Instruction Manual
Page 13
The Excalibur’s Controls
This section gives detailed descriptions of the Excalibur’s controls and their
functionality. It is important that you read through this section carefully as it
will provide you with all the information required to set and adjust these
controls. As you gain experience with your detector it may be beneficial to
refer back to this section.
Figure 5 – The Excalibur Control Panel
Threshold Control and On / Off Switch
The Threshold control allows you to adjust the level of
background threshold in addition to switching the Excalibur
“On” or “Off”. When in the fully anti-clockwise position,
the Excalibur is “Off”. Turn the control clockwise and the
Excalibur will “click” “On”. The background Threshold or
“Hum” aids in the location of targets.
Small or large, deep targets may not produce a distinct target signal but rather
cause only a slight change in the Threshold tone.
Ideally, this control should be set to a position where the Threshold tone is
“just” audible. At this level, the presence of these small or deep targets will be
more easily recognized.
Turning the Threshold control in a clockwise direction, the Threshold level will
increase. At the most clockwise setting, the Threshold is at its “maximum”.
Once again, it is advisable to set this threshold to a level that is “just” audible.
A Threshold level that is too high will “mask” out the small or deep targets,
while a “silent” or non-audible Threshold level will not allow the small change
in Threshold tone created by small or deep targets to be heard.
