Hot Rock Reject - Whites DXF Manual

™
Chapter 5 DFX
42
Pro Options
HOT ROCK REJ.
5
MIN MAX
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.
(Discrimination section)

19. Hot Rock Reject

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 indicate +95. In the past an opera-
tor would either accept +95 with the DISC EDIT
feature and hear hot rocks as a target response
"beep", or reject +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 accept +95 with the audio discrimina-
tion, Audio DISC must be on, and the HOT ROCK
REJECT feature adjusted for your preference-
regarding +95.
A HOT ROCK REJECT range of 0 to 20 is pro-
vided. At 0 the same characteristics can be expected
as EDIT ACCEPT +95 has provided with past
White's models. At 20 the same characteristics can
be expected as EDIT REJECT +95 provided with
past White's models.
At 10 a compromise between accepting +95 and
rejecting +95 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).