Measuring And Evaluating Video Signals In The Headend (1992)
By Blair Schodowski and James O. Farmer, Scientific-Atlanta, Inc.
The NCTA and the cities have recently agreed to, among other things, a set of basic measurements to be made on video signals. We'll show you how to make the new measurements, and tell you what they mean. We'll also discuss other basic measurements that should be made in order to provide good signals. The measurement emphasis is on practical things that can be done in the headend, using available equipment augmented with devices that can be built in the system. In looking at various cable systems, we have collected some prime examples of what good video does NOT look like. Baseband video and modulation are reviewed.
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