Fisher Labs Gold Bug DP, Owner'S Manual

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Notice the segment status along the arc, and the discrimination parameters they
represent, vary as you adjust the discrimination level with
+
or
-
.
For DISC values
(
at bottom right-hand corner of screen) up to 40:
- Operation is tone discrimination only
• No targets are eliminated from detection
- Target IDs less than the DISC value induce a LOW tone
• Represented by shaded segments
At DISC value = 41:
- Target elimination begins
•Targets in the blank segment region are not detected.
- Target IDs less than the DISC value induce a LOW tone
• Represented by shaded segments
At DISC values over 41:
- The LOW tone range of targets progressively shrinks
• Represented by shaded segments
- Target IDs less than the DISC value induce a LOW tone
• Represented by shaded segments
At DISC value = 80:
- All detected targets induce V.C.O. tones.
• Represented by solid segments
- There are no LOW tones
- No targets under 80 are detected.
Here is an example of one possible setting:
This discrimination interface for the Gold Bug DP was designed especially for relic-hunting.
Relic hunters want control over what sizes of iron are detected, and also control over
which targets are detected with a low-tone. Target values of 40 or less are ferrous.
This value
and higher
will induce
V.C.O. tones
Values less
than 20 will
NOT BE
DETECTED
Values from 20 to 49
will induce a LOW tone
Values from 50 to 100
will induce V.C.O. tones
(see p.25)
Suggestion: Try changing the
settings, watch the screen, and pass
objects over the searchcoil at each
setting. It will quickly become obvious
how these controls work.
OPERATING IN DISCRIMINATION M ODE
In Discrimination mode, pressing
+
or
–
will change two detection parameters:
1. Tone Identification
2. Target Elimination
As the level of discrimination changes, the target segments along the arc on the
screen will be displayed in one of three states:
1. Blank (no segments displayed)
2. Grey (segments displayed in a shaded color)
3. Black (segments are solid black)
The segments along the arc will remain illuminated in this state as you are
pressing
+
or
–
.
This displays your chosen target discrimination parameters.
At any time during operation, you can view the discrimination settings in one of
two ways:
1. On the bottom-right of the screen the DISC value is always illuminated.
a. This value is the division between the LOW tones and V.C.O. tones.
b. This value is the lowest target value which will be detected with a
V.C.O. tone
2. Whenever you press
+
or
–
, the arc will illuminate and show your
current detection parameters.
The first press of
+
or
–
will change the discriminate level by one value.
When a target is detected, the target icons representing the target category are
illuminated.
Discrimination Control continued on next page
OPERATING IN DISCRIMINATION M ODE