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Pulse delay, Tdi sl, Owner’s manual – White’s Electronics TDI SL 7.5 and 12 User Manual

Page 17

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Page 17

TDI SL

Owner’s Manual

A lower threshold makes the TDI quieter and less chattery

but also requires a stronger target signal to produce a tonal
response:

A lower threshold can be played off against a higher

Gain

set-

ting, although you may find that the net outcome is about the
same.

Setting the threshold exceptionally low can result in a

“silent search” audio, whereby there is no audio sound until a
target is detected:

The drawback is that sensitivity can be markedly reduced and
weaker targets completely eliminated. However,

Gain

can be

increased to counter this, though the net result is still likely to
be less sensitivity than an optimally adjusted threshold.

Pulse Delay

Sampling as close as possible to the end of the transmitted

pulse gives the highest sensitivity to all metal targets regardless
of their size or conductivity. As the

Pulse Delay

is increased

toward 25

s low-conductive targets will drop out, leaving only

the more high-conductive targets.

Conductivity is not the only factor that determines how tar-

gets respond; size, thickness, and shape also have a strong influ-