Detect Plus; Threshold Level; Threshold Pitch - Minelab GPZ7000 Instruction Manual

Detect Plus

Detect Plus
The Detect Plus page contains the following functions:

• Threshold Level

• Threshold Pitch

• Volume Limit
• Audio Smoothing
• Ground Balance Mode
The Detect Plus Page
Threshold Level
The constant background 'hum'
produced by the detector is called the
Threshold. Variations in the Threshold
help you to hear very small and deep
targets. The Threshold Level has a range of 1-50, with a
preset of 27.
The Threshold is controlled by Threshold Level and
Threshold Pitch. The correct adjustment of both Threshold
settings will depend on your hearing and environmental
sounds such as wind.
Adjust the Threshold Level
Select the Threshold function on the Detect Plus page. An
adjustment bar with a range from 1 to 50 will appear. Use
the left and right Arrow buttons to increase or decrease
the Threshold Level to a faint, audible hum.
Press Select when done.
Setting the Threshold to an audible hum will highlight
variations in signal response which may indicate the
presence of a target. If the soil conditions change the
Threshold Level may need adjustment.
If the Threshold Level is too high, faint targets will be
harder to hear above the Threshold 'hum' .
If the Threshold Level is too low, the slight variation
caused by a small or deep target may not be sufficient
to hear. Adjusting the level to below audible will ensure
silent operation but could mask the audio response from
small or deep targets.
Large
To Low
gold signal
Audio range
that you are
able to hear
Noise
Threshold
Level
Large
Optimum
gold signal
Audio range
that you are
able to hear
Noise
Threshold
Level
Large
Too High
gold signal
Audio range
that you are
able to hear
Threshold
Noise
Level
Signal audibility with different Threshold Level settings
Threshold Pitch
Threshold Pitch allows you to adjust
the pitch of the Threshold tone.
Hearing will vary between individuals,
so adjust the Threshold Pitch to a level
that is comfortable for your hearing. The Threshold Pitch
has a range of 1-100, with a preset of 53.
25
Small
gold signal
Noise
Small
gold signal
Noise
Small
gold signal
Noise