Return System AGC In Two-Way CATV Systems (1972)
By Henry B. Marron & Lawrence I. Fawber, Jerrold Electronics Corporation
This paper will examine the problem of automatic gain control (AGC) for the return direction in two-way systems. In contrast to the downstream direction where one or two pilots are distributed over the system, a return system will use a multiplicity of pilots. These pilots are injected at system extremities and travel back to the head end unless prevented from so doing. The problems and desirability of stopping pilots is considered as applied to various types of pilot. The types of pilot considered include CW pilots, audio frequency modulated pilots, pilots with synchronized frequencies and also pilot control signals consisting of band limited white noise.
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