MEASUREMENT OF PHASE DISTORTION 



545 



1000 1200 1400 



CYCLES PER SECOND 



Fig. 10 — Envelope delay characteristic for 231 miles of 19-ga. H-174 side circuit. 



1600 2000 2400 



CYCLES PER SECOND 



Fig. 11 — Envelope delay characteristics for 19-ga. H-44-25 circuits. 



