Whites DXF Manuel d'utilisateur télécharger pdf (Page 52)

V.D.I. Normalization - Used in the 1 frequency

operating modes to correct the skewing of the tradi-

tional (6.59 kHz) V.D.I. number display calibration.

2 Frequency modes require Normalization and thus

it is automatically ON in both the 2 Frequency (Best

Data) and 2 Frequency (CORRELATE) operating

modes. It is not an option in 2 Frequency modes.

When operating in the 1 Frequency (3 kHz) mode

Normalization ON recalculates the V.D.I. display

information to represent traditional V.D.I. display

calibration at Whiteʼs traditional frequency 6.59

kHz.

When OFF in the 1 Frequency (3 kHz) mode the

V.D.I. scale is distorted/expanded in the higher end

of the scale (copper/silver) and compressed in the

lower end of the scale (foil/nickel). This distortion

can be used to provide higher display or discrimina-

tion resolution in this copper/silver coin area of the

scale. DISC EDIT will have to be conﬁ gured to take

advantage of this expanded resolution.

When operating in the 1 Frequency (15 kH

z) mode

Normalization ON recalculates the V.D.I. display

information to represent traditional V.D.I. display

calib

ration at Whiteʼs traditional frequency 6.59

kHz.

When

OFF in the 1 Frequency (15 kHz) mode the

V.D.I. scale is distorted/expanded in the lower end

of the scale (foil/nickel) and compressed in the

higher end of the scale (copper/silver). This distor-

tion can be used to provide higher display or dis-

crimination resolution in this foil/nickel area of the

scale. DISC EDIT will have to be conﬁ gured to take

advantage of this expanded resolution. The advan-

32. V.D.I. Normalization

33. 1 Frequency (3 kHz)

1 Frequency (3 kHz) - Operates at 3 kHz exclusive-

ly. Provides for superior high iron mineral rejection

and depth when salt is not present. Also provides

for better depth on higher conducting metals such as

copper and silver alloys.

1 Frequency (3 kHz) provides an alternate search

mode when iron (without the presence of salt) is

extreme and the primary target is higher conducting

metals such as copper or silver. Some of Whiteʼs

early 1970 models operated at 3 kHz and are still

revered for there performance in high iron black

sands.

1 Frequency (15 kHz) - Operates at l5 kHz exclu-

sively. Provides for superior performance in me-

dium to low mineralization (without the presence of

salt) and/or when lower conducting gold and nickel

range targets are the primary targets.

1 Frequency (15 kHz) provides an alternative

search mode when the ground minerals are not

severe (without the presence of salt) and/or when

34. 1 Frequency (15 kHz)

Chapter 5 DFX

™

Pro Options

(Multi Frequency Method section)

Normalization OFF chart for 3 kHz expands the high (copper/silver) end of the scale and com-

presses the low (foil/nickel) end of the scale. In the 15 kHz mode the opposite occurs.

The high end compresses and the low end expands.

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Whites DXF Manuel d'utilisateur Page 52

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