Vflex Technology - Minelab X-terra 305 Instruction Manual

The 2nd generation X-Terra Series incorporate
Minelab's proven VFLEX Technology.
VFLEX uses state of the art digital and mixed-signal
components to enhance standard single frequency
technology by replacing most of the analogue
circuitry with digital signal processing. The small
amount of analogue circuitry still employed has been
very carefully designed and calibrated to obtain the
outstanding sensitivity, stability and repeatability
required to match the performance of the processing
in the digital domain.
This radical departure from traditional approaches to
metal detector design has been made possible by
advances in electronics that power personal digital
assistants, cell (mobile) phones and high-fidelity
portable audio equipment.
Power
Audio Transmit
Supply
Analog Signal
Primary micro
(in control box)
Digital Signal ProceSSing
(DSP)
coDec Signal converSion
Keypad LCD Receive
Control Box
Transmit
SeconDary micro
(in coil)
SenSing + tranSmitting
coil tyPe, Size, frequency
Analog Signal
Receive
Coil
Standard VLF Signal Precision VFLEX Signal
(Without VFLEX)
For the X-Terra user, this precision means
dependable performance and improved immunity
to environmental conditions such as ground
mineralisation, electromagnetic interference and
temperature variations.
VFLEX requires coils that are accurately constructed
and calibrated. Every time the detector starts up,
the micro-controllers in the control box and the coil
establish communication through a digital data link.
Information about the coil is sent to the control box,
so the detector 'knows' what type of coil is attached
and can set the correct operating parameters.
This optimises the performance, and also makes the
detector 'future proof' , in that it will be capable of
operating at different frequencies depending on the
electronic properties of the coil.