abs 규정을 해석하는데.....
이 넘이 무슨 말인지 해석이 안되네요

답변 부탁드립니다



Vertical linearity is to be checked by positioning the master transducer over the depth
resolution notch in the IIW Block so that the signal from the notch is at a height of three scale
divisions (30% of the full screen height),
height of 6 scale divisions (60% of the full screen height).



지식이 없는 부분은 해석하는데 더 힘드네요..