receiver instrumentation system by coupling cables fig1 shows a housing 110 for this pulser receiver instrumentation system coupled to a transducer array 120 by coupling cables 150 the pulser receiver system may include a phase coupled inverse frequency spectrum analyzer an attenuator one or more amplifiers one or more display devices and a quarter wave filter assembly the pulser receiver instrumentation system includes a pulsing system for inducing high frequency mechanical vibrations in the piezoelectric transducers and a receiving system for electrical signals created by the detection of vibrations by the piezoelectric transducers e g the phase coupled inverse frequency spectrum analyzer the pulser section of the system can generate short large amplitude electric pulses of controlled energy which are converted into short sonic to ultrasonic pulses e g about 1 khz to about 15 mhz about 2 khz to about 5 mhz about 10 khz to about 3 khz or any value or range of values therein when applied to a piezoelectric transducer the receiver section of the system can receive and interpret the electrical signals e g currents produced by the piezoelectric transducers when they are deformed by mechanical vibrations the receiver section may include a frequency spectrum analyzer capable of receiving and converting the electrical signals generated by the piezoelectric transducers into digital frequency data that can be displayed on a display device example frequency spectrum analyzers that may be used include the digital mobile radio transmitter tester model no ms8604a manufactured by anritsu and the agilent hp 7000x series of spectrum analyzers the pulser instrumentation system may also include one or more multi channel amplifiers for increasing the power of.