Table I.

Configuration of each probe and transmission/reception conditions.

	L22-14vX	L35-16vX	L38-22v	L39-21gD	MS550D
Designed center Freq [MHz]	15.63	26.79	31.25	31.25	37.50
Sampling Freq [MHz]	62.5	107.1	125	125	150
Tx/Rx elements	128	128	128	128	256
Element pitch [μm]	100	70	69	55	55
Elevation focus [mm]	6	8	8	6.5	7
Input voltage [V]	25	40	25	30	25
Actual center Freq [MHz]	15	20	29	30	29
Actual −6 dB bandwidth [MHz]	14–17	15–30	26–32	27–33	27–37