... 4. Real-time help tips, ultrasonic flaw detection wave diffraction to solve the traditional single-scan detection limits ... will need to re-set)Parameter Pulse typeNegative square wave pulse(adjustable)Pulse edge<10nsPulse width30~1000ns continuously ... 15MHz,0.5~20MHz(broadband)Waveform displayradio-wave, full wave, positive half-wave, negative half-wave Sound Velocity Range300~20000m/sSound range5~200 ...