Tape drive 



I I 



Tape 



~j\/^ 



Tektronix Computer 



Waveform is transferred, and 

 stored on a magnetic data tape 



External trigger 



Conditioned signal 



Initial conditions: 



RX & TX - 19" apart 

 RX & TX - 1" away from 

 timber pile 

 TX = Transmitter 

 RX = Receiver 



■ Transducer holder 



Figure 7. Schematic of ultrasonic test system configuration. 



