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BELL SYSTEM TECHNICAL JOURNAL 



represents energy as a function of frequency. Different magnetrons are 

 used with the two pulses; their operating frequencies and power capacities 

 differ widely. Apparently frequency modulation exists in both cases to a 

 small extent indicated by the departure of each spectrogram from s}Tnmetry 

 about a vertical axis. Detailed study, however, shows that the band 



TO MAGNETRON 



TO 5D2I TUBE 



CLIPPING CHOKE LOAD CONDENSER LINEAR COIL 



Fig. 5 — Typical power pulser network. 



width of the main energy lobe differs inappreciably from that with zero 

 frequency modulation, and that the dispersion of energy attributable to 

 frequency modulation is negligibly small. The pulses shown therefore 

 provide satisfactory performance with their respective magnetrons. 



Pulser Box 



The form in which the typical power pulser network appears is shown in 

 Fig. 5. Power peaks generated by the particular network shown are of the 



