New Technique Permits Summation Sweeps Without Interruption of CATV Subscriber Service

This paper describes a technique of testing applicable to CATV systems. It permits a determination of the transmission characteristic over the entire TV and FM spectrum during normal operation and use. The requirements for this method of testing are: 1) no annoying interference with the TV pictures, 2) no interference with system operating levels, 3) no interference with system automatic gain control, 4) no breaking into system or cabling, 5) must be capable of use from a truck and have no requirement to synchronize with city power mains.