ANALYZER FOR COMPLEX ELECTRIC WAVES 



245 



In Fig. 13 are shown the third harmonic output of an " O " tube with 

 a single input frequency of constant ampHtude and with a variable 

 load impedance. The harmonic current shown by this curve could 



4000 



6000 12 000 IfeOOO 20 000 



LOAD RESISTANCE -OHMS 



24 00O 



.03 H 

 O 



.02 



2d000 



Fig. 13 



not easily be predicted from computation due to the many factors in- 

 volved, and can be measured only by an instrument of high sensitivity 

 that can faithfully follow the varying amplitudes of a minute current. 

 Voltage Analyzer. In addition to its use as a current measuring 

 device the current analyzer may be used, as previously mentioned, for 

 measuring the voltage in circuits where the power dissipation is very 



