pg 53
Complete Guide to Spectra
V3
i
®
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 fi ltering optimizes penetration/ detec-
tion depth. Less fi ltering increases detection depth in low ground
mineral areas, however, doesn’t penetrate high ground miner-
alization well. Greater degrees of fi ltering increase detection
depth in high ground mineralization, however, doesn’t penetrate
low ground mineralization well Spectra V3 offers eight combi-
nations
of
digital
fi lters. Four different fi lter frequencies each with
a
signifi cantly different Band and a High Pass version.
Filter speed HZ – defi nes the speed of the fi lter process.
Lower numbers – 5 Hz and 7.5 Hz allow the fi lter 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 fi ltration.
High
Pass
–
A
faster
fi lter with a broader range of acceptance.
Most Programs use a 10 Band Pass Filter allowing normal ground rejection at normal sweep speeds. Selecting
a fi lter 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.
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