White’s Electronics Spectra V3i User Manual

Page 53

Complete Guide to Spectra V3

SAT (Self Adjusting Threshold)

- Off – 40 40 = fastest - Adjusts the speed at which the thresh-

old is automatically maintained during searching. Used to stabilize All Metal modes. Higher

numbers are quick to correct threshold variations, however, require quicker search coil sweep

speeds to maintain metal detection in the All Metal mode. The ideal setting is one that maintains a

steady threshold considering your average search coil sweep speed and ground conditions yet

continues to detect metal targets at your slowest search coil sweep.

Analysis

- Selections active in the Analysis mode, TRIGGER on grip forward

position.

Match Search

– Use same settings selected for the Search mode.

Not Match Search

– Use settings different than the Search mode.

Ground Filter - Electronic filtering optimizes penetration/ detec-

tion depth. Less filtering increases detection depth in low ground

mineral areas, however, doesn’t penetrate high ground miner-

alization well. Greater degrees of filtering increase detection

depth in high ground mineralization, however, doesn’t penetrate

low ground mineralization well Spectra V3 offers eight combi-

nations of digital filters. Four different filter frequencies each with

a significantly different Band and a High Pass version.

Filter speed HZ – defines the speed of the filter process.

Lower numbers – 5 Hz and 7.5 Hz allow the filter to process more signals at slower search

coil sweep speeds.

Higher Numbers – 10.0 Hz and12.5 Hz, process signals at a faster rate allowing for faster

search coil sweep speeds.

Filter Types:

Band Pass- Typically superior for mild (low mineral) ground types and rejection of

external electrical noise/interference. Uses a narrow range of filtration.

High Pass – A faster filter with a broader range of acceptance.

Most Programs use a 10 Band Pass Filter allowing normal ground rejection at normal sweep speeds. Selecting
a filter other than 10 Hz Band Pass allows adaptation to personal search coil sweep speeds and localized ground
conditions.

5.0 Hz Band Pass – Better noise rejection, (Very low ground minerals), very slow sweep

speeds.

5.0 Hz High Pass - A little more sensitive in areas free of external electrical interference.

7.5 Hz Band Pass - Better noise rejection, (Low ground mineralization), slow sweep

speed.

7.5 Hz High Pass – A little more sensitive in areas free of external electrical interference.

10.0 Hz Band Pass – Better noise rejection, (Medium ground mineralization), medium

sweep speed.

10.0 Hz High Pass – A little more sensitive in areas free of external electrical interference.

12.5 Hz Band Pass - Better noise rejection, (High Ground Mineralization), fast sweep

speeds.

12.5 Hz High Pass – A little more sensitive in areas free of external electrical interference.