Abstract: The method pertains to wireless transmission in the common-wave operation. For the operation of common-wave networks, it is required that the modulation contents of the transmission frequencies (1 . . . m) transmitted by the individual transmitting stations are identical. However, in order to enable a station or regional identification, one or more regionally differing additional carrier frequencies (n-3 . . . n) are transmitted, whose reception permits the selection of specific regionally related news or messages in the receiver. The demand of additional carrier frequencies may be reduced to four individual frequencies or frequency groups, if these additional carriers are modulated.

Abstract: An exemplary embodiment includes a circuit for fading-in a time scale into the television image. A mark is movable over the time scale. A selector is provided for the purpose of programming times when image formation is to take place. The selected programming times are determined by the position of the mark with respect to the time scale when the selector is actuated.

Abstract: In an exemplary embodiment, a timing device sets the fluoroscopy time, and a program setting and display device displays the instantaneous values of the fluoroscopy voltage and current. An arithmetic unit is provided to which signals are supplied which correspond to the fluoroscopy voltage, the fluoroscopy current, and the fluoroscopy time, and which is so designed that it forms the arithmetic mean values of these quantities and brings them to display.