Whites-electronics Spectrum XLT User Manual download pdf (Page 43)

Chapter 5 XLT

Pro Options

22. V.D.I. Sensitivity

Controls how strong a target must respond to

produce a display indication, and controls a third

digit (fraction) of the V.D.I. number.

V.D.I. Sensitivity controls the intensity (strength)

of the target signal needed to activate the display

indications. A low V.D.I. Sensitivity setting would

require a strong target signal to trigger the display

indications. A higher V.D.I. Sensitivity setting

would require very little target signal to trigger the

display indications.

To provide greater specific target resolution, levels

of 86 and above will provide a third V.D.I. digit

(.0) to better evaluate targets. During EDIT only

the first two digits can be programmed ACCEPT or

REJECT.

As with all sensitivity levels, if set too high for the

area, the detector will become unstable and the

display indications unreliable.

Low ground mineralization is typically a good

indication that high V.D.I. sensitivity settings are

appropriate. Heavy mineralization or electrical

interference are conditions where a lower V.D.I.

Sensitivity setting is appropriate.

This feature is designed to allow adjustment of the

display stability. However, because the

instrument's display and audio tone are closely

associated in many of the audio modes, the V.D.I.

Sensitivity may increase or decrease overall audio

sensitivity.

V.D.I. SENSITIVITY

MIN MAX

(Display section)

Tips - Lower V.D.I. SENSI-

TIVITY level (smaller

numbers) offer fewer and

more reliable display

indications. However,

some deep targets may or

may not respond with a

display indication. Higher

V.D.I. SENSITIVITY levels

(higher numbers) produce

more display indications,

but less reliability. Levels

of 86 and above produce a

third V.D.I. digit (.0),

providing greater resolu-

tion.

+19.8

-95 +950

Third number (.8)

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 55 56

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Whites-electronics Spectrum XLT User Manual Page 43

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