Abstract: A calibration system for a measurement application device is described where the calibration system includes a port calibration unit for each one of at least two ports of the measurement application device, and a central switching unit that includes an input port for each one of the port calibration units and controllably couples at least two of the input ports to each other in pairs. Moreover, each one of the port calibration units includes a device coupling port for coupling the respective port calibration unit to the respective port of the measurement application device, and a central coupling port for coupling the respective port calibration unit to the respective input port of the central switching unit. Also, each one of the port calibration units includes a calibration section, and a switching section. The present disclosure further provides a respective method.

Abstract: The present disclosure provides a calibration system for a measurement application device, the calibration system comprising a port calibration unit for each one of at least two ports of the measurement application device, and a central switching unit that comprises an input port for each one of the port calibration units and controllably couples at least two of the input ports to each other in pairs, wherein each one of the port calibration units comprises a device coupling port for coupling the respective port calibration unit to the respective port of the measurement application device, and a central coupling port for coupling the respective port calibration unit to the respective input port of the central switching unit, and wherein each one of the port calibration units comprises a calibration section, and a switching section. The present disclosure further provides a respective method.

Abstract: An antenna for a mobile transmitter and/or receiver device suitable for a hand-held transmitter/receiver for a wireless microphone includes a monopole or dipole antenna element for the excitation of a monopole or diopole and an additional antenna element for the excitation of a parallel line mode.

Abstract: A method for producing and detecting a transmit signal for frequency-modulating (FM) audio transmission systems, in particular for audio radio transmission systems, includes transmitting a first signal component (useful signal) that comprises audio information, and transmitting a second signal component (additional signal) that contains status information and/or control information, wherein after FM demodulation, the second signal component comprises main spectral components below the audio information useful spectrum in the baseband of the transmit signal. This method can be achieved using a circuit including a programmable phase locked loop (PLL) that determines a transmit frequency, whose divider and/or counter register is periodically reprogrammed by a microcontroller in such a way that the unmodulated carrier of the transmit frequency is periodically deflected from its fundamental frequency.

Abstract: An antenna for a mobile transmitter and/or receiver device suitable for a hand-held transmitter/receiver for a wireless microphone includes a monopole or dipole antenna element (12) for the excitation of a monopole or dipole and an additional antenna element (13) for the excitation of a parallel plate line mode.