White’s Electronics Spectra V3 - Manual (Page 37)

Complete Owner’s Guide - Spectra 37
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up directly over the target (for discrimination) or sweep normally (discrimination) then
slowly over specific targets (all metal).
• Tone ID – Adds the Tone ID feature specifically to the discriminate portion of the
Mixed Mode. Some experts rely heavily on Tone ID to pick out good targets in
heavy trash. However, it does take a greater degree of concentration, and tolerance
for audio pitch variations.
• Modulation – Specifically for the Discrimination portion of Mixed Mode. Provides
deeper targets with weaker or less intense audio ‘beep’. Important for Mixed mode
when combined with tone ID.
• Range – Adjust modulation specifically for the Discrimination portion of the Mixed Mode.
Selects the modulation range (see above). Modulation range is, to some, more critical for
the Mixed Mode. Again, the range is selectable for three reasons -
1) Ground mineral conditions vary how modulation performs.
2) Some experts prefer a modulation setting for a gradual declining
scale as targets are found deeper. Others prefer that only the deepest
targets produce a declining “beep”.
3) Ground mineral anomalies (small hot rocks) can cause a weak signal
response. By adjusting modulation range, quite operation can often be
achieved in difficult ground conditions.
• VCO – VCO – Adds the VCO (Voltage Controlled Oscillator) specifically to the All Metal portion
of the Mixed Mode. VCO provides a higher pitch ‘beep” as the signal strength intensifies.
Target center, multiple targets near each other, and deep targets are easier to recognize.
• Pinpoint Audio – Selects options specifically for the pinpoint mode, toggle on grip squeezed
and held.
• VCO – Turns ON/OFF the VCO (Voltage Controlled Oscillator) for the Pinpoint mode (toggle
on grip squeezed and held). When ON, VCO provides a higher pitch ‘beep” as the signal
strength intensifies.
• Ratchet – Turns ON/OFF the Ratchet pinpoint feature specifically for the pinpoint mode (toggle
squeezed and held). Automatically detunes (ratchets down in size) large signals to a minimum
for faster pinpointing.
Frequency Detailed
•
Three Frequencies (Primary) – Selects three primary operating frequencies and the two associated and
significantly different multi frequency dataprocessing methods, Best Data & Correlate.
• VDI Best Data – Selects the strongest signal among the three primary frequencies and
disregards the data from the other two frequencies. Three primary frequencies data is
still used for ground rejection, however, audio and significant display data is derived
using only the signal from the strongest frequency.
• VDI Correlate – Measures the targets differences between different primary frequencies
and calculates if those differences likely indicate a valued target signal or trash metal.
• Span Limit – Adjust how different targets can be at the different frequencies and
still be considered a likely valued target signal or trash metal.