... calibration of transducer zero offset and/or material velocityFlaw Locating,Live display Sound-path, Projection (surface distance), Depth, ... A-scan displayPeak Hold,Compare frozen peak waveforms to live A-Scans to easily interpret test results.A Scan Freeze,Display ... 100, 200, 400 ohmsBandwidth (amplifier bandpass ) 0.5 to 15 MHzGate Monitors,Two independent gates controllable over entire sweep ...