Page 3-6
Spectra VX
3
User’s Guide
Discrimination Sensitivity
Discrimination Sensitivity (sometimes called
AC sensitiv-
ity
) determines the responsiveness of the discrimination chan-
nel. This is a threshold level, so only target signals above the
threshold cause a discrimination response. Setting this too high
will cause noise and falsing in the discrimination audio. See
Chapter 4 for a more detailed discussion of audio responses.
Audio
Volume
sets the audio volume level for target responses (the
beeps).
Threshold
sets the volume level for the threshold tone,
which is the constant “hum” heard in the absence of a target.
Both target & threshold volumes are applied to all the audio
outputs: speaker, wired headphones, or wireless headphones. If,
for example, you set the volume while using the speaker, then
plug in a pair of headphones, you may need to readjust the vol-
ume for the headphones.
Discrimination
This is the method for setting up the discrimination pattern
for
VX
3
. The pop-up box lists all the VDI numbers from -95 to
An important note about sensitivity:
Many users assume
that “more sensitivity = better depth.” However, most metal
detectors are designed with more sensitivity range than
can possibly be used in many areas. This is to ensure that
maximum sensitivity can be achieved in the purest ground.
In many areas, less sensitivity is better; a quieter audio
allows you to hear deeper targets.
