White’s Electronics Spectra V3 Field Guide - Manual (Page 8)

Three Frequencies - Best choice for general use. Transmits and receives
2.5 KHz-7.5 KHz and 22.5 KHz at the same time.
Salt Compensate - Receives and displays all frequencies. Uses subtraction
method for saltwater balance.
2.5 kHz - Single frequency. More sensitive to high conductive metals,
Silver/Copper.
7.5 kHz - Single frequency. Sensitive to all types of metals.
22.5 kHz - Single frequency. Most sensitive to small and/or low conductive metal,
Gold/Nickel.
Frequency Offset - Tunes out unwanted external signals by selecting one of 5
positive or 5 negative offsets. Aids in avoiding other metal detector signals and
other electrical interference. Offsets apply to single or combined frequencies.
LIVE CONTROLS - FREQUENCY
Frequency
Frequency Zoomed
Frequency
Zoomed Frequency Control -
• Allows advanced frequency methods
and display.
• Use “Help Balloons”, (trigger forward),
and advanced manual for more infor-
mation on Best Data/Correlate.
Using a single frequency can increase
the sensitivity to certain classes of met-
als by concentrating all available energy
to a single transmit frequency.
Tips ...
Moreover, 22.5 kHz is more sensitive to small and low-conductive targets like
gold. 2.5 kHz works best for high-conductive targets like silver coins. Preset
progams Prospecting and Deep Silver use the single frequency method. (Pros-
pecting 22.5 kHz and Deep Silver 2.5 kHz.) When changing frequencies a
re-adjustment of Sensitivity and ground balancing is necessary.
More in “Complete Owner’s Guide”
Pg 8