What advantage do external focal law generators have over onboard calculators?

The advantage of external focal law generators over onboard calculators lies in their ability to utilize advanced beam modeling software, thereby enhancing the inspection process. Beam modeling software allows for the simulation and optimization of ultrasonic beams, which can lead to more precise targeting of defects in the material being inspected. This capability enables technicians to better adapt the focal laws to the specific geometry and characteristics of the test piece, ultimately improving the sensitivity and accuracy of the inspections.

By leveraging external focal law generators, inspectors can implement more complex and refined algorithms that might be limited or unavailable in onboard calculators. This advanced software approach can result in improved inspection outcomes, making it a significant advantage during the use of phased array technology.

The other options focus on features that, while potentially useful, do not directly impact the effectiveness of the inspection process in the same way that advanced beam modeling does.