fl 



WAVEGUIDE TESTING WITH MILLIMICROSECOND PULSES 



55 



TAPERED 



DELAY 



DISTORTION 



EQUALIZER 



WAVEGUIDE 



SHORTING 



SWITCH 



1/ 



'M 



^ 



te; 



>T0 RECEIVER 



NOT EQUALIZED 

 (SWITCH CLOSED) 



EQUALIZED 

 (SWITCH OPEN) 



TEqiIN 3 DIAM ROUND GUIDE 

 (107 FT LONG) 



Fig. 14 — The left-hand series of pulses shows the build up of delay distortion 

 with increasing number of round trips in a long waveguide. The right-hand series 

 shows the im]irovement obtained with the tapered delay distortion equalizer 

 shown at the right. 



