MULTICHANNEL MODULATION SYSTEM 



Fig. 2. Rear view. Cables in the horizontal ducts carry timing pulses leftward from 

 the synchronizing bay. 



that sidebands produced by sampling do not overlap to introduce distortion, 

 as illustrated in Fig. 3. For a speech band extending up to 3403 cycles, a 

 reasonable sampling rate is eight kilocycles. 



Samples may be intermittently-transmitted portions of the signal wave, of 

 appreciable duration, or they may be essentially instantaneous amplitudes. 



