White Spectra VX3 Manual de instrucciones descargar pdf (Pagina 66)

Page 6-3

Spectra VX

User’s Guide

Ground Filter

Modern VLF metal detectors use electronic filters both to

remove unwanted noise — such as electromagnetic interference

(EMI) from radio signals and power lines — and to remove the

portion of the received signal due to ground mineralization (see

Chapter 1). Different filters offer trade-offs in performance.

Severe mineralization usually requires more filtering which can

affect depth. High EMI likewise requires more filtering. The

type and amount of filtration will usually affect loop sweep

speeds.

allows you to choose between two filter settings:

• 5Hz Bandpass — Lower mineralization, good EMI rejection,

allows slower sweep speed

• 12.5Hz Bandpass — Higher mineralization, good EMI rejec-

tion, requires higher sweep speed

Most programs use the 5Hz Bandpass filter as the default. This

is the best overall choice for low-to-moderate mineralization,

has good EMI rejection, and allows for a slower sweep speed

while still working well with faster sweep speeds. In extreme or

highly variable mineralization VX

can become chattery when

sweeping the loop; the 12.5Hz Bandpass filter may help.

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White Spectra VX3 Manual de instrucciones Pagina 66