Abstract: Measuring and/or control system (1) for detection of the distance of an object (2) or of a person from a predetermined reference point, with a first transmitting/receiving device (10) for generation and wireless transmission of a control signal to a separate second transmitting and/receiving device (30), as well as for receipt of an acknowledgment signal generated from the second transmitting/receiving device (30) upon receipt of the control signal, whereby both of the transmitting/receiving devices display on the transmitting side a signal source (23, 24, 25, 26) that generates as a control and/or as an acknowledgment signal, pulses that display during the duration of the pulse a monotonically falling or rising frequency, or that consists of a super-position of these types of pulses in pairs, the other current transmitting/receiving device (10, 30) displaying on the receiving side for time compression of the received pulses, at least one dispersion filter (11) having a predetermined frequency-dependent signa