Phase Fluctuation of Television Carrier due to Radio Propagation

Abstract

The synchronized carrier television system utilizes television channels effectively. However, phase fluctuation in the vision carrier reduces the protection ratio against co-channel interference.
This paper investigates the phase fluctuation of a vision carrier. Experiments analyze two elements ; transmitter fluctuation and added fluctuation from radio propagation. It is shown that this additional fluctuation over long distances is very small whenever the path is in the line-of-sight.
This paper also discusses the visibility of phase fluctuations in television ghost images, and points out that these measured fluctuations do not create problems for the planning of a synchronized carrier television system.