Some of the new flaw detectors on the market offer a square wave pulser circuit. What does this do for me, the UT tech? What difference will I see? Will I notice anything? Is this simply a gig to sell new instruments? If it improves the method to the point that I can tell the difference, Im all for it, but if its an improvement within the unit that I wont ever be able to tell is even there, then im less than interested.
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