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Page 4
The Minelab SD2200v2
The Deep position is recommended when looking for big targets at depth.
It smoothes out background sound and signals from small targets, making
small changes in audio signal easier to hear.
For normal detecting conditions use the N (normal) position, which does
not boost any signals.
Select whichever position best suits the conditions of the area you are
detecting. Each time the switch is changed, the threshold will also need to
be changed.
External amplifiers may be used in addition to the boost switch, provided
they have loudness limiters built in. This prevents loud signals becoming
unpleasant or dangerous to hearing.
5.2.7
Channel Switch (Ch1, Both, Ch2)
In almost all circumstances, this switch should be set to Both. There are
very few circumstances in which it is beneficial to use either of the other
settings and to do so will reduce sensitivity to certain types of targets.
The function of this switch is to select which of the channels the detector
uses to generate signals. Each of the channels has a sensitivity to its own
range of target types and sizes and each channel complements the other.
When set to Both, the detector uses the best channel for a particular target
to generate the signal. It is for this reason that Minelab recommends the
use of Both in almost all circumstances.
Selecting Ch1 can help reduce ground noise from very noisy ground. It
can sometimes stabilise the threshold which will assist in hearing faint
targets in such conditions. As a result of excessive ground noise, Minelab
does not recommend the use of Ch2 by itself.
Setting the Channel switch to Ch1 does not affect the blanking of sounds
due to ferrous targets while in Disc or Disc + ID. Note that in general,
however, the signal pitch and volume in Disc + ID mode for a target will be
altered.
Note that the Channel switch does not affect the way in which the automatic
ground balance operates.
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