Abstract: The optoelectronic distance measuring, signal processing and display device and the operating method upon which such a device is based are characterized in that a current function state of the device and changes made thereto by the user are shown graphically on a display of the device by at least one of icons, numbers and symbols, wherein active changes in the currently indicated function state are carried out exclusively by selecting at least one of the respective icons and numerical input. In such a device, no language-specific or country-specific fonts and programming language components are needed.

Abstract: A drive device for aligning a theodolite with a target, in which the theodolite is mounted rotatably in the horizontal direction on a theodolite foot. Provision is made of a control knob and an encoder connected thereto, the encoder emitting control signals in accordance with the rotary movement at the control knob to a downstream control circuit. The circuit drives a positioning motor. The rotary table is arranged at the theodolite foot and carries the control knob. Provided between the theodolite and the rotary table is an electric contact which ensures the electrical connection between the encoder and the positioning motor.