CDI TRAXALL 620: TRAXALL 501: TRAXALL 500: User Manual page 25

PINPOINTING
OPERATION TRAXALL 620/501/500 USER GUIDE
At the null point you are directly over the pig. Move the antenna back an
inch or two, and the signal strength will rise (depending on gain se ng).
Move farther away and the signal will disappear altogether.
RECEDING SIGNAL
PEAK
NULL
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