White’s Electronics Spectra VX3 - Manual (Page 45)

Page 4-8
Spectra VX 3 User’s Guide
In this channel, the All-Metal Sensitivity setting is basically
an additional gain setting applied to the all-metal signal above
and beyond the
Rx Gain setting. The following graph shows a
signal with both a low setting (black trace) and a high setting
(gray trace). The higher sensitivity setting improves target sig-
nals, but it also increases the amount of audio noise and can
make VX
3 more “chattery.” This is especially true when EMI is
present.
All-metal audio can be presented in one of two ways: VCO,
and non-VCO. This selection is found at Audio

Search
Audio  All Metal  VCO :
Tip: In the normal all-metal mode, SAT (self-adjusting
threshold) is applied so if you hold the search coil steady
over a target, the audio response will fade away on its own.
In pinpoint mode, SAT is not applied so you can hold the
search coil steady over a target and the response will
remain steady.
High
Low