the area being searched,
in most cases a HOT
ROCK REJECT setting can
be found that will minimize
their target like responses
compared to real metal
target responses in the +95
category. Settings from
1 - 20 are available.
Hot rocks (rocks higher or different in mineraliza-
tion than the surrounding ground) respond as +95
on the V.D.I. scale. Unfortunately in some ground
conditions very deep, small, or unusual real metal
targets may also in95. In the past an opera-
tor would either 95 with the DISC EDIT
feature and hear hot rocks as a target response
“beep”, or 95 and not hear a target like
response from + 95 target types.
The HOT ROCK REJECT features allows a com-
promise between total rejection or total acceptance
of the + 95 V.D.I. indication. Disc Edit Accept or
Reject of +95 will only control the visual displaying
of +95 with the Visual Discrimination feature ON.
To reject or 95 with the audio discrimina-
tion, Audio DISC must be on, and the HOT ROCK
REJECT feature adjusted for your preference-
reg95.
A HOT ROCK REJECT range of 0 to 20 is pro-
vided. At 0 the same characteristics can be expected
as EDIT 95 has provided with past
White’s models. At 20 the same characteristics can
be expected as EDIT 95 provided with
past White’s models.
At 10 a compromise between acc95 and
rej95 is achieved. A hot rock may or may
not produce a target like response depending upon
many factors such as the actual size of the hot rock,
degree of difference between the hot rock’s mineral-
ization and the surrounding ground, the current
ground balance setting, and the Sensitivity/Gain
settings.
Hot Rock Reject provides for 19 shades of gray
between totally accepting all hot rocks (0), and
totally rejecting all hot rocks (20).