Why does my locator signal seem wide?

Sensitivity (gain) is likely too high. Lowering sensitivity tightens the signal field and makes the center easier to identify.

Why does the peak move as I walk?

This can occur when signal is coupling onto nearby conductors or when grounding is poor.

No. A locator detects the electromagnetic field around a conductor, not the physical pipe.

The receiver sensitivity is set too high or the signal is bleeding onto adjacent utilities.

Yes. Higher frequencies tend to spread more easily onto nearby conductors, while lower frequencies stay tighter to the intended line.

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