Abstract: The base station comprises a reference carrier generator and a synchronized carrier generator is provided in at least one remote station. Carrier synchronizing information is transmitted from the base station to the remote station and the synchronized carrier and information to be transmitted therewith are transmitted from the remote station to the base station. The base station has a periodically variable phase shifter to an input of which the synchronized carrier is applied, an output being coupled to a phase comparator to which in addition the reference carrier wave is applied. During first periods the phase shifter is subjected to a continuous phase shift. Second periods present in the first period are counted by a counter which is resettable under the control of the first periods. The counter is stopped by the phase comparator when a reference phase is reached during the phase shift. The counting result is numerical carrier synchronizing information, as required for a micro-processor or a micro-computer.

Abstract: Method for automatically setting up a television camera by means of a microcomputer. The setup is effected in two separate steps, a test pattern being used in each step. An external test pattern is present on a test chart in front of the camera and an internal test pattern is present in the camera in the optical path between a camera lens system and a camera pickup arrangement. During the setup with the internal test pattern, the lens system is optically blocked and correction information is stored in a memory. During or after the setup with the external test pattern, the correction information associated with the internal test pattern is subtracted from the correction information associated with the external test pattern. The resulting correction difference information is lens correction information and is stored in a memory associated with the lens system.

Abstract: In a color television camera system of the type having camera tubes for the production of red, green and blue color signals, contour signals derived from only one of the color signals are added to all of the color signals.