A New Approach to Evaluating CATV System Triple Beat Performance (1974)
By John A. Franke, Dr. Tom M. Straus and Bert L. Henscheid, Theta-Com
As the number of channels carried by a CATV system increases much past twelve, the predominant distortion limiting performance changes from Cross Modulation to Triple Beat products. The mathematics of Triple Beat build-up and its characteristics are briefly reviewed for background. Experimental data on triple beat measurements using various techniques is then presented to illustrate the problems and limitations of current test methods as related to practical system design and operation. Based on further experimental work, a new approach to evaluating CATV system triple beat performance will be discussed, which yields a test technique whose results may be directly correlated to visible degradation of the received picture.
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