Remote control TV subcarrier phase shifter system

The remote control of the subcarrier phase at each of a plurality of television cameras is provided by a digital encoder located near a remote monitor and camera switching network location. The encoder transmits binary coded signals to a color subcarrier phase shifter in the separate cameras. For th...

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Bibliographic Details
Main Author BREITHAUPT; DAVID W
Format Patent
LanguageEnglish
Published 05.05.1981
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:The remote control of the subcarrier phase at each of a plurality of television cameras is provided by a digital encoder located near a remote monitor and camera switching network location. The encoder transmits binary coded signals to a color subcarrier phase shifter in the separate cameras. For the coarse phase selection, a first binary code signal selects a tap point along a delay line. For fine phase selection, a second binary code signal is decoded to provide D.C. voltage amplitude levels. These D.C. voltage levels are applied to a pair of comparators. The output from the tapped delay line is also applied to the comparators. The phase of the output from the comparators is advanced or retarded in direct correspondence to the amplitude level and polarity of the D.C. voltages applied to the comparators.
Bibliography:Application Number: US19790023953