White’s Electronics TDI Pro - Manual (Page 10)

10 TDI Pro Owner’s Guide
WARNING -
• Use only to recharge White’s 14.8 Volt Lithium-Ion battery
pack #510-0023.
• Do not expose the battery or charger to rain or severe
humidity (it is not weather resistant).
• Keep all charger and batteries out of reach of children.
• During charging, position battery and charger on least
combustible surface available.
• Designed for use with negative ground 12 volt electrical
systems only.
CONTROLS
ON/ OFF Gain -
What it does
The ON/OFF GAIN control turns the Pulsescan TDI Pro, ON (clockwise)
and OFF (fully counterclockwise) and selects the range at which the de-
tector will hear a given target. Gain increases or decreases the amplifi ca-
tion of the receive signal determining both how deeply the Pulsescan TDI
Pro will hear a target (in ideal conditions) combined with how it is infl u-
enced by ground and external interference (in less than ideal conditions).
How to use it
Ground mineralization gets in the way of hearing target signals. This so-
called bad ground can be balanced out by a ground balance procedure (a
form of fi ltering) so that targets can be heard clearly. This process can be
accomplished more easily and effectively if the Gain is set at an appropri-
ate level.