An ultrasonic diagnostic apparatus comprising an ultrasonic transmitting unit, an image signal generating unit and a signal addition unit. A spring arm may be formed over a microspring dimple, which may be hemispherical and hollow in one embodiment. The digital signal processor interpolates each group of time domain data to produce interpolated time domain data having a number of data points that satisfies a Nyquist condition for a combined bandwidth of the frequency conversion paths. Additionally, diagnostic information relating to an application is collected and then stored within a high speed memory. When used with a pair of transmissions, a linkage may join the control mechanisms of each transmission to synchronize their torque adjustments.