VCO
VCO is a function that allows the pitch of the All metal channel to smoothly change
depending on the signal strength. Human hearing perfectly distinguishes even slight changes in
sound frequencies – as a result, an experienced searcher is able to recognize the size and depth of
the object, and in many cases can recognize their mutual position. We strongly recommend
VCO
setting to "Yes"
from the very start of your experience with the detector.
Th SAT
The Th SAT function reduces the effects of external conditions on the operation of the All
metal channel of the detector. To put it simply: by using this setting we can prevent the detector
mistuning in the sun. Another important function of SAT is changing the response of the All metal
channel. For high SAT settings (especially SAT = 20) the user has the ability to audibly differentiate
between a large number of small objects laying at a shallow depth from one big object. A setting of
0 means that the Th SAT circuit is completely turned off
– detector is fully non-motion. With this
SAT setting, care must be taken to ensure proper and frequent Ground balance because the
detector will signal each change in soil mineralization, especially at the transition from e.g. forest to
field, as well as under the roots of large trees or near animal dens. Less skilled users can
overcome this by using higher SAT values. When set to 20, the SAT function is maximally fast.
NOTE: Turning the Th SAT circuit on can result in a decrease in the range of the detector’s All
metal channel. The amount of range loss will depend on the speed at which the search coil is
moved.
Audio Gain
The Audio Gain adjustment changes how detected objects are signalled. A small Audio Gain
will mean that weak signals from the Motion channel will have a quiet sound and strong signals,
a loud sound. This provides „depth” in the form of sound, which allows us to hear how far from the
search coil an object is located. If you set the Audio Gain to the maximum value then all signals will
produce a tone of maximum loudness. At an Audio Gain setting of 0, the sounds from the Motion
channel are completely blocked. This means that only sounds from the All metal channel are heard,
while looking at the ID value of an object on the display. For this setting the VCO function is
automatically turned on – as the power of the signal increases both the loudness of the sound and
its frequency increases too. In a such manner we can obtain a fully Non-motion mode.
NOTE: Remember not to set both the Audio Gain and Th Sens to 0 as this will turn off the
detector’s sound signals completely.
Volume
To adjust the volume of the sound received from objects. The level of the Threshold is not
dependent on this setting.
Iron volume
Iron volume is a function that allows you to listen to signals from objects rejected by
discrimination while the detector is in motion mode (Th Sens = 0, Audio gain above 0). In this way,
the user gets more information about the objects that are in the ground. Rejected objects are
signaled by 131 Hz, which is not dependent on the tones set in the sound profiles.
NOTE: Objects rejected by Notch are not signaled by the sound of iron, and the function of the Iron
volume works only in Motion mode.
RUTUS
Alter71
ver. 2.0
15
Summary of Contents for Alter71
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