Chapter 5 DFX
™
Pro Options
as either negative/magnetic
(cold rock) or positive/con-
ductive (hot rock). Typically
“cold rock” will respond in
ever, once the trigger is
squeezed for pinpointing it
ceases to respond. A posi-
tive or conductive “hot rock”
If hot rocks are a problem
in the area being searched,
be found that will minimize
their target like responses
target responses in the +95
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 re-
sponse 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-re-
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
Whiteʼs models. At 20 the same characteristics can
be expected as EDIT REJECT +95 provided with
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 rockʼs miner-
alization and the surrounding ground, the current
ground balance setting, and the Sensitivity/Gain
Hot Rock Reject provides for 19 shades of gray be-
tween totally accepting all hot rocks (0), and totally
rejecting all hot rocks (20).
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